Table 1 Characteristics of AS patients and population controls
Characteristics | AS Patients (n= 147) | Controls (n= 121) | P-value |
|---|---|---|---|
Age (yr) median (range) | 48.5 (30 to 70) | 56.0 (30 to 70) | 0.01a |
Male n (%) | 93 (63.3) | 68 (56.2) | 0.24d |
Height (cm), mean (SD) | 174.1 (9.7) | 173.4 (8.9) | 0.54b |
Weight (kg) mean (SD) | 77.4 (13.7) | 77.5 (13.7) | 0.98b |
BMI (kg/cm2) mean (SD) | 25.5 (3.5) | 25.7 (3.7) | 0.59b |
ASDAS n (%) | - | ||
< 1.3 (low) | 23 (15.6) | ||
1.3 to 2.1 (moderate) | 45 (30.6) | ||
2.1 to 3.5 (high) | 58 (39.5) | ||
> 3.5 (very high) | 10 (10.9) | ||
BASFI | 2.1 (0 to 10) | 0.3 (0 to 6.3) | < 0.001a |
BASMI | 3.3 (1.8) | 1.7 (0.9) | < 0.001b |
CRP | 3.0 (1.57) | 1.0 (1.103) | < 0.001a |
ESR | 16.5 (1.90) | 8.0 (1.70) | < 0.001a |
VO2peak (ml/kg/min) | 39.4 (8.0) | 40.4 (7.5) | 0.002e |
Smoking | |||
Lifelong non-smoker, n (%) | 74 (50.0) | 59 (48.8) | 0.81c |
Ex-smoker, n (%) | 48 (32.4) | 38.2 (30.6) | |
Current smoker, n (%) | 26 (17.6) | 22.9 (20.7) | |
> 12 yr education, n (%) | 103 (71) | 68 (57) | 0.03d |
Currently employed, n (%) | 111 (76.6) | 99 (83.2) | 0.18d |
Social security benefit, n (%) | 57 (39.4) | 15 (12.6) | < 0.001d |
Married/living with partner, n (%) | 99 (67) | 71 (60) | 0.20d |
Anti-TNF-alpha medication | 32 (22) | - |