Health-Related Quality of Life in Korean Patients with Ankylosing Spondylitis

Kim, Tae Jong; Oh, Kwang Taek; Ju, Eun Kyung; Lee, Hye Soon; Kim, Tae Hwan; Jun, Jae Bum; Jung, Sungsoo; Yoo, Dae Hyun; Bae, Sang Cheol

Abstract

OBJECTIVE
To assess the health-related quality of life (HRQOL), the correlation among each measurement, and to identify the predictors for HRQOL in Korean patients with ankylosing spondylitis (AS).
METHODS
The HRQOL and clinical and laboratory parameters were assessed by Short Form Health Survey-36 (SF-36), EuroQol5 Dimensions (EQ-5D), time trade off (TTO), standard gamble (SG), Centers for Epidemiologic StudiesDepression (CES-D), social support, self-efficacy scale, Bath Ankylosing Spondylitis Functional Index (BASFI), Schober test, occiput to wall test, ESR, and CRP from 90 patients with AS.
RESULTS
78 patients (86.7%) were men with a mean (+/-SD) age of 28.4 (+/-7.9) years. The mean years of disease onset was 10.44 (+/-6.95). The mean scores of SF-36 global, mental component summary (MCS) and physical component summary (PCS) were 53.4 (+/-21.2), 61.8 (+/-26.3), and 51.7 (+/-24.4), respectively. The mean EQ-5D utility and visual analog scale (VAS) score were 0.63 (+/-0.2) and 57.1 (+/-18.6). The mean scores of the TTO and SG were 0.46 (+/-0.6) and 0.46 (+/-0.6). The scores of the SF-36 and EQ-5D in AS patients were lower than those in healthy control. The mean scores of CES-D, self-efficacy scale, social support and social network were 10.5 (+/-6.8), 65.3 (+/-14.6), 2.46 (+/-0.22), and 2.33 (+/-0.47), respectively. The mean score of BASFI was 2.48 (+/-2.13). The BASFI total score was negatively correlated with the scores of SF-36, MCS, PCS, EQ-5D utility and VAS score, social network, and self-efficacy scale, and positively correlated with CES-D. In multivariate models, the predicting variables of SF-36 global and PCS were BASFI and self-efficacy scale and the predicting variables of SF-36 MCS were BASFI, social support, and self-efficacy scale.
CONCLUSION
In this study, we observed that HRQOL in Korean patients with ankylosing spondylitis is decreased compare to healthy control. And the efforts to improve HRQOL should be designed to improve the self-efficacy and social support in addition to active treatment to prevent functional disability.