Table 3 Associations between physical activity and disease severity measures
Association between BASDAI (outcome) and IPAQ (predictor)
FE model; crudePAdjusted*P
Log IPAQ-0.18 (-0.27, -0.09)<0.001-0.10 (-0.18, -0.02)0.013
IPAQ category-0.12 (-0.23, -0.00)0.046-0.04 (-0.14, 0.07)0.49
Vigorous activity-0.21 (-0.38, -0.04)0.029-0.16 (-0.31, -0.01)0.037
Association between BASDAI Fatigue (outcome) and IPAQ (predictor)
Log IPAQ-0.11 (-0.23, 0.01)0.07-0.03 (-0.14, 0.08)0.63
IPAQ category-0.08 (-0.23, 0.07)0.290.00 (-0.14, 0.14)0.99
Vigorous activity-0.13 (-0.35, 0.10)0.26-0.08 (-0.29, 0.14)0.49
Association between BASDAI stiffness (outcome) and IPAQ (predictor)
Log IPAQ-0.19 (-0.28, -0.09)<0.001-0.11 (-0.20, -0.03)0.01
IPAQ category-0.19 (-0.32, -0.07)0.002-0.12 (-0.23, -0.01)0.041
Vigorous activity-0.16 (-0.34, 0.03)0.091-0.11 (-0.28, 0.06)0.20
Association between BASDAI axial pain (outcome) and IPAQ (predictor)
Log IPAQ-0.17 (-0.29, -0.05)0.005-0.08 (-0.18, 0.03)0.17
IPAQ category-0.15 (-0.30, 0.01)0.06-0.05 (-0.19, 0.09)0.46
Vigorous activity-0.15 (-0.38, 0.07)0.19-0.09 (-0.30, 0.12)0.38
Association between BASDAI other pain (outcome) and IPAQ (predictor)
Log IPAQ-0.12 (-0.24, -0.01)0.032-0.06 (-0.17, 0.05)0.31
IPAQ category-0.05 (-0.20, 0.10)0.520.02 (-0.13, 0.16)0.82
Vigorous activity-0.17 (-0.39, 0.05)0.12-0.13 (-0.34, 0.08)0.23
Association between BASDAI tenderness (outcome) and IPAQ (predictor)
Log IPAQ-0.23 (-0.34, -0.12)<0.001-0.15 (-0.26, -0.05)0.004
IPAQ category-0.15 (-0.30, -0.01)0.034-0.08 (-0.22, 0.05)0.24
Vigorous activity-0.17 (-0.38, 0.04)0.12-0.12 (-0.32, 0.08)0.23

The log IPAQ scores given represent METs minutes per week; IPAQ categories consisted of low, medium and high as described in methods. Regression coefficients and the associated 95% confidence intervals are represented along with P values.

  • * Adjusted for howRU