Table 1. Comparison of baseline characteristics of patients with or without uveitis.

		Uveitis present (n=193)			Uveitis absent (n=405)
	n	%	Mean±SD	n	%	Mean±SD	p
Age (year)			39.7±9.2			37.4±9.2	0.01
Sex	30	15.54		39	9.63		0.04
Female
Duration (year)			20.8±5.7			20.8±5.7	0.91
Family history of AS	40	20.73		59	14.57		0.39
JoAS	41	21.24		73	18.02		0.57
Peripheral arthritis	85	44.04		153	37.8		0.15
Hip joint involvement	113	58.5		172	42.5		< 0.01
HLA-B27 positivity	184	95.33		375	92.59		0.02
Use of biologics	106	54.92		165	40.74		0.09
mSASSS			18.8±16.9			17.1±17.1	0.26
ESR (mm/h)			58.7±37.1			50.3±37.5	0.07
CRP (mg/dL)			4.0±3.7			3.5±3.3	0.23
SD: Standard deviation; AS: Ankylosing spondylitis; JoAS: Juvenile-onset ankylosing spondylitis; HLA: Human leukocyte antigen; mