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Sociocultural practices in Ethiopia: association with onset and persistence of postnatal common mental disorders

Published online by Cambridge University Press:  02 January 2018

Charlotte Hanlon*
Affiliation:
Health Service and Population Research Department, Institute of Psychiatry, King's College London, UK Department of Psychiatry, Faculty of Medicine, Addis Ababa University, Addis Ababa, Ethiopia
Girmay Medhin
Affiliation:
Aklilu-Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia
Atalay Alem
Affiliation:
Department of Psychiatry, Faculty of Medicine, Addis Ababa University, Addis Ababa, Ethiopia
Mesfin Araya
Affiliation:
Department of Psychiatry, Faculty of Medicine, Addis Ababa University, Addis Ababa, Ethiopia
Abdulreshid Abdulahi
Affiliation:
Department of Psychiatry, Faculty of Medicine, Addis Ababa University, Addis Ababa, Ethiopia
Mark Tomlinson
Affiliation:
Department of Psychology, Stellenbosch University, South Africa
Marcus Hughes
Affiliation:
Health Service and Population Research Department, Institute of Psychiatry, King's College London, UK
Vikram Patel
Affiliation:
Nutrition and Public Health Intervention Research Unit, London School of Hygiene and Tropical Medicine, London, UK, and Sangath Centre, Goa, India
Michael Dewey
Affiliation:
Health Service and Population Research Department, Institute of Psychiatry, King's College London, UK
Martin Prince
Affiliation:
Health Service and Population Research Department, Institute of Psychiatry, King's College London, UK
*
Charlotte Hanlon, MRCPsych, PhD, Department of Psychiatry, Faculty of Medicine, Addis Ababa University, PO Box 9086, Addis Ababa, Ethiopia. Email: charlotte.hanlon@kcl.ac.uk
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Abstract

Background

Traditional perinatal practices may protect against postnatal common mental disorders (CMD) in non-Western societies.

Aims

To evaluate the association between perinatal practices and postnatal CMD in rural Ethiopia.

Method

A population-based sample of 1065 women was followed up from pregnancy until 2 months postpartum. Qualitative investigation informed the development of scales measuring attitudes towards and adherence to perinatal practices. Postnatal CMD was measured using the Self-Reporting Questionnaire.

Results

Endorsement of sociocultural perinatal practices was associated with lower odds of antenatal CMD persisting into the postnatal period (adjusted odds ratio (OR) = 0.66, 95% CI 0.45–0.95). Women who endorsed protective and celebratory perinatal practices but were unable to complete them had increased odds of incident (adjusted OR = 7.26, 95% CI 1.38–38.04) and persistent postnatal CMD (adjusted OR = 2.16, 95% CI 1.11–4.23) respectively.

Conclusions

There is evidence for an independent role of sociocultural practices in maintaining perinatal mental health in this Ethiopian community.

Type
Papers
Creative Commons
Creative Common License - CCCreative Common License - BYCreative Common License - NC
This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial licence (http://creativecommons.org/licenses/by-nc/4.0/), which permits noncommercial re-use, distribution, and reproduction in any medium, provided the original work is unaltered and is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use or in order to create a derivative work.
Copyright
Copyright © Royal College of Psychiatrists, 2010

The extensive sociocultural elaboration of the perinatal period in non-Western societies has been hypothesised to protect against the onset of postnatal common mental disorders (CMD: characterised by significant levels of depressive, anxiety and somatic symptoms). Reference Stern and Kruckman1 Epidemiological studies from non-Western countries challenge this view, Reference Halbreich and Karkun2 finding the prevalence of postnatal CMD to be largely comparable with that seen in Western countries. Reference O'Hara and Swain3 Specific postnatal practices have been variably associated with postnatal CMD in non-Western countries, Reference Ho-Yen, Bondevik, Eberhard-Gran and Bjorvatn4Reference Grace, Lee, Ballard and Herbert8 highlighting the need for a contextualised understanding of the meanings associated with perinatal practices in a particular sociocultural setting. We are aware of only one previous study (from Hong Kong) that used ethnographically informed epidemiological methods to explore the relationship between traditional postnatal practices and postnatal mental health. Reference Lee, Yip, Leung and Chung5,Reference Chan, Levy, Chung and Lee9 No such studies have been published from sub-Saharan Africa.

The Perinatal Maternal Mental health in Ethiopia (P-MaMiE) study is a mixed method study that was undertaken to evaluate the impact of sociocultural practices on risk of postnatal CMD in rural Ethiopia. On the basis of initial qualitative work Reference Hanlon, Whitley, Wondimagegn, Alem and Prince10 and the literature, the following hypotheses were generated: antenatal women who endorse adherence towards traditional sociocultural perinatal practices will be protected against incident postnatal CMD and in these women, non-completion of postnatal practices will be associated with increased risk of incident and persistent postnatal CMD.

