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About the Irish Universities Nutrition Alliance
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- 03 July 2008, pp. 1025-1026
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Introduction
The North/South Ireland Food Consumption Survey
- JJ Strain
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- 03 July 2008, pp. 1027-1028
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Research Article
Sampling description and procedures used to conduct the North/South Ireland Food Consumption Survey
- M Kiely, A Flynn, KE Harrington, PJ Robson, G Cran
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- 03 July 2008, pp. 1029-1035
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Objective
The purpose of this survey was to establish a database of habitual food and drink consumption in a representative sample of Irish adults, aged 18–64 years. The present paper describes the sampling protocol, response rate and characteristics of the survey population in terms of sex and age groups, seasonality, geographical location, marital status, social class, socio-economic status and education level.
DesignA cross-sectional food consumption survey was carried out. In the Republic of Ireland, a nationally representative sample of adults was randomly selected with a validated two-stage clustered design, using the electoral register as the sampling frame. This method produced a self-weighting or ‘epsem’ sample of individuals, where each adult who was registered to vote had an equal opportunity of being selected. Similarly, in Northern Ireland, a two-stage random sampling procedure was used. The sampling frame was the electoral register, and the sample was stratified by urban/rural and by an index of material deprivation, to ensure representation of each sector of the community. The recruitment procedure was the same in the North and South. An introductory letter with an information leaflet was posted to each selected individual and these were followed up by a visit from a fieldworker, who invited participation in the survey.
SettingNorthern Ireland and Republic of Ireland between 1997 and 1999.
ResultsThe response rate, which is the percentage of the total number of people who completed a 7-day food diary (n = 1379) out of the total eligible sample (n = 2177), was 63%. Non-respondents and dropouts constituted 34% and 3%, respectively, of the total eligible sample. Compared with the most recent census figures available, the sample was generally found to be representative in terms of sex and age group profiles, geographical location, marital status, seasonality, social class, socio-economic group and education level. Data on sex and age group and geographical location were collected from non-respondents for comparison with the survey sample. There were no apparent differences between them.
ConclusionThe North/South Ireland Food Consumption Survey has established a Samplino relational database of habitual food and drink consumption, in addition to data on Response rate habitual physical activity, anthropometric measurements, socio-demographic factors, Demographics lifestyle, health status indicators and attitudes, in a nationally representative sample Socio-economic factors of the population of the island of Ireland.
The North/South Ireland Food Consumption Survey: survey design and methodology
- KE Harrington, PJ Robson, M Kiely, MBE Livingstone, J Lambe, MJ Gibney
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- 03 July 2008, pp. 1037-1042
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Objective
The purpose of this survey was to establish a database of habitual food and drink consumption in a representative sample of Irish adults aged 18-64 years.
DesignA cross-sectional food consumption survey was carried out. Food intake data were collected using a 7-day estimated food diary. Anthropometric data included measurements of weight, height, waist and hip circumferences and body composition using bioelectrical impedance analysis. Questionnaire data included assessments of health, lifestyle and socio-demographic status, levels of physical activity, attitudes to diet and health and restrained eating.
SettingNorthern Ireland and Republic of Ireland between 1997 and 1999.
ResultsIn total, 1379 adults aged 18–64 years participated in the survey and completed the 7-day food diary. This paper gives details of the methods used to carry out the survey. Sampling, respondent recruitment, dietary assessment, collection of anthropometric and questionnaire data and data management and analysis are described.
ConclusionThe North/South Ireland Food Consumption Survey is unique in being the first food consumption survey ever to be carried out in the Republic of Ireland and Northern Ireland concurrently using the same methodology.
An evaluation of energy intakes and the ratio of energy intake to estimated basal metabolic rate (EI/BMRest) in the North/South Ireland Food Consumption Survey
- MJ McGowan, KE Harrington, M Kiely, PJ Robson, MBE Livingstone, MJ Gibney
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- 03 July 2008, pp. 1043-1050
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Objective
To examine energy intakes (El), their ratio to estimated basal metabolic rate (BMRest) and the contribution of food groups to energy intake in the North/South Ireland Food Consumption Survey.
Design and settingRandom sample of adults from the populations of Northern Ireland and the Republic of Ireland. Food intake data were collected using a 7-day food diary. Body weight and height were measured and EI/BMRest was calculated from reported energy intake and estimated basal metabolic rate. Dieting practices were assessed as part of a self-administered questionnaire.
ResultsMean energy intake in men was 11.0 MJ and in women was 7.6 MJ, which is comparable to reported energy intakes in Northern Ireland and the Republic of Ireland over a decade ago. Mean EI/BMRest was 1.38. This increased to 1.42 after the exclusion of dieters and those who were unwell, but still remained less than the established cut-off of 1.53. EI/BMRest was significantly (P < 0.05) higher in men than in women and decreased significantly (P < 0.05) with increasing BMI in both sexes. The four food groups that contributed 50% of energy in men and women were meat and meat products, breads and rolls, potatoes and potato products, and biscuits, cakes, pastries and puddings.
ConclusionsEnergy intakes have not changed remarkably in Northern Ireland or the Republic of Ireland in the last 10 years, but the mean EI/BMRest of 1.38 suggests that energy underreporting occurred. EI/BMRest was lower in women and in the overweight/obese. Additional multivariate analysis of the data is needed to identify more clearly subgroups of the population reporting lower than expected energy intakes and to evaluate the effect of low energy reporting on the consumption of various foods and food groups.
Macronutrient intakes and food sources in Irish adults: findings of the North/South Ireland Food Consumption Survey
- KE Harrington, MJ McGowan, M Kiely, PJ Robson, MBE Livingstone, PA Morrissey, MJ Gibney
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- 03 July 2008, pp. 1051-1060
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Objective
To describe macronutrient intakes and food sources of the adult population in the Republic of Ireland and Northern Ireland and to assess adherence of this population to current dietary recommendations.
DesignA cross-sectional food consumption survey collected food intake data using a 7-day food diary.
SettingNorthern Ireland and the Republic of Ireland between October 1997 and October 1999.
SubjectsOne thousand three hundred and seventy-nine adults aged 18–64 years (662 males and 717 females).
ResultsMean daily energy intakes in men were 11 MJ per day, 15.5% was derived from protein, 34.8% from fat, 43.5% from carbohydrate and 5.9% from alcohol. Corresponding figures for women were 7.6 MJ per day, 15.6%, 35.6%, 45.1% and 3.5%. When alcohol energy was excluded the contribution of fat and carbohydrate to energy did not differ between men and women. When compared with existing dietary recommendations, 93% of men and 86% of women had protein intakes above the Population Reference Intake. Two approaches were used to assess adherence to the fat and carbohydrate dietary recommendations: (1) the proportion of individuals in the population attaining these dietary targets and (2) the proportion of the population that was included in a 'compliers' group which had a group mean equal to these dietary targets. Thirty-three per cent of men and 34% of women met the target of 35% of food energy from fat and 78% of men and 80% of women comprised the ‘compliers’ group having a group mean of 35% of food energy from fat. Twentythree per cent of men and 27% of women met the target of 50% of food energy from carbohydrate and 56% of men and 62% of women made up the 'compliers' group. Meat and meat products were the main source of fat (23%) and protein (37%), and bread and rolls (25%) were the main source of carbohydrate.
ConclusionA reduction in dietary fat intake remains an important public health issue in the Republic of Ireland and Northern Ireland. An increase in carbohydrate intake and attention to the rise in alcohol intake is also warranted.
The North/South Ireland Food Consumption Survey: the dietary fibre intake of Irish adults
- MA Galvin, M Kiely, KE Harrington, PJ Robson, R Moore, A Flynn
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- 03 July 2008, pp. 1061-1068
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Objective
Mean daily intakes of dietary fibre (DF, Southgate) and non-starch polysaccharide (NSP, Englyst) are estimated in a representative sample of adults aged 18-64 years in Ireland. The contribution of food groups to DF and NSP intake is reported and fibre intakes are compared with dietary recommendations and with intakes in some European countries.
DesignFood consumption was estimated using 7-day food diaries for a representative sample (n = 1379; 662 men, 717 women) of 18–64 year old adults in the Republic of Ireland and Northern Ireland selected from the electoral register. DF and NSP intakes were estimated from tables of food composition.
ResultsThe mean daily intake of DF in the total sample was 20.2 g (standard deviation (SD) 7.8) [23-2 g (SD 8.5) in men, 17.4 g (SD 5.9) in women] or 2.24 g MJ−1 (SD 0.7) [2.16 g MJ−1 (SD 0.7) in men, 2.33 g MJ−1 (SD 0.7) in women]. Mean daily intake of NSP was 14.8 g (SD 6.2) [16.7 g (SD 6.8) in men, 13.0 g (SD 5.0) in women] or 1.65 g MJ−1 (SD 0.6) [1.56 g MJ−1 (SD 0.6) in men, 1.74 g MJ−1 (SD 0.6) in women]. The main food groups that contributed to mean daily intake of DF (NSP) in the sample were breads 31% (23%), potatoes 19% (23%), and vegetables 17% (19%). Absolute intakes of DF and NSP were higher (P < 0.001) in men than women; however, women overall consumed more (P < 0.001) fibre-dense diets than men. Women aged 18-35 years consumed less (P < 0.01) DF and NSP (g) than women aged 36-64 years. Both men and women aged 18–35 years consumed less (P < 0.01) fibre-dense diets than men and women aged 36–64 years. The NSP intake was below the nutritional goal of 18 g day−1 in 77% of adults and below the minimum of the recommended range (12 g day−1) in 37% of the total sample. Compliance (i.e. the maximum number of individuals whose collective mean daily intake corresponded to the population goal) with the (UK) population goal for an average intake of 18 g day−1 NSP was achieved by a greater proportion of the population (63%) than compliance with the (German) dietary fibre recommendation of 30 g day−1 (27%) or the (Nordic) recommendation of 3 g MJ−1 day−1 (33%).
ConclusionDF (NSP) intakes were lower than dietary recommendations in a substantial proportion of the population. This is likely to contribute to impaired bowel function and constipation, which in turn may contribute to increased risk of chronic gastrointestinal disease.
The North/South Ireland Food Consumption Survey: vitamin intakes in 18–64-year-old adults
- MM O'Brien, M Kiely, KE Harrington, PJ Robson, JJ Strain, A Flynn
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- 03 July 2008, pp. 1069-1079
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Objective
To estimate vitamin intakes and assess the contribution of different food groups to vitamin intakes in adults aged 18–64 years in Ireland as estimated in the North/South Ireland Food Consumption Survey. Intakes are reported for retinol, carotene, total vitamin A, vitamin D, vitamin E, thiamin, riboflavin, pre-formed niacin, total niacin equivalents, vitamin B6, vitamin B12, folate, biotin, pantothenate and vitamin C. The adequacy of vitamin intakes in the population and the risk of occurrence of excessive vitamin intakes are also assessed.
DesignFood consumption was estimated using a 7-day food diary for a representative sample (n = 1379; 662 men and 717 women) of 18–64-year-old adults in the Republic of Ireland and Northern Ireland selected randomly from the electoral register. Vitamin intakes were estimated using tables of food composition.
ResultsIn general, the percentage of the population with vitamin intakes below the average requirement (AR) was low. Mean daily intake of total vitamin A was below the AR in 20.2% and 16.6% of men and women, respectively, and mean daily intake of riboflavin was below the AR in 12.5% and 20.6% of men and women, respectively. Mean daily folate intakes were below the AR for folate in 11.2% and 6.6% of women aged 18–35 years and 36–50 years, respectively. Only 2.2% of women aged 18–35 years and 52% of women aged 36–50 years achieved the recommended folate intake of 600 (μg day−1 for women of reproductive age for the prevention of neural tube defects. A high proportion of the population has a low dietary vitamin D intake and is largely dependent on sunlight exposure to maintain adequate vitamin D status. Except for pre-formed niacin, the 95th percentile intake of vitamins did not exceed the tolerable upper intake level (UL) for any group and was much less than the UL for most vitamins. Although 20.8% of men and 6.3% of women exceeded the UL for pre-formed niacin (which is 35 mg, based on nicotinic-acid-induced flushing), the large contribution of meat and fish to the intake of niacin (as nicotinamide) suggests that the risk of overexposure to nicotinic acid is much lower than this and is probably solely related to supplement use. A small proportion of men (4.0%) and women (1.2%) aged 51-64 years had retinol intakes that exceeded the UL (3000 μg) and while the 95th percentile intake of women in the 18–50 year age group was well below the UL, 1.5% of 18–35-year-old and 2.4% of 36–50-year-old women had mean daily retinol intakes above the UL. About 2.0% of women had intakes of vitamin B6 that exceeded the UL (25 mg). There were significant differences by age and sex in nutrient densities of vitamin intakes between men and women and between age groups, which may be explained by differences in consumption of particular food groups as well as different patterns of supplement use.
ConclusionNutritional adequacy of the population for most vitamins was good. Folate intake in women of childbearing age is not meeting current recommendations for the prevention of neural tube defects. The public health significance of the relatively high proportion of men and women with inadequate intakes of vitamin A and riboflavin and with low dietary intakes of vitamin D is unclear and should be investigated further. With the possible exception of niacin (flushing) and vitamin B6 (neuropathy), there appears to be little risk of the occurrence of adverse effects due to excessive consumption of vitamins in this population, based on current dietary practices.
The North/South Ireland Food Consumption Survey: mineral intakes in 18–64-year-old adults
- EM Hannon, M Kiely, KE Harrington, PJ Robson, JJ Strain, A Flynn
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- 03 July 2008, pp. 1081-1088
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Objective
To measure mineral intakes and the contribution of different food groups to mineral intakes in adults aged 18–64 years in Ireland. Intakes are reported for Ca, Mg, P, Fe, Cu and Zn. The adequacy of mineral intakes in the population and the risk of occurrence of excessive intakes are also assessed.
DesignFood consumption was estimated using a 7-day food diary for a representative sample (n = 1379; 662 men, 717 women) of 18–64-year-old adults in the Republic of Ireland and Northern Ireland selected randomly from the electoral register. Mineral intakes (Ca, Mg, P, Fe, Cu and Zn) were estimated using tables of food composition.
ResultsMean nutrient density of intakes was higher for women than men for Ca and Fe and increased with age for all minerals, except Ca for men and Fe for women. Meat and meat products were the major contributor to mean daily intakes of Zn (38%), P (23%), Fe (18%), Cu (15%) and Mg (13%); dairy products (milk, yoghurt and cheese) to Ca (44%), P (22%), Zn (14%) and Mg (11%); bread and rolls to Fe (21%), Cu (18%), Ca and Mg (17%), Zn (13%) and P (12%); potatoes and potato products to Cu (16%), Mg (14%) and Fe (10%); and breakfast cereals to Fe (13%). In women of all ages nutritional supplements contributed 7.6%, 4.4%, 3.6% and 2.2% of mean daily intake of Fe, Zn, Cu and Ca, respectively, while in men of all ages, nutritional supplements contributed 2.7%, 2.3%, 1.7% and 0.6%, respectively, to mean daily intakes of Fe, Zn, Cu and Ca. Adequacy of minerals intakes in population groups was assessed using the average requirement (AR) as a cut-off value. A significant prevalence of intakes below the AR was observed for Ca, Fe, Cu and Zn but not P. A higher proportion of women than men had intakes below the AR for all minerals. Almost 50% of 18–50-year-old females had intakes below the AR for Fe, while 23%, 23% and 15% of women of all ages had intakes below the AR for Ca, Cu and Zn, respectively. For men of all ages, 11%, 8% and 13% had intakes below the AR for Ca, Cu and Zn, respectively. There appears to be little risk of excessive intake of Ca, Mg, P, Cu or Zn in any age/sex category. However, 2.9% of women of all ages had intakes above the tolerable upper intake level for Fe (45 mg) due to supplement use.
ConclusionAlmost 50% of women aged 18–50 years had Fe intakes below the AR and relatively high proportions of women of all ages had intakes below the AR for Ca, Cu and Zn. With the possible exception of iron intake from supplements in women, there appears to be little risk of excessive intake of minerals in the adult population. Meat and meat products, dairy products (milk, cheese and yoghurt), Keywords bread and rolls, potatoes and potato products and breakfast cereals are important Mineral intake sources of minerals; nutritional supplements make only a small contribution to Ireland mineral intakes in the population as a whole but may contribute significantly to Food consumption survey intakes among supplement users.
The efficacy and safety of nutritional supplement use in a representative sample of adults in the North/South Ireland Food Consumption Survey
- M Kiely, A Flynn, KE Harrington, PJ Robson, N O'Connor, EM Hannon, MM O'Brien, S Bell, JJ Strain
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- 03 July 2008, pp. 1089-1097
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Objective
To describe the current use of nutritional supplements and their contribution to micronutrient intakes in a representative sample of Irish adults, to evaluate the impact of supplement use on the adequacy of micronutrient intakes and to assess the risk to supplement users of exceeding tolerable upper intake levels (UL).
Study design and subjectsFood intake data were collected in 1379 (662 male and 717 female) randomly selected Irish adults aged 18 to 64 years using a 7-day food diary. The current use of nutritional supplements was assessed using a selfadministered questionnaire and respondents entered each supplement as it was consumed into the food diary.
ResultsTwenty-three per cent of respondents regularly used nutritional supplements. Twice as many women used supplements as men. The intakes of micronutrients were significantly higher (P < 0.001) in supplement users than in non-users. Micronutrient intakes from food sources were similar in male users and non-users of supplements, but were significantly higher (P < 0.01) in female users, by 3 to 13%, for Fe, Mg, Mn, vitamins C and E and niacin than in non-users. The percentage of female users between 18 and 50 years who had mean Fe intakes below the average requirement (AR) (10 mg) decreased from 50 to 25 when the contribution from supplements was included. The use of supplements reduced the percentage of men who had mean intakes below the AR for Zn from 19 to 13, for riboflavin from 14 to 6 and for vitamin A from 20 to 5, and reduced the percentage of women with intakes below the AR for Ca from 23 to 16 and for riboflavin from 23 to 14. Twenty-one women out of 80 aged between 18 and 50 years, who consumed supplemental folate, achieved the intake of 600 |xg recommended to prevent neural tube defects. Twenty-two per cent of the women who took iron and 15% of the women who took vitamin B$ in supplemental form had mean daily intakes that exceeded that UL for these nutrients. Supplement users did not exceed the UL for the other micronutrients.
ConclusionsSupplementation appears to be beneficial in promoting adequate intakes of some micronutrients, particularly Fe and folate in women aged 18–50 years and vitamin A in men. There appears to be little risk to supplement users of experiencing adverse side effects due to excessive intakes of micronutrients.
Analyses of the anthropometric data from the North/South Ireland Food Consumption Survey
- SN McCarthy, KE Harrington, M Kiely, A Flynn, PJ Robson, MBE Livingstone, MJ Gibney
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- 03 July 2008, pp. 1099-1106
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Objective
To obtain measured anthropometric data for weight, height and other parameters not previously measured in the Irish population such as waist and hip circumferences and body composition.
DesignA cross-sectional survey. Weight, height, waist circumference, hip circumference and body composition were measured according to standard procedures.
SettingNorthern Ireland and the Republic of Ireland, 1997–1999.
SubjectsRandom representative sample of 1379 adults aged 18–64 years. Results: With the exception of body fat, all anthropometric values were significantly higher for men than women (P < 0.001). All measurements were significantly higher in the 36–50-year-old age group compared with 18–35 year olds. Height was the exception, which decreased significantly with age (P < 0.05). Weight, height and body mass index (BMI) have increased in Ireland since last measured in 1988 and in 1990. Over the last decade, obesity has increased in men 2.5 fold from 8% to 20% and in women by 1.25 fold from 13% to 16%. Significantly more women have a normal BMI than men (50.4% vs. 33.3%; P < 0.05). Cut-off points for a high waist circumference and high waist-to-hip ratio identified 47% and 33% of the population, respectively, to be at an increased risk for cardiovascular disease. Social class did not have any significant effect on mean BMI. Location of residence influenced BMI but not in any consistent manner. Ex-smokers had a significantly higher BMI than nonsmokers and smokers (P < 0.05).
ConclusionsA revision of current recommendations for combating obesity is warranted to improve the health of the Irish population. Further research is needed to identify the factors that have contributed to the dramatic increase in the prevalence of obesity in men over the last decade and have resulted in a higher prevalence of obesity in men than in women.
Physical activity patterns in a nationally representative sample of adults in Ireland
- MBE Livingstone, PJ Robson, S McCarthy, M Kiely, K Harrington, P Browne, M Galvin, NJ Wareham, KL Rennie
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- 03 July 2008, pp. 1107-1116
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Objective
To evaluate habitual levels of physical activity in a nationally representative sample of adults in Ireland.
DesignCross-sectional survey using a self-administered questionnaire. Usual levels of work, recreational and household activities were evaluated in relation to anthropometric, demographic and socio-economic characteristics. The amount and intensity of all activities were quantified by assigning metabolic equivalents (METS) to each activity.
SettingRepublic of Ireland and Northern Ireland, 1997–1999.
SubjectsRandom sample of 1379 adults aged 18–64 years.
ResultsMen were approximately twice as active in work and recreational activity (139.7 ± 83.9 METS) as women (68.5 ± 49.8 METS; P < 0.001), but women were three times more active in household tasks (65.9 ± 58.7 METS vs. 22.6 ± 24.6 METS; P < 0.001). Overall levels of physical activity declined with increasing age, particularly leisure activity in men. In women the decline in work activity was offset by spending more time in household pursuits. Twenty-five per cent of the subjects were extremely overweight (body mass index (BMI) > 28kg m−2) or obese (BMI > 30kg m−2). Fewer obese subjects reported higher levels of work and leisure activities. However, a higher percentage of obese women reported participation in the higher levels of household activities. Participation rates in recreational activities were low. Walking was the most important leisure activity of both men (41%) and women (60%). In terms of hours per week spent in vigorous physical activity, men were more active than women, professional and skilled non-manual women were more active than women in other social classes, and younger subjects (aged 18–35 years) were more active than older subjects.
ConclusionsThe holistic approach used in the assessment of physical activity in this study has revealed important and subtle differences in the activity patterns of men and women. Failure to fully characterise the respective activity patterns of men and women could lead to ill-informed public health policy aimed at promoting and sustaining lifetime habits of physical activity. The results suggest that simple population-focused programmes to promote physical activity are unlikely to offer the same chance of long-term success as more sensitive and individualised strategies.
Attitudes towards and beliefs about nutrition and health among a random sample of adults in the Republic of Ireland and Northern Ireland
- John M Kearney, Michael J Gibney, Barbara E Livingstone, Paula J Robson, Mairead Kiely, Karen Harrington
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- 03 July 2008, pp. 1117-1126
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Objectives
For effective healthy eating promotion, it is necessary to understand the attitudes towards and beliefs about nutrition of the general public. The objective of this study was to provide data on attitudes towards eating a healthy diet and the perceived need to alter eating habits from a random sample of adults in the Republic of Ireland and in Northern Ireland, using a self-administered questionnaire.
DesignCross-sectional survey using a self-administered attitudinal questionnaire on beliefs and attitudes to healthy eating.
SettingThe survey was carried out between October 1997 and October 1999 in the Republic of Ireland and in Northern Ireland.
SubjectsA randomly selected sample of 1256 adults from the Republic of Ireland and Northern Ireland completed the attitudinal questionnaire.
ResultsA majority of subjects (62%) perceived that they make conscious efforts to eat a healthy diet either most of the time or quite often, while just over half (52%) agreed that they do not need to make changes to their diet as it is healthy enough. Subjects most likely to make conscious efforts to try to eat a healthy diet were females, older subjects (51-64 years) and those with the highest intakes of fruit and vegetables and lowest quartile of fat (% food energy). When self-assessed adequacy of fruit and vegetables was examined, two-thirds of the total sample felt they ate too little fruit while just one-third felt they ate too little vegetables.
ConclusionResults of the present study, in general, revealed good agreement between attitude and behaviour with respect to healthy eating. This suggests that people appear to be reasonably accurate at evaluating their own diet in terms of how healthy it is. In terms of the two food groups examined in this study, some optimistic bias was evident for vegetables but not for fruit. It may be useful therefore to assess attitudes and beliefs about healthy eating by way of examining attitudes to such food groups individually.
Conclusions
The North/South Ireland Food Consumption Survey
- Albert Flynn
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- 03 July 2008, p. 1127
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