The added burden of depression in patients with osteoarthritis in Japan

Toshinaga Tsuji,1 Ken Nakata,2 Jeffrey Vietri,3 Dena H Jaffe41Medical Affairs Department, Shionogi & Co., Ltd, Osaka, Japan; 2Medicine for Sports and Performing Arts, Osaka University, Suita, Japan; 3Health Outcomes Practice, Health Division, Kantar, 4 Ariel Sharon Street, Horsham, PA, USA; 4Health Outcomes Practice, Health Division, Kantar, Tel Aviv, IsraelObjectives: In Japan, osteoarthritis (OA) is a leading source of pain and disability; depressive disorders may limit patients’ ability to cope with OA. This study examined the incremental effect of depression on the relationship between OA and health-related outcomes.Methods: Data from the 2014 Japan National Health and Wellness Survey (N=30,000) were collected on demographics, OA characteristics, and health characteristics of patients with OA. Depression symptoms were measured, and outcomes included health-related quality of life (HRQoL), work productivity and activity impairment, and health care resource utilization. Generalized linear regression models controlling for confounders were used to predict health-related outcomes.Results: Of 565 respondents with OA, 63 (11%) had symptoms of moderate or severe depression. In adjusted models, HRQoL remained lower among respondents with than without depression (p