Method

Ethical approval was obtained from the research ethics committees of the participating institutions in Ethiopia and the UK.

Setting

The P-MaMiE study was located within the demographic surveillance site in Butajira, which forms part of the Butajira Rural Health Programme. Reference Berhane, Wall, Kebede, Emmelin, Enqueselassie and Byass11 Butajira is a predominantly rural area of Ethiopia located 130 km south of the capital city Addis Ababa. Around Butajira, the livelihood of residents is based on mixed farming, with khat (an amphetamine-like psychostimulant) and chilli pepper as the main cash crops and maize as the predominant subsistence grain. Maternal mortality rates are estimated at 400–850/100 000 births. Reference Berhane, Andersson, Wall, Byass and Hogberg12 Fewer than 10% of women attend for delivery in a health facility or receive any formal postnatal care. 13

Developing measures of sociocultural perinatal practices

Identifying perinatal practices

In our previous qualitative study, sociocultural patterning of the perinatal period was explored in relation to women's perinatal mental health. Reference Hanlon, Whitley, Wondimagegn, Alem and Prince10 In brief, a total of 25 in-depth interviews and 5 focus-group discussions, involving 78 informants, were conducted with community stakeholders in the Butajira area. Open questions were used to probe systematically about perinatal practices and the potential impact on the mother if she was unable to fulfil them. Perinatal women in rural Ethiopia are commonly expected to adhere to a series of prohibitions and prescribed practices that serve to protect them against harm and restore health following childbirth. Certain celebratory practices that recognise the woman's role transition are also culturally endorsed. We used these data to operationalise measures of women's attitudes towards and adherence to perinatal practices. Those perinatal practices that recurred across accounts and whose non-performance was considered by participants to result in adverse consequences, were selected for inclusion in the quantitative study. This resulted in selection of 13 perinatal practices, 8 protective and 5 celebratory (Table 1).

Table 1 Frequency distribution of endorsed and non-completed perinatal sociocultural practices

Items included in scales
Perinatal practice Endorsing practice antenatally, n (%) Not carrying out practice if endorsed, n (%) Antenatal sociocultural attitudes scale Discordant protective practices scale Discordant celebratory practices scale
Pregnancy practices
    Should cover abdomen (to conceal the pregnancy) 548 (57.5) Yes
    Should restrict diet 563 (59.3) Yes
    Should carry pot on back 573 (60.1) Yes
    Should prepare for postnatal period 925 (97.1)
    Should perform dua/derema a 600 (63.0) Yes
Postnatal practices
    Should slaughter animal 761 (79.9) 398 (41.8) Yes
    Should receive gifts 803 (84.4) 153 (16.1) Yes
    Should bury placenta 879 (92.2) 101 (10.6) Yes
    Should carry metal 785 (82.4) 129 (13.5) Yes Yes
    Should speak softly 856 (89.8) 102 (10.7) Yes Yes
    Should avoid cold air/draughts 935 (98.1) 62 (6.5) Yes Yes
    Should do bathing ceremony 938 (98.4) 25 (2.6) Yes
    Should perform dang merget b 710 (74.5) Yes

Attitudes and adherence to perinatal practices

Sociocultural perinatal attitudes. Perinatal practices were turned into a series of statements (Table 1). At the antenatal time point, participants were asked to indicate their level of agreement on a five-point Likert scale (not at all, not much, neither agree nor disagree, somewhat, very much). Antenatal attitudes towards perinatal sociocultural practices were dichotomised (item endorsed – agree somewhat or very much).

Discordance between attitudes and adherence. At the 2-month postnatal time point, women were asked whether they had completed specific postnatal practices. New variables were defined for women who endorsed specific postnatal practices antenatally and then did not carry them out postnatally (Table 1).

Mokken scaling

Responses to the perinatal attitudes and adherence questions were analysed using Mokken analysis. Reference Mokken14 This approach has been used widely in psychology, education and social science research, and more recently has been applied within psychiatric research. Reference Watson, Deary and Shipley15 Mokken analysis utilises non-parametric item-response theory to evaluate the presence of a hierarchical scale within a set of responses. Reference Watson, Deary and Shipley15 In Mokken scales, the relative ordering of items is assumed to reflect ordering along an underlying latent trait. The presence of a Mokken scale justifies summing item scores.

