Regional differences in the validity of self-reported use of health care in Belgium: selection versus reporting bias

Background: The Health Care Module of the European Health Interview Survey (EHIS) is aimed to obtain comparable information on the use of inpatient and ambulatory care in all EU member states. In this study we assessed the validity of self-reported information on the use of health care, collected through this instrument, in the Belgian Health Interview Survey (BHIS), and explored the impact of selection and reporting bias on the validity of regional differences in health care use observed in the BHIS. Methods: To assess reporting bias, self-reported BHIS 2008 data were linked with register-bas... Mehr ...