Table 1

 Clinical and radiological data on all patients in relation to normal and increased occiput to wall distance

VariableOWD = 0 (n = 74)OWD >0 (n = 61)p Value*
Values are mean (SD) unless stated otherwise.
*For the difference between patients with OWD = 0 v >0.
BASDAI, Bath ankylosing spondylitis disease activity index; BASFI, Bath ankylosing spondylitis functional index; mSASSS, modified Stoke ankylosing spondylitis spine score; OWD, occiput to wall distance; y, years.
Age (y)45.7 (10.5)53.5 (11.9)<0.001
Mean disease duration13.3 (9.7)16.5 (9.6)0.06
after diagnosis (y)
Sex (% male)57%81%<0.001
BASDAI3.3 (2.3)3.6 (2.4)0.28
BASFI2.8 (2.3)4.8 (2.5)<0.001
MSASSS8.0 (10.9)28.5 (22.0)<0.001
Wedge thoracic spine0.94 (0.04)0.90 (0.06)<0.001
Wedge lumbar spine1.03 (0.05)1.05 (0.06)0.013
At least one wedged vertebra (n)15/7427/610.005
Severe hip involvement (n)4/708/530.12