Following standard procedure, item-pair Loevinger coefficients for both perinatal attitudes and discordance between attitudes and adherence were inspected and the highest were sequentially added to the scale, retained if the Loevinger H item-scale coefficient for the individual item was ≥0.30. The conditions of monotone homogeneity and double monotonicity were assessed and items leading to violations were removed. The Loevinger H for each final scale was evaluated. A scale is considered dimensionally weak for Loevinger coefficients between 0.30 and 0.39, moderate for coefficients between 0.40 and 0.49 and strong for coefficients of 0.50 or higher. Reference Mokken14

Population-based cohort study

Sample

Eligible women were between the ages of 15 and 49 years, able to speak Amharic (the official language of Ethiopia), living in the demographic surveillance site area and in the third trimester of pregnancy during the study recruitment period (July 2005 to February 2006). Women were identified by the Butajira Rural Health Programme enumerators in the course of their 3-monthly surveillance interviews and, after giving informed consent, were interviewed by the project data collectors. Of eligible pregnant women, 1065 (86.3%) were successfully recruited. Non-recruited women did not differ significantly from participating women in terms of age, religion, ethnicity, level of literacy or location of residence. All women were reimbursed for healthcare costs for themselves and the project child for the duration of the project. Any women suffering from severe mental disturbance were given money for transport and referred for assessment to the local psychiatric unit in Butajira town, staffed by two psychiatric nurses and a general practitioner.

Data collection

The project data collectors were local women with completed high-school education who worked exclusively on the P-MaMiE project and had been trained for a minimum of 1 week in questionnaire administration and anthropometric measurement. They interviewed participating women during their pregnancy and 2 months after delivery. The Butajira Rural Health Programme enumerators and traditional birth attendants obtained additional information shortly after birth.

Measures

All questionnaires were translated into Amharic and administered to the project women in their homes or surrounding area, with every attempt made to ensure privacy. Primary exposures were scales of sociocultural perinatal attitudes and discordance between attitudes and adherence. The outcome measure was the incident and persistent postnatal CMD. Symptoms of CMD were measured using the Self-Reporting Questionnaire (SRQ–20). Reference Beusenberg and Orley16 This 20-item scale asks about depressive, anxiety and somatic symptoms present in the preceding month and generates a continuously distributed scale score indicating level of overall psychological morbidity. The SRQ–20 has been used in previous Ethiopian community-based studies, Reference Alem, Kebede, Woldesemiat, Jacobsson and Kullgren17 but was extensively prevalidated for use in a mixed sample of pregnant and postnatal women in the Butajira population. Reference Hanlon, Medhin, Alem, Araya, Abdulahi and Hughes18 High levels of CMD symptoms were defined as a score of ≥6 on the SRQ–20.

Fig. 1 Flow diagram of follow-up between pregnancy and 2-month postnatal time point for subcohorts 1 and 2 of the Perinatal Maternal Mental health in Ethiopia (P-MaMiE) cohort.

CMD, common mental disorder.

Subcohort 1: antenatal Self-Reporting Questionnaire (SRQ–20) ≥6;

Subcohort 2: antenatal SRQ–20 <6. CMD, common mental disorders.

The importance of disaggregating the effects of risk factors on new-onset postnatal CMD compared with CMD persisting from the antenatal period is increasingly recognised. Reference Chandran, Tharyan, Muliyil and Abraham19 Therefore, two subcohorts of women were defined according to the number of CMD symptoms at the pregnancy time point: subcohort 1 with high antenatal CMD (SRQ–20 ≥6) and subcohort 2 with low antenatal CMD (SRQ–20 <6) (Fig. 1). High postnatal CMD symptoms were therefore divided into incident (occurring in subcohort 2; low antenatal CMD) and persistent (occurring in subcohort 1; high antenatal CMD).

Potential confounders

Domains of potential confounders were defined as below. All except infant gender and maternal postnatal ill health were measured at the antenatal time point. Items (h), (i) and (j) were only considered confounders for discordance between attitudes and adherence to perinatal practices.

  1. (a) Maternal age and parity.

  2. (b) Parental education.

  3. (c) Socioeconomic status: level of household wealth relative to others (lower v. the same or greater), experience of hunger in the preceding month due to lack of money, indebtedness, lacking the resources to survive for 1 month in the event of an emergency. Living standard was indicated with the following variables: ownership of a business, bed and radio, availability of a latrine and sanitary means for disposal of rubbish, having a window within the home. A hierarchical living standard scale of these six items was confirmed using Mokken analysis (Loevinger H coefficient 0.45).

  4. (d) Residence: living in Butajira town v. one of the nine rural subdistricts.

  5. (e) Gender disadvantage: polygamous marriage, non-consenting marriage, experiencing violence and degree of household autonomy. The latter was assessed by asking whether the woman had to ask her husband before she was able to sell crops, spend household money, attend meetings, purchase medications for herself or her children, attend a health facility. Responses to the five categories were summed and recategorised as follows: always has to ask, sometimes asks, never asks.

  6. (f) Antenatal CMD: SRQ–20 score.

  7. (g) Social support: frequency of contact with family and friends (dichotomised as monthly or less v. at least weekly), received insufficient help from family and with housework.

  8. (h) Marital discord: husband not providing enough help, relationship ‘average, bad or very bad’ (compared with good or very good), sometimes or often quarrel and perceiving that the husband drank too much alcohol. A marital discord scale of these four items was confirmed using Mokken analysis (Loevinger H coefficient 0.35).

