Examining preventive occupational health and safety management in the Swedish welfare sector–questionnaire development, its validity and reliability, and initial findings on employers’ knowledge

Introduction: A preventive approach to occupational health and safety management (OHSM) can improve working conditions, but more knowledge is needed on how this should be organised in practice. Here, we describe the development, validity and reliability of a questionnaire used to examine employers’ preventive OHSM within the Swedish welfare sector. Furthermore, employers’ knowledge of preventive OHSM was explored using the survey data. Material and methods: A questionnaire was developed based on interviews with key actors (n = 7), experts (n = 6) and intended respondents (n = 5). Using the final questionnaire, 197 responses were collected from employer (n = 126) and employee representatives (n = 71) and used to assess the validity and reliability of the questionnaire. Qualitative and quantitative analyses of open-ended and multi-choice items were used to assess the response distribution, content validity and interrater reliability (i.e. employer-employee correspondence from 32 matched pairs from the same workplace). Quantitative and qualitative analyses of survey responses from employer representatives were performed to assess their knowledge of preventive OHSM. Results: The final questionnaire included 91 items covering employers’ working routines, resources and work environment economics. Qualitative analyses indicated a high content validity in the questionnaire, with a satisfactory response distribution and very small proportion of missing data on individual survey items. Overall, the interrater reliability was high (>60%), but the employer representatives generally gave more examples within different areas of the OHSM compared to the employee representatives. Most of the employer representatives (74%, n = 90) assessed that their organisation had sufficient knowledge regarding preventive OHSM but that the knowledge of work environment economics was lower. Conclusions: By combining work environment research with questionnaire design research, high validity and reliability was achieved for this questionnaire. Furthermore, the employers generally perceived that they have high knowledge of preventive OHSM but that more knowledge is needed on work environment economics.