Table 1. Baseline clinical variables associated with functional severity in AS patients.

	p value
Clinical Variable	BASFI/t p75	BASFI/t p70	BASFI/t p65	BASFI/t p60
Age at disease onset	<.001	<.001	<.001	<.001
Neck pain	.040	.002	.004	.011
Low back pain	NS	NS	NS	.030
HLA-B27	NS	.050	.049	NS

NS- no statistically significant.