  9. (i) Maternal nutritional status: body mass index (kg/m2) was calculated from anthropometric measurements in antenatal women, adjusted for gestational age at recruitment.

  10. (j) Maternal ill health: episodes of diarrhoea or malaria in 2 months since birth. For obstetric complications, a composite variable was created by summing responses to the following: instrumental or operative delivery, duration of labour greater than 24 h, bleeding after delivery and fever after delivery. The resulting scale was then categorised according to number of complications: zero, one, two or more.

Data analysis

Analyses were conducted using Stata/SE version 10.1 for Windows. Association with the potential confounding variables was evaluated for each perinatal practices scale: proportional odds ordinal regression for discordant attitudes and adherence scales, linear regression for the sociocultural perinatal attitudes scale. Chi-squared test-for-trend was reported for ordered categories. Exploratory multiple linear regression was conducted to identify variables independently associated with sociocultural attitudes score.

Multivariable logistic regression analysis was hypothesis-driven, presenting the association between (a) sociocultural attitudes scale, (b) discordant attitudes and adherence scales and the outcomes of incident and persistent postnatal CMD, adjusted for separate groups of confounders as defined above and, finally, with all potential confounders added simultaneously into the fully adjusted model.

The sample size was determined to address objectives of the P-MaMiE project other than those addressed within this paper.

Results

Hierarchical scales of attitudes and adherence

Sociocultural perinatal practices were endorsed by the majority of project women (Table 1). Analyses were conducted on the 954 women with singleton babies surviving to the 2-month time point. Mokken analysis indicated that 10 of the 13 items measuring antenatal attitudes towards different perinatal practices formed an acceptable hierarchical scale with a Loevinger H coefficient of 0.38 (sociocultural attitudes scale). Summing the items gave a scale with a median score of 8 (25th centile 6, 75th centile 10).

Discordance between a woman's antenatal endorsement of a practice and whether she had actually carried out the practice postnatally is shown in Table 1. Mokken analysis for these discordant items supported two hierarchical scales, discordant protective (three item; Loevinger H coefficient 0.35) and discordant celebratory (two item; Loevinger H coefficient 0.31). For the discordant protective scale, 742 (77.8%) of women reported no discordance, 147 (15.4%) were discordant for one protective practice, 49 (5.1%) for two and 16 (1.7%) disordant for all three. Considering the discordant celebratory scale, 493 (51.7%) of women reported no discordance, 369 (38.7%) were discordant for one celebratory practice and 91 (9.6%) for both.

Incident and persistent perinatal CMD

When considering all women with singleton babies surviving to the 2-month time point, follow-up rates were 96.6% (112/116) in subcohort 1 and 98.8% (842/852) in subcohort 2. High levels of prevalent postnatal CMD symptoms (SRQ ≥6) were found in 44 (4.6%) women. The proportion of women with low antenatal CMD scores (subcohort 1) having an onset of postnatal CMD (incident postnatal CMD) was 20/841 (2.4%), and the proportion of those with high antenatal CMD scores (subcohort 2) with persistent postnatal CMD was 24/112 (21.4%) (Fig. 1).

Variables associated with perinatal practices

In the multiple regression analysis, women who expressed positive attitudes towards perinatal practices (high scores on the sociocultural attitudes scale) were more likely to be Muslim and multiparous, and to have no formal education, a poorer living standard, to have been hungry in the preceding month and to have less autonomy in the home (online Table DS1). However, positive attitudes towards perinatal practices were also less likely to be associated with poor social support, being in debt or non-consenting marriage. Protestant women were significantly less likely to endorse the perinatal sociocultural practices.

Being discordant for celebratory practices was associated with worse socioeconomic status and living standards, older maternal age, higher parity, neither parent having received formal education, higher levels of antenatal CMD symptoms, higher levels of marital discord, being more likely to have been married without consent, and having had a malarial episode since giving birth. However, discordance for protective practices was not associated with any of the potential confounders (Table 2).

Table 2 Univariate proportional odds regression analysis of associations between potential confounders and score on the discordant protective and discordant celebratory scales

Proportional odds ratio (95% CI)
Potential confounders n (%) Mean (s.d.) Median (IQR) Discordant protective scale (0–3) Discordant celebratory scale (0–2)
Maternal age, years 26.9 (6.3) 0.98 (0.95–1.00) 1.03 (1.01–1.06)
Parity
    Primiparous 138 (14.5) Referencea Referencea
    2–4 births 423 (44.4) 1.03 (0.66–1.61) 1.91 (1.28–2.84)
    5 or more 392 (41.1) 0.83 (0.52–1.32) 2.44 (1.64–3.64)
No maternal education 762 (80.0) 0.94 (0.65–1.37) 1.67 (1.22–2.29)
No paternal education 349 (36.9) 0.87 (0.63–1.20) 1.40 (1.09–1.81)
Living standard scale (0–6) 1.85 (1.4) 1.04 (0.93–1.16) 0.81 (0.74–0.89)
Lower relative wealth 539 (56.7) 1.02 (0.75–1.39) 1.28 (1.00–1.65)
Indebted 79 (8.3) 1.37 (0.83– 2.27) 1.16 (0.74–1.81)
Hungry in last month 152 (16.0) 0.75 (0.48–1.17) 1.62 (1.17–2.25)
No emergency resources 528 (55.5) 1.01 (0.75–1.38) 1.57 (1.22–2.01)
Rural 818 (85.8) 0.87 (0.56–1.33) 1.41 (0.98–2.03)
Autonomy level
    Lowest 613 (64.8) Referenceb Referenceb
    Middle 188 (19.9) 1.03 (0.70–1.53) 0.81 (0.59–1.11)
    Highest 145 (15.3) 1.23 (0.81–1.87) 1.07 (0.76–1.52)
Polygamous marriage 173 (18.3) 0.99 (0.66–1.47) 1.28 (0.93–1.76)
Antenatal violence 22 (2.3) 0.33 (0.08–1.44) 1.34 (0.59–3.01)
Marriage without consent 176 (18.6) 1.17 (0.80–1.70) 1.48 (1.09–2.02)
Self-Reporting Questionnaire (SRQ–20) score 2 (4) 0.97 (0.92–1.02) 1.07 (1.03–1.11)
Sees family ≤monthly 282 (29.6) 1.07 (0.77–1.49) 1.73 (1.33–2.26)
Sees friends ≤monthly 230 (24.1) 1.04 (0.73–1.48) 0.92 (0.69–1.23)
Not enough help from family 189 (19.8) 0.59 (0.39–0.90) 1.48 (1.09–2.01)
Not enough help at home 578 (60.7) 1.01 (0.74–1.38) 1.03 (0.80–1.33)
Scale (0–4) 271 (28.7) 0.96 (0.79–1.16) 1.28 (1.10–1.49)
Body mass index in pregnancy, kg/m2 21.7 (2.3) 0.99 (0.92–1.05) 0.96 (0.91–1.02)
Obstetric complications
    0 330 (35.9) Referencec Referencec
    1 319 (34.7) 1.15 (0.80–1.65) 1.08 (0.81–1.46)
    ≥2 270 (29.4) 1.00 (0.68–1.46) 0.98 (0.72–1.34)
Diarrhoeal episodes 55 (5.8) 1.31 (0.71–2.40) 1.35 (0.79–2.29)
Malarial episodes 125 (13.2) 1.21 (0.79–1.86) 1.60 (1.11–2.29)
Girl 468 (49.1) 0.85 (0.63–1.16) 0.85 (0.66–1.09)

Perinatal traditions and postnatal CMD

Sociocultural attitudes scale

In the univariate analysis, scores on the sociocultural attitudes scale were not associated with incident postnatal CMD (OR = 1.11, 95% CI 0.87–1.40; Table 3). When adjusting for groups of confounders, there was evidence of negative confounding by socioeconomic status, gender disadvantage and antenatal CMD symptoms but the association remained marginally non-significant (adjusted OR = 1.36, 95% CI 0.99–1.86). In contrast, higher sociocultural attitudes scores were protective against persistence of antenatal CMD into the postnatal period in both the crude (OR = 0.81, 95% CI 0.64–1.02) and fully adjusted (adjusted OR = 0.66, 95% CI 0.45–0.95) analyses (Table 4).

Table 3 Adjusted odds ratio for association between (a) antenatal sociocultural attitudes scale, (b) discordant protective and (c) discordant celebratory perinatal practice scales, and incident postnatal common mental disorder (CMD)

Odds ratio (95%CI)
Odds ratio for incident postnatal CMD Sociocultural attitudes scale Discordant protective scale Discordant celebratory scale
Crude odds ratio 1.11 (0.87–1.40) 1.84 (1.15–2.96) 0.87 (0.43–1.75)
Adjusted separately for each set of potential confounders
    Maternal characteristics 1.10 (0.87–1.40) 1.85 (1.15–2.98) 0.84 (0.41–1.71)
    No parental formal education 1.11 (0.87–1.41) 1.84 (1.15–2.96) 0.86 (0.42–1.75)
    Poor socioeconomic status 1.16 (0.91–1.48) 1.83 (1.11–3.02) 0.79 (0.38–1.63)
    Gender disadvantage 1.17 (0.91–1.51) 1.98 (1.21–3.25) 0.84 (0.41–1.72)
    Antenatal CMD score 1.14 (0.90–1.45) 2.00 (1.22–3.26) 0.83 (0.41–1.67)
    Poor social support 1.12 (0.88–1.43) 2.00 (1.21–3.30) 0.94 (0.46–1.89)
    Poorer marital relationship 1.86 (1.16–2.98) 0.86 (0.42–1.74)
    Antenatal maternal body mass index, kg/m2 1.91 (1.18–3.09) 0.90 (0.45–1.82)
    Maternal ill health 1.81 (1.10–2.98) 0.78 (0.38–1.59)
    Baby's gender 1.84 (1.14–2.95) 0.86 (0.43–1.74)
Fully adjusted odds ratioa 1.36 (0.99–1.86) 2.16 (1.11–4.23) 0.78 (0.35–1.76)

