Table 4.

Multivariate linear regression for predictors of longer patient-reported symptom duration (days; negative towards longer patient-reported duration)

Variable	Coefficient	95% CI
Female	29.331	−46.525 to 105.189
Age	1.426	−0.986 to 3.838
Fibromyalgia	−413.551	−627.546 to 199.555
OA	−149.903	−255.278 to 44.529
Current smoker	−99.284	−186.105 to 12.462
Income >US$50 000	73.999	6.800 t 141.198
Baseline non-MTX, non-biologic DMARD use	−90.145	−173.756 to 6.534

Ethnicity, baseline MTX combination therapy, oral corticosteroid use were not significant in final MV model.

DMARD, disease-modifying antirheumatic drug; MTX, methotrexate; OA, osteoarthritis.