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Table 1 Demographic and disease-related characteristics of patients with ankylosing spondylitis

From: Sleep disturbances are associated with increased pain, disease activity, depression, and anxiety in ankylosing spondylitis: a case-control study

Variables Values
Age (years)a 27.65 ± 8.34
Gender: female, n (%)b 80 (25.5)
Years of education, n (%)b  
   ≤6 years 8 (2.5)
   7-9 years 54 (17.2)
   10-12 years 78 (24.8)
   13-17 years 156 (49.7)
   ≥18 years 8 (5.7)
Number employed, n (%)b 191 (60.8)
Number of students, n (%)b 89 (28.3)
Married, n (%)b 177 (56.4)
ESR (mm/h)a 16.80 ± 18.78
CRP (mg/dl)a 1.62 ± 3.45
Disease duration (years)a 6.07 ± 4.90
Morning stiffness (minutes)a 11.90 ± 27.80
Fingertip-to-floor distance (cm)a 9.77 ± 13.70
Overall assessment of health (VAS)a 5.34 ± 2.87
Nocturnal pain (VAS)a 3.69 ± 2.95
Total back pain (VAS)a 3.85 ± 2.70
BASMIa 1.39 ± 1.89
BASDAI (VAS)a 3.58 ± 2.09
BASFI (VAS)a 1.64 ± 2.17
PSQIa 6.62 ± 3.62
SDSa 47.26 ± 10.45
SASa 48.36 ± 8.10
  1. aMean ± SD. bPercentage. N = 314. BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; BASFI, Bath Ankylosing Spondylitis Functional Index; BASMI, Bath Ankylosing Spondylitis Metrology Index; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; PSQI, Pittsburgh Sleep Quality Index; SAS, Self-rating Anxiety Scale; SDS, Self-rating Depression Scale; VAS, visual analogue scale.