Preventing healthcare-associated infection in Switzerland: Results of a national survey

We assessed infection prevention in Swiss hospitals via a national survey focusing on infection prevention practices prior to a large national infection prevention initiative. Of the 59 hospitals that responded (77%), 98% had infection prevention teams and 40% very good or excellent leadership support. However, a minority of hospitals used recommended infection prevention practices and surveillance systems regularly.

Healthcare-associated infection (HAI) is a major concern worldwide. In Europe an estimated 3.4 million patients are affected by HAI annually. 1 The Federal Offices of Public Health and the Swiss Center for Infection Prevention Swissnoso are currently leading a national program, "NOSO Strategy" (https://www.bag.admin.ch/ bag/en/home/strategie-und-politik/nationale-gesundheitsstrategien/ strategie-noso-spital-und-pflegeheiminfektionen/ueber-die-strategie. html), to reduce infection risk in the Swiss healthcare system through governance, monitoring, prevention, education, and research.
Catheter-associated urinary tract infection (CAUTI), ventilatorassociated pneumonia (VAP), central-line-associated bloodstream infection (CLABSI), and surgical site infection (SSI) are prime targets for most infection prevention programs because invasive procedures represent modifiable risk factors. Additionally, Clostridioides difficile infection (CDI) has caused repeated outbreaks in hospitals globally, and organizational culture is an important precondition for successful implementation of good infection prevention practice. 2 We investigated the status of structural, procedural, and cultural aspects of infection prevention in Swiss midsize-to-large acute-care hospitals prior to the rollout of the NOSO Strategy.
Data were collected using a questionnaire developed by Saint et al 3 that covers general hospital characteristics, infection prevention policies, infection prevention staffing, and use of specific practices related to surveillance and prevention of CAUTI, CLABSI, VAP, and CDI. The survey was translated to German, French, and Italian, and was pretested by infection prevention specialists for the final online version (Survey Monkey, San Mateo, CA).
Descriptive statistics, N (%) for categorical variables, and mean (±SD) or median (range) for continuous variables were calculated for hospital characteristics and specific infection prevention practices using SAS version 9.4 software (SAS Institute, Cary, NC) and Stata/SE version 14.2 software for Mac (StataCorp, College Station, TX). The 2 affirmative values of incremental rating scales were expressed as proportions of positive answers. "Don't know" was recoded as negative. Missing answers were excluded.
According to the Swiss law on research on humans, ethics approval was waived. Responses remained confidential.

Culture
Although most respondents (48 of 58, 83%) felt that hospital leadership encouraged putting patient safety at the center of efforts, only 23 of 58 (40%) reported having very good or excellent support from hospital leadership for infection prevention ( Supplementary  Fig. 1 online).

Surveillance
Surveillance varied considerably by HAI type and hospital (Fig. 2). Local surveillance schemes for at least 1 HAI were reported by 34 of 59 hospitals (58%). Repeated HAI prevalence surveys were performed in 16 of 59 hospitals (27%). SSI surveillance was almost universal through the national surveillance scheme 57 of 59 hospitals (97%). Hospital-acquired pneumonia was surveilled in 7 of 59 hospitals (12%).
Applying multivariable models, we found no relevant correlations between staffing levels, leadership support, and perceived importance of HAI prevention with various infection prevention practices and monitoring activities (data not shown). The line graphs represent the use of preventive practices. Lines represent the level of practice; dots represent the perception of the supporting evidence; diamonds represent the evidence form authoritative infection prevention guidelines. A high level of evidence appears at 100%, moderate level at 75%, and a low level at 50% (for references, see the text). For prevention practices, 5-point scales from "never" to "always" were transformed into a dichotomous variable recoding "almost always" and "always" as 1 ("yes") and the remainder as 0 ("no"). Missing answers and "don't know" were excluded from the calculation of proportions. Note. C. difficile, Clostridioides difficile. *Not recommended practice. **No evidence level reported in guidelines.

Discussion
We conducted a comprehensive, national survey of Swiss acutecare hospitals to ascertain the state of infection prevention structure, practices, and organizational culture to prevent the most common HAIs prior to the rollout of a national infection prevention program.
Our study has several main findings. First, almost all Swiss general acute care hospitals had an infection prevention practitioner or team and infection prevention policies. However, the staffing of infection prevention teams in most hospitals did not meet the latest international recommendations. [4][5][6][7] Second, perceived hospital leadership support for infection prevention was modest in most hospitals. Third, only a minority of hospitals sustained surveillance systems for HAI. Finally, specific prevention practices were implemented to varying degrees, being low for CAUTI and higher for CDI prevention.
Similar versions of the questionnaire 3 distributed in the present survey have been distributed in other countries. A random sample of 900 US acute-care hospitals reported higher use of most prevention practices than Switzerland. In contrast to this study, the perceived importance of preventing specific HAIs and the certification status of the infection prevention leader were significantly associated with the use of prevention practices in US hospitals. 3 Findings among Thai and Japanese hospitals suggested that increased organizational commitment toward safety culture and participating in infection prevention collaborative networks contribute to improvements in HAI prevention. 8,9 In line with our findings, a European survey among 309 hospitals found that most hospitals featured CLABSI surveillance. 10 Importantly, we identified a gap between perceived solid evidence to support many CAUTI prevention practices, especially system-level elements (eg, catheters reminders and nurse-initiated stop orders and use of alternative catheterization), consistent with low perceived awareness of CAUTI by hospital leadership.
However, perceived strength of evidence for many practices mismatched the guideline-reported strength of evidence but matched actual use, a correlation found by others. 11 This finding might just reflect the lacunar nature of research against common sense, demonstrated by aseptic technique during urinary and central-line insertion, for which the actual evidence is low 6 to moderate 4 although it was perceived as being high and was followed by a high level of use.
Whereas respondents perceived high levels of encouragement for patient safety, they felt less confident that their colleagues would be open to changes or that it would be easy to implement evidence-based guidelines. Perhaps most notably, only a minority felt that leadership support for infection prevention was very good to excellent. We also found that the level of perceived leadership interest did not always match the application of practices.
Our study has limitations. First, survey findings depend on the person responding. We sought to mitigate this by asking the respondent to crosscheck their opinions with knowledgeable colleagues. Second, surgical site infections and other infection prevention topics were not covered in this survey, as we kept the number of survey questions manageable in favor of a high return rate.
In conclusion, this comprehensive survey of infection prevention structure, practices, and organizational culture revealed a need for better infection prevention staffing in most Swiss acute-care hospitals and increased application of evidenced-based infection prevention practices and surveillance; this was especially so for CAUTI prevention. Although the presence of infection prevention teams and patient safety culture were rated relatively high, support for infection prevention by hospital leadership can likely be improved. The Swiss national infection prevention program will ideally address the specific hospital-level deficiencies noted in this national survey.