Abstract
OBJECTIVE: Osteoarthritis (OA) and rheumatoid arthritis (RA) are associated with similar patient disease burdens and a high prevalence of comorbid anxiety (ANX), depression (DEP), and fibromyalgia (FM). Nonetheless, these comorbidities are infrequently assessed in routine care, in part because multiple questionnaires are not feasibly completed by patients. We analyzed the prevalence of ANX, DEP, and FM in patients with OA versus patients with RA seen in routine care using indices within a single Multidimensional Health Assessment Questionnaire (MDHAQ) and associations with \ Routine Assessment of Patient Index Data 3 (RAPID3) and its component function, pain, and patient global scores. METHODS: A retrospective analysis of MDHAQ data in unselected patients with OA or RA receiving routine care at one setting included four indices within an MDHAQ: MDHAQ ANX screen, MDHAQ DEP screen, Fibromyalgia Assessment Screening Tool, and RAPID3. The prevalence of each comorbidity and associations with RAPID3 and components were analyzed in unadjusted and age-adjusted (Mantel-Haenszel) odds ratios (ORs) and 95% confidence intervals. RESULTS: Overall, 40.4% of 361 patients with OA and 36.3% of 488 patients with RA screened positive for ANX, DEP, and/or FM (8.1% and 7% for all three, respectively). RAPID3 and each component were elevated significantly in patients with any positive screen result for ANX, DEP, and/or FM in both diagnoses (ORs of 2.6-35.8). CONCLUSION: FM, DEP, and/or ANX rates were 40.4% in patients with OA and 36.3% in patients with RA, associated with significantly poorer patient status measures. Each of these three common comorbidities of patient distress may be feasibly screened for on a single MDHAQ in routine care.