Durga S Borkar1, Vivien M Tham2, Elizabeth Shen1, John V Parker3, Aileen Uchida3, Aleli C Vinoya3, Nisha R Acharya4. 1. F.I. Proctor Foundation, University of California, San Francisco, San Francisco, California. 2. Department of Ophthalmology, Kaiser Permanente Hawaii, Honolulu, Hawaii; Pacific Vision Institute of Hawaii, Honolulu, Hawaii. 3. Center for Health Research, Kaiser Permanente Hawaii, Honolulu, Hawaii. 4. F.I. Proctor Foundation, University of California, San Francisco, San Francisco, California; Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, California; Department of Ophthalmology, University of California, San Francisco, San Francisco, California. Electronic address: nisha.acharya@ucsf.edu.
Abstract
PURPOSE: To assess whether there is a protective association between statin use and uveitis diagnosis. DESIGN: Retrospective, population-based case-control study. METHODS: Medical records of all patients in the Kaiser Permanente Hawaii health plan between January 1, 2006 and December 31, 2007 (N = 217 061) were searched electronically for International Classification of Diseases, 9th Revision, diagnosis codes related to uveitis. Chart review was done to confirm incident uveitis diagnosis during the study period. Two control groups were each randomly selected at a 5:1 ratio to cases, and controls were assigned an index date to match their respective case diagnosis date. One control group was selected from the general Kaiser Permanente Hawaii population that had at least 1 healthcare visit during the study period. Another control group was selected from the population of Kaiser Permanente Hawaii members who had at least 1 visit to the ophthalmology clinic during the study period. Statin use was defined as filling a prescription for statin medication in the year prior to the diagnosis or index date based on an electronic search of the Kaiser Permanente Hawaii pharmacy database for Generic Product Identification codes. A conditional logistic regression model with clinical diagnosis of uveitis as the outcome was used to assess the relationship between statin use and uveitis. RESULTS: One hundred eight incident cases of uveitis were identified. Nineteen percent of uveitis patients had used statin medication in the year prior to diagnosis compared to 30% of patients in the general Kaiser population control (P = .03) and 38% of patients in the ophthalmology clinic control (P < .001). Using the general Kaiser population control and adjusting for age, sex, race, and autoimmune diseases, the odds of a statin user developing uveitis were 48% less than the odds of a non-statin user developing uveitis (OR: 0.52, 95% CI: 0.29-0.94, P = .03). Similarly, the odds of developing uveitis were 33% less for statin users compared to non-statin users (OR: 0.67, 95% CI: 0.38-1.19, P = .17) when adjusting for these factors and using the ophthalmology clinic control group. CONCLUSIONS: Statin use may be protective against the development of uveitis. Several anti-inflammatory and immunomodulatory mechanisms may explain this association.
PURPOSE: To assess whether there is a protective association between statin use and uveitis diagnosis. DESIGN: Retrospective, population-based case-control study. METHODS: Medical records of all patients in the Kaiser Permanente Hawaii health plan between January 1, 2006 and December 31, 2007 (N = 217 061) were searched electronically for International Classification of Diseases, 9th Revision, diagnosis codes related to uveitis. Chart review was done to confirm incident uveitis diagnosis during the study period. Two control groups were each randomly selected at a 5:1 ratio to cases, and controls were assigned an index date to match their respective case diagnosis date. One control group was selected from the general Kaiser Permanente Hawaii population that had at least 1 healthcare visit during the study period. Another control group was selected from the population of Kaiser Permanente Hawaii members who had at least 1 visit to the ophthalmology clinic during the study period. Statin use was defined as filling a prescription for statin medication in the year prior to the diagnosis or index date based on an electronic search of the Kaiser Permanente Hawaii pharmacy database for Generic Product Identification codes. A conditional logistic regression model with clinical diagnosis of uveitis as the outcome was used to assess the relationship between statin use and uveitis. RESULTS: One hundred eight incident cases of uveitis were identified. Nineteen percent of uveitispatients had used statin medication in the year prior to diagnosis compared to 30% of patients in the general Kaiser population control (P = .03) and 38% of patients in the ophthalmology clinic control (P < .001). Using the general Kaiser population control and adjusting for age, sex, race, and autoimmune diseases, the odds of a statin user developing uveitis were 48% less than the odds of a non-statin user developing uveitis (OR: 0.52, 95% CI: 0.29-0.94, P = .03). Similarly, the odds of developing uveitis were 33% less for statin users compared to non-statin users (OR: 0.67, 95% CI: 0.38-1.19, P = .17) when adjusting for these factors and using the ophthalmology clinic control group. CONCLUSIONS: Statin use may be protective against the development of uveitis. Several anti-inflammatory and immunomodulatory mechanisms may explain this association.
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