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Table 4 Final model of correlates of the BASFI

From: Psychological correlates of self-reported functional limitation in patients with ankylosing spondylitis

Independent variable Mean difference 95% confidence interval R2 (%) Pvalue
Overall model    48.8 < 0.001
Age (at baseline visit, V0) 0.31 0.11-0.51   0.002
Depression (PHQ) (higher score = more depression, range 0-27) 1.20 0.58-1.82   < 0.001
Arthritis helplessness (higher score = more helpless behavior, range 5-25) 1.31 0.62-2.01   < 0.001
Passive coping (higher score = more passive coping, range 11-55) 0.69 0.24-1.13   0.003
BASRI (range 1.5-16) 1.28 0.61-1.95   < 0.001
Erythrocyte sedimentation rate 0.33 0.17-0.48   < 0.001
  1. BASFI = Bath Ankylosing Spondylitis Functional Index; BASRI = Bath Ankylosing Spondylitis Radiographic Index; PHQ = Patient Health Questionnaire.