RT Journal Article SR Electronic T1 Accuracy of self-reported healthcare use in patients with osteoarthritis. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 2181 OP 2184 VO 29 IS 10 A1 Terry A Cronan A1 Heather R Walen YR 2002 UL http://www.jrheum.org/content/29/10/2181.abstract AB OBJECTIVE: To assess the accuracy of self-reports of use of healthcare services by comparing patient reports to the patients' medical records kept by the health agency. METHODS: The participants were 213 members of a large health maintenance organization (HMO) who were 60 years of age or older and had a diagnosis of osteoarthritis. Participants were asked to keep medical logs for 6 months; these data were collected after 3 and 6 months. Agency reported healthcare data were collected for the same 6 month period. RESULTS: The average number of contacts reported by the HMO was 6.42, while the average number of self-reported contacts was 3.79. The mean absolute discrepancy score between self and agency reported contacts was 3.45. More salient contacts (i.e., days in hospital) were more accurately reported than routine doctor visits, but 70% of the participants underreported their total use of the medical care system. CONCLUSION: Accurate and unbiased information is a fundamental necessity basis for making decisions about healthcare issues, and self-reports may not provide such information.