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Int. J. Environ. Res. Public Health 2010, 7(1), 325-332; doi:10.3390/ijerph7010325

To Match or Not to Match in Epidemiological Studies—Same Outcome but Less Power

Department of Medical and Health Sciences, Community Medicine, Linköping University, SE-58183 Linköping, Sweden
Author to whom correspondence should be addressed.
Received: 8 December 2009 / Accepted: 22 January 2010 / Published: 26 January 2010
(This article belongs to the Special Issue Advances in Epidemiology)
View Full-Text   |   Download PDF [164 KB, uploaded 19 June 2014]


This study aimed to analyze the possible resemblance or difference in outcome in a case-control study of quality of life for IBS patients compared to controls free from the disease, when a matching procedure for age and sex was applied for the control group compared to when all participating subjects were included in the control group. The main result was that almost the same and identical results were found irrespective of whether matching or not matching was applied in this epidemiological case-control study. The matching procedure however, slightly diminished the statistical power of the results. View Full-Text
Keywords: epidemiology; matching; case-control study; gender epidemiology; matching; case-control study; gender
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Faresjö, T.; Faresjö, Å. To Match or Not to Match in Epidemiological Studies—Same Outcome but Less Power. Int. J. Environ. Res. Public Health 2010, 7, 325-332.

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