Table 4 Adjusted odds ratios for association between (a) antenatal sociocultural attitudes scale, (b) discordant protective and (c) discordant celebratory perinatal practice scales, and persistent perinatal common mental disorder (CMD)

Odds ratio (95%CI)
Odds ratio for persistent postnatal CMD Sociocultural attitudes scale Discordant protective scale Discordant celebratory scale
Crude odds ratio 0.81 (0.64–1.02) 2.08 (1.02–4.24) 2.42 (1.20–4.88)
Adjusted separately for each set of potential confounders
    Maternal characteristics 0.81 (0.64–1.02) 2.01 (0.97–4.14) 2.41 (1.16–4.99)
    No parental formal education 0.80 (0.63–1.02) 2.21 (1.07–4.57) 2.56 (1.26–5.22)
    Poor socioeconomic status 0.76 (0.58–0.99) 3.09 (1.30–7.33) 2.80 (1.31–6.00)
    Gender disadvantage 0.81 (0.63–1.04) 1.82 (0.87–3.84) 2.37 (1.10–5.09)
    Antenatal CMD score 0.81 (0.63–1.03) 1.83 (0.86–3.88) 2.22 (1.08–4.56)
    Poor social support 0.80 (0.62–1.02) 2.44 (1.09–5.45) 2.32 (1.13–4.78)
    Poor marital relationship 2.08 (1.01–4.26) 2.48 (1.20–5.15)
    Antenatal maternal body mass index, kg/m2 1.89 (0.92–3.89) 2.56 (1.25–5.25)
    Maternal ill health 2.06 (0.98–4.32) 2.70 (1.25–5.82)
    Baby's gender 1.82 (0.87–3.81) 2.60 (1.23–5.50)
Fully adjusted odds ratioa 0.66 (0.45–0.95) 4.26 (0.80–22.67) 7.26 (1.38–38.04)

Discordant protective scale

Women with higher scores on the discordant protective scale, indicating that they were unable to complete protective practices that had been endorsed antenatally, were more likely to have both incident (OR = 1.84, 95% CI 1.15–2.96) and persistent (OR = 2.08, 95% CI 1.02–4.24) postnatal CMD in the univariate analyses. In the final fully adjusted model, higher levels of discordance for protective practices remained significantly associated with incident CMD (adjusted OR = 2.16, 95% CI 1.11–4.23) but not persistent (adjusted OR = 4.26, 95% CI 0.80–22.67) postnatal CMD. The latter appeared to be negatively confounded by gender disadvantage, maternal ill health and obstetric complications.

Discordant celebratory scale

Higher levels of discordance for celebratory practices were associated with persistent perinatal CMD in both the crude (OR = 2.42, 95% CI 1.20–4.88) and fully adjusted (adjusted OR = 7.26, 95% CI 1.38–38.04) analyses. There was no association with incident postnatal CMD.

Discussion

Building on findings from our qualitative study, we set out to investigate the relationship between perinatal sociocultural practices and onset or persistence of postnatal CMD in a large, population-based cohort in rural Ethiopia. With regard to our first hypothesis, more positive antenatal attitudes towards perinatal practices were not associated with a lower incidence of postnatal CMD. Expressing more traditional sociocultural attitudes was, however, associated with lower odds of antenatal CMD persisting into the postnatal period. In keeping with the second hypothesis, women who endorsed protective practices antenatally but did not complete them postnatally had a twofold increase in the odds of incident postnatal CMD. Likewise, women who endorsed celebratory practices but did not carry them out had a sevenfold increase in the odds of antenatal CMD persisting into the postnatal period.

Sociocultural attitudes and discordant practices

Not all of the maternal characteristics associated with endorsement of traditional attitudes were as expected. Higher scores on the sociocultural attitudes scale were associated with lower perception of poor social support. The inverse association between high traditional attitude and indebtedness might be as a result of a prohibition against borrowing money among more traditional women, although it could also reflect the relative lack of opportunity for poorer women to borrow money. The negative association with non-consenting marriage might indicate that traditional structures have a role to play in protecting women, although an alternative explanation is reporting bias because of the reluctance of more traditional women to discuss their marital status. Even though the qualitative study included stakeholders from all the major religions present in Butajira, the sociocultural practices chosen for inclusion in our questionnaire may have biased towards those favoured by the majority religion: Islam.

Discordance between antenatal attitudes towards celebratory postnatal practices, namely receiving gifts and the husband slaughtering an animal, were associated with a number of indicators of poor socioeconomic status, marital discord and gender disadvantage. As these postnatal practices depend on wealth and the cooperation of the woman's husband this is perhaps not surprising. Likewise the absence of any association between discordance for protective postnatal practices and the variables under consideration is understandable. Even without the support of her husband or the need for expenditure, most postnatal women would have been able to complete the practices of carrying metal, speaking softly and avoiding draughts of air, if minded to do so.

Hypothesis 1: sociocultural attitudes and postnatal CMD

Contrary to our hypothesis, there was no protective effect of traditional attitudes on incident postnatal CMD. Indeed, the trend was in the opposite direction (OR = 1.36, 95% CI 0.99–1.86). From our previous qualitative work, Reference Hanlon, Whitley, Wondimagegn, Alem and Prince10 participants identified that adhering to postnatal confinement and other sociocultural practices might be associated with mental ill health if coupled with poverty and gender disadvantage, for example, by confining a woman to an abusive home and separating her from potential sources of support. In pregnancy, women have more freedom to meet with others and earn small amounts of money, whereas postnatally they become dependent on their husband and immediate family (usually in-laws) to meet their needs. Any mental health benefits of a more traditional outlook expressed in pregnancy might therefore be offset by the negative impact of postnatal restrictions.

The small number of postnatal cases of CMD may have limited the power of the study to find a true association with incident postnatal CMD. An alternative explanation for the difference in associations with incident and persistent postnatal CMD could relate to the nature of antenatal CMD. In our previous qualitative work, threats to mental health in pregnancy were reported by participants as largely relating to fear of childbirth and the physical burden of pregnancy in women weakened by poverty and ill health. Reference Hanlon, Whitley, Wondimagegn, Alem and Prince20 This may explain our observation that most women with high antenatal CMD symptoms remitted postnatally (78.6%). This high remission rate for antenatal CMD is very similar to that identified in Nigeria Reference Aderibigbe, Gureje and Omigbodun21 and Uganda. Reference Cox22 Having safely negotiated childbirth, more traditionally minded women who had experienced high levels of CMD symptoms in pregnancy may have better psychological adjustment to the demands of the postnatal period, leading to remission of symptoms. The perception of better social support in more traditional women may be an important factor.

Hypothesis 2: discordant perinatal practices and postnatal CMD

Discordance between endorsing protective practices antenatally and carrying them out postnatally was associated with increased odds of both incident and persistent postnatal CMD, but for persistent CMD the association was only seen in the univariate analysis. In the fully adjusted model, the size of the adjusted odds ratio actually increased but the confidence interval became very wide, indicating that we were underpowered to detect an effect. Discordance for celebratory practices was only associated with persistent postnatal CMD. Negative recall bias cannot be excluded as an explanation for the association with postnatal CMD. Furthermore, we cannot rule out reverse causality, that women with postnatal CMD were less likely to complete postnatal practices and not vice versa.

Few studies have previously attempted to take into account women's attitudes towards postnatal practices, Reference Matthey, Panasetis and Barnett23,Reference Chee, Lee, Chong, Tan, Ng and Fones24 and we were unable to find any other studies that had prospectively explored this issue. Chee et al Reference Chee, Lee, Chong, Tan, Ng and Fones24 reported that Singaporean women who reported a negative confinement experience were more likely to be postnatally depressed, but this may have been because of negative recall bias in the women with depression. In Chinese migrants to Australia, 18% of women expressed ambivalence about carrying out postnatal practices but the sample size was too small to meaningfully examine the association with postnatal depression. Reference Matthey, Panasetis and Barnett23

Our measure of discordance approximates to Dressler's concept of cultural dissonance. Individuals are said to be culturally consonant if their own behaviours approximate widely shared cultural models. Reference Dressler, Baleiro, Ribeiro and dos Santos25 When the individual is unable to adhere to these cultural values, for whatever reason, cultural dissonance results and has been shown to be associated with poorer health outcomes, including depression. Reference Dressler, Balieiro, Ribeiro and dos Santos26 The greater the consensus in a cultural domain, the more strongly cultural dissonance is said to favour development of depression. Reference Dressler, Baleiro, Ribeiro and dos Santos25 This may partly explain the less robust association with postnatal CMD arising from discordance for celebratory rather than protective practices. The celebratory practice scale included slaughtering an animal in celebration. This item was, however, the most commonly non-completed postnatal practice (41.8%), probably because of the prohibitive cost for this population. Women's expectations of an animal actually being slaughtered in celebration of birth may therefore have been lower, even though they endorsed this as a desirable tradition. An ethnographic study from Fiji suggests another possible interpretation. Reference Becker27 The postnatal sociosomatic syndrome of na tadoka ni vasucu is conceptualised as embodying any affront to the social and moral order that holds dear the need for extra care for vulnerable postnatal women. In Fiji, identification of the disorder provoked a social reaction, with, for example, additional support and care mobilised in order to rectify the breach. The latter was not evident in Ethiopia. Further qualitative work has been carried out with the purpose of understanding conceptualisations of postnatal CMD in Ethiopia and will hopefully shed light on these findings.

In our study it was not just those postnatal rituals that mobilise care and support that seemed important for mental health in the Butajira setting. Even after adjusting for women's perceptions of poor social support from family, friends (and neighbours) and their husband, discordance for protective practices that relied on individual actions alone and for celebrations of her role transition remained associated with poorer postnatal mental health. This is in contrast to the findings in Hong Kong women Reference Lee, Yip, Leung and Chung5 where the association between completing the traditional period of confinement, peiyue, and postnatal depression became non-significant after adjusting for relationship difficulties with the mother-in-law.

Prevalence of perinatal CMD

The SRQ–20 has been shown to be a valid measure of postnatal CMD in Ghana, Reference Weobong, Akpalu, Doku, Owusu-Agyei, Hurt and Kirkwood28 Malawi Reference Stewart, Kauye, Umar, Vokhiwa, Bunn and Fitzgerald29 and Ethiopia. Reference Hanlon, Medhin, Alem, Araya, Abdulahi and Hughes18 Although the moderate sensitivity and specificity of the SRQ–20 for detection of postnatal CMD raise the possibility of misclassification, the cut-off of 6 or more was lower than that used in most previous Ethiopian studies making under-ascertainment less likely. Reference Alem, Kebede, Woldesemiat, Jacobsson and Kullgren17

Although our prevalence estimate for postnatal CMD was lower than anticipated, it is difficult to know whether this is atypical for a rural African setting because of the dearth of comparable studies. We were only able to identify one population-based rural study, from Ghana, where the prevalence of postnatal CMD was 9.6%. Reference Weobong, Akpalu, Doku, Owusu-Agyei, Hurt and Kirkwood28 Two other community-based studies were conducted in urban South Africa: in a settlement characterised by high levels of violence, the prevalence of DSM–IV-defined depressive disorder was 34.7%; Reference Cooper, Tomlinson, Swartz, Woolgar, Murray and Molteno30 in another urban setting using a CMD symptom scale, the prevalence was 16.4%. Reference Ramchandani, Richter, Stein and Norris31 Among clinic-based studies of postnatal CMD in sub-Saharan Africa, three studies give comparable estimates of prevalence to our study: 6.1% in Nigeria, Reference Adewunmi32 3.5% in Zambia Reference Collin, Chisegna, Kasonka, Haworth, Young and Filteu33 and 6.1% in Uganda. Reference Nakku, Nakasi and Mirembe34 The low prevalence of postnatal CMD in rural Ethiopia may reflect the high level of endorsement and adherence to sociocultural perinatal practices observed in our study.

Implications

Butajira is a rural Ethiopian society in transition, with increasing out-migration of the labour force, changing economic opportunities and improving connections to the capital city. Reference Berhane, Gossaye, Emmelin and Hogberg35 The ability of women to adhere to widely endorsed sociocultural practices could be being undermined by socioeconomic exigencies and gender disadvantage. Reference Berhane, Gossaye, Emmelin and Hogberg35,Reference Garcia-Moreno, Jansen, Ellsberg, Heise and Watts36 Our study indicates that such changes may be detrimental to women's postnatal mental health.

Acknowledgements

The authors gratefully acknowledge all the women who gave up their time to participate in this study, and for all assistance received from the staff of the Butajira Rural Health Programme.

Footnotes

This study was funded through a Wellcome Trust research training fellowship for C.H. (GR071643).

Declaration of interest

None.

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Figure 0

Table 1 Frequency distribution of endorsed and non-completed perinatal sociocultural practices

Figure 1

Fig. 1 Flow diagram of follow-up between pregnancy and 2-month postnatal time point for subcohorts 1 and 2 of the Perinatal Maternal Mental health in Ethiopia (P-MaMiE) cohort.CMD, common mental disorder.Subcohort 1: antenatal Self-Reporting Questionnaire (SRQ–20) ≥6;Subcohort 2: antenatal SRQ–20 <6. CMD, common mental disorders.

Figure 2

Table 2 Univariate proportional odds regression analysis of associations between potential confounders and score on the discordant protective and discordant celebratory scales

Figure 3

Table 3 Adjusted odds ratio for association between (a) antenatal sociocultural attitudes scale, (b) discordant protective and (c) discordant celebratory perinatal practice scales, and incident postnatal common mental disorder (CMD)

Figure 4

Table 4 Adjusted odds ratios for association between (a) antenatal sociocultural attitudes scale, (b) discordant protective and (c) discordant celebratory perinatal practice scales, and persistent perinatal common mental disorder (CMD)

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