Table 3 Correlations between daily physical activity and clinical assessments in patients with ankylosing spondylitis

Number of patients

86^a

94^a

55^b

Disease activity

   BASDAI (range 0 to 10)^c

-0.220*^d

-0.326**^d

NS

   ESR (mm/hour)^c

NS

NS

-0.460***^d

   CRP (mg/l)^c

NS

NS

-0.289*^d

   ASDAS_CRP^c

-0.243*^d

-0.311**^d

-0.283*^d

Physical function

   BASFI (range 0 to 10)^c

-0.387***^d

-0.476***^e

-0.274*^e

Spinal mobility

   Occiput-to-wall distance (cm)^c

NS

-0.297**^d

NS

   Chest expansion (cm)^f

NS

NS

NS

   Modified Schober test (cm)^f

NS

0.260*^d

0.338*^d

   Lateral spinal flexion (cm)^f

NS

NS

0.369*^e

   Cervical rotation (degrees)^f

NS

0.306**^d

0.320**^d

Quality of life

   ASQoL^c

-0.282**^d

-0.500***^d

-0.356**^d