To the top

Page Manager: Webmaster
Last update: 9/11/2012 3:13 PM

Tell a friend about this page
Print version

Registry-based analysis o… - University of Gothenburg, Sweden Till startsida
To content Read more about how we use cookies on

Contact form


Note! If you want an answer on a question you must specify your email address

Registry-based analysis of participator representativeness: A source of concern for sickness absence research?

Journal article
Authors Marit Knapstad
Jesper Löve
Kristina Holmgren
Gunnel Hensing
Simon Øverland
Published in BMJ Open
Volume 6
Publication year 2016
Published at Institute of Medicine, School of Public Health and Community Medicine
Language en
Subject categories Public Health, Global Health, Social Medicine and Epidemiology


© BMJ Publishing Group Limited 2016.Objectives: Selective participation can bias results in epidemiological surveys. The importance of health status is often suggested as a possible explanation for non-participation but few empirical studies exist. In a population-based study, explicitly focused on sickness absence, health and work, we examined whether a history of high levels of sickness absence was associated with non-participation. Design: The study is based on data from official sickness absence registers from participants, non-participants and the total target population of the baseline survey of the Health Assets Project (HAP). Setting: HAP is a population-based cohort study in the Västra Götaland region in South Western Sweden. Participants: HAP included a random population cohort (n=7984) and 2 cohorts with recent sickness absence (employees (n=6140) and non-employees (n=990)), extracted from the same overall general working-age population. Primary outcome measures: We examined differences in participation rates between cohorts (2008), and differences in previous sickness absence (2001-2008) between participants (individual-level data) and non-participants or the target population (group-level data) within cohorts. Results: Participants had statistically significant less registered sickness absence in the past than nonparticipants and the target population for some, but not all, of the years analysed. Yet these differences were not of substantial size. Other factors than sickness absence were more important in explaining differences in participation, whereby participants were more likely to be women, older, born in Nordic countries, married and have higher incomes than non-participants. Conclusions: Although specifically addressing sickness absence, having such experience did not add any substantial layer to selective participation in the present survey. Detailed measures are needed to gain a better understanding for health selection in healthrelated surveys such as those addressing sickness absence, for instance in order to discriminate between selection due to ability or motivation for participation.

Page Manager: Webmaster|Last update: 9/11/2012

The University of Gothenburg uses cookies to provide you with the best possible user experience. By continuing on this website, you approve of our use of cookies.  What are cookies?