Skip to main content

Table 2 Univariate analyses of demographic, medical and psychological variables in relationship to BASFI

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

Independent variable Mean difference in BASFI 95% confidence interval Pvalue
Age (at baseline visit) 0.48 0.28-0.68 < 0.001
Education -3.07 -5.36--0.78 0.009
Gender (male) -3.18 -9.48-3.12 0.322
Ethnicity (white) -1.17 -8.73-6.39 0.761
Employment (yes) -16.41 -22.27--10.54 < 0.001
Student (yes) 0.75 -9.49-10.99 0.885
Married (yes) 3.31 -2.76-9.38 0.284
Current tobacco use (yes) 9.64 0.48-18.81 0.039
Number of medical co-morbidities 3.48 1.32-5.64 0.002
NSAIDs (yes) 2.37 -3.49-8.23 0.427
Biologics (yes) -2.46 -8.33-3.40 0.409
Erythrocyte sedimentation rate 0.41 0.23-0.59 < 0.001
Disease duration 0.37 0.15-0.58 < 0.001
BASRI 1.74 0.97-2.50 < 0.001
Frequency of exercise/week -0.19 -1.44-1.06 0.766
Back exercise (yes) -7 -13.11--0.893 0.025
Physical therapy (yes) 8.75 -1.63-19.13 0.098
Resilience coping (BRCS) -1.42 -2.30--0.55 0.002
Arthritis internality -1.34 -1.81--0.87 < 0.001
Arthritis helplessness 2.76 2.18-3.34 < 0.001
Depression (PHQ-9) 2.40 1.90-2.91 < 0.001
Active coping -0.49 -1.04-0.07 0.086
Passive coping 1.39 1.04-1.75 < 0.001
  1. BASFI = Bath Ankylosing Spondylitis Functional Index; BASRI = Bath Ankylosing Spondylitis Radiographic Index; BRCS = Brief Resilient Coping Scale; PHQ = Patient Health Questionnaire.