Table 3.

Multivariate analysis of factors related to the risk of depression in ankylosing spondylitis patients

Variables		Crude HR (95% CI)	Adjusted HRa
Sex	Male	1 (ref.)	1 (ref.)
	Female	1.744 (1.637,1.859)	1.602 (1.502,1.708)
Age group	<40 years	1 (ref.)	1 (ref.)
	≥40 years	2.273 (2.133,2.422)	1.771 (1.652,1.898)
Income	Other	1 (ref.)	1 (ref.)
	Low 20%	1.373 (1.283,1.47)	1.281 (1.197,1.372)
Residence	Urban	1 (ref.)	1 (ref.)
	Rural	1.075 (1.011,1.144)	1.075 (1.01,1.143)
Diabetes	No	1 (ref.)	1 (ref.)
	Yes	2.418 (2.175,2.688)	1.258 (1.118,1.415)
Hypertension	No	1 (ref.)	1 (ref.)
	Yes	2.523 (2.346,2.714)	1.489 (1.363,1.627)
Hyperlipidemia	No	1 (ref.)	1 (ref.)
	Yes	2.475 (2.268,2.702)	1.323 (1.194,1.467)
Cancer	No	1 (ref.)	1 (ref.)
	Yes	2.478 (2.059,2.983)	1.648 (1.367,1.987)
Stroke	No	1 (ref.)	1 (ref.)
	Yes	4.159 (3.53,4.9)	2.057 (1.734,2.439)
End-stage renal disease	No	1 (ref.)	1 (ref.)
	Yes	3.978 (2.641,5.993)	2.045 (1.354,3.089)

Adjusted HR^a; adjusted for all variables in the mode.