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Participation bias ...
Participation bias in longitudinal studies: experience from the Population Study of Women in Gothenburg, Sweden
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- Lissner, Lauren, 1956 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för samhällsmedicin, Avdelningen för allmänmedicin,Institute of Community Medicine, Dept of Primary Health Care
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- Skoog, Ingmar, 1954 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för klinisk neurovetenskap,Institute of Clinical Neurosciences
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Andersson, K (author)
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Beckman, N (author)
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- Sundh, Valter, 1950 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för samhällsmedicin, Avdelningen för allmänmedicin,Institute of Community Medicine, Dept of Primary Health Care
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- Waern, Margda, 1955 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för klinisk neurovetenskap, Sektionen för psykiatri,Institute of Clinical Neurosciences, Section of Psychiatry
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- Zylberstein, Dimitri, 1951 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för samhällsmedicin, Avdelningen för allmänmedicin,Institute of Community Medicine, Dept of Primary Health Care
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- Bengtsson, Calle, 1934 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för samhällsmedicin, Avdelningen för allmänmedicin,Institute of Community Medicine, Dept of Primary Health Care
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- Björkelund, Cecilia, 1948 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för samhällsmedicin, Avdelningen för allmänmedicin,Institute of Community Medicine, Dept of Primary Health Care
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(creator_code:org_t)
- 2003
- 2003
- English.
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In: Scandinavian Journal of Primary Health Care. ; 21, s. 242-247
- Related links:
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https://gup.ub.gu.se...
Abstract
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- Department of Primary Health Care, Sahlgrenska Academy at Göteborg University, Göteborg, Sweden. lauren.lissner@medfak.gu.se OBJECTIVE: To describe a cohort study of women receiving a series of comprehensive health examinations over 32 years. DESIGN: Longitudinal population study based on a randomised sample of the female population from defined age cohorts. SETTING: City of Göteborg, Sweden. SUBJECTS: Subjects were 38, 46, 50, 54 or 60 years old at the start of the study in 1968. Re-examinations were performed in 1974, 1982 and 1992. Non-participants in the most recent examination, initiated in 2000, were offered home visits. MAIN OUTCOME MEASURES: Participation, anthropometric and blood pressure changes. RESULTS: At the end of the 32-year follow-up, 64% of the original participants were alive, and low participation among survivors was a problem. An acceptable participation rate (71% of those alive) was obtained after home visits were offered. Surviving non-participants already had elevated cardiovascular risk factors at onset of the study in 1968, along with lower educational level and lower socioeconomic status. Home visited subjects were similar to non-participants with regard to anthropometry and blood pressure, but did not differ from participants with regard to social indicators. Thirty-two-year longitudinal data demonstrate clear ageing effects for several important variables, which should, however, be considered in the context of documented differences with non-participants at the baseline examination. CONCLUSIONS: Longitudinal studies in elderly populations provide important data on changes during the ageing process. However, participation rates decline for a number of reasons and generalisations should be made with care. Moreover, including home visits in the protocol can both increase participation and reduce participation bias in elderly cohorts. PMID: 14695076 [PubMed - indexed for MEDLINE]
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Public Health, Global Health, Social Medicine and Epidemiology (hsv//eng)
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- ref (subject category)
- art (subject category)
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Lissner, Lauren, ...
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Skoog, Ingmar, 1 ...
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Andersson, K
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Beckman, N
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Sundh, Valter, 1 ...
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Waern, Margda, 1 ...
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Zylberstein, Dim ...
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Bengtsson, Calle ...
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Björkelund, Ceci ...
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University of Gothenburg