Table 3 Associations of male gender with Bath Ankylosing Spondylitis Radiographic Index Spine score category from the Prospective Study of Outcomes in Ankylosing Spondylitis cohort, with adjustments for age or duration of ankylosing spondylitis and multivariate modelling*.

Independent variable	Age‐adjusted OR (95% CI)	p Value	Duration adjusted OR (95% CI)	p Value
Male	3.86 (2.53 to 5.90)	<0.001	4.10 (2.69 to 6.26)	<0.001
Multivariate analysis
Male	3.81 (2.45 to 5.93)	<0.001	3.83 (2.46 to 5.96)	<0.001

*These ORs represent the likelihood that men were more likely than women to be in a higher BASRI‐spine category than in the same or in a lower category.