Table 4 Multivariate analysis of variables determining occiput to wall distance in patients with ankylosing spondylitis.

Variable	Standardised β	p Value
MSASSS	0.47	0.01
Mean wedging	0.28	0.01
of thoracic spine
BASDAI	0.15	0.05
Hip involvement	0.12	0.08

Adjusted for age, sex, and disease duration after diagnosis.

Model R² = 0.42.

BASDAI, Bath ankylosing spondylitis disease activity index; mSASSS, modified Stoke ankylosing spondylitis spine score.