Table 5

Logistic regression models for predicting high and low disease activity states and need for increase in treatment intensity using BASDAI or ASDAS

Response	Predictor	OR	p Value	AUC	N	95% CI of AUC
High disease activity based on patient report	BASDAI	2.54	<0.001	0.92	194	0.88 to 0.95
High disease activity based on patient report	ASDAS-B	6.69	<0.001	0.90	194	0.85 to 0.94
High disease activity based on patient report	ASDAS-C	8.39	<0.001	0.91	156	0.86 to 0.96
High disease activity based on physician report	BASDAI	1.53	<0.001	0.78	191	0.67 to 0.88
High disease activity based on physician report	ASDAS-B	3.08	<0.001	0.81	191	0.71 to 0.91
High disease activity based on physician report	ASDAS-C	2.42	<0.001	0.77	154	0.64 to 0.91
Change in treatment	BASDAI	1.31	<0.001	0.69	193	0.63 to 0.76
Change in treatment	ASDAS-B	1.80	<0.001	0.68	193	0.61 to 0.76
Change in treatment	ASDAS-C	1.91	<0.001	0.69	155	0.61 to 0.77

For definitions of disease activity states see text.
ASDAS, Ankylosing Spondylitis Disease Activity Score; AUC, area under the curve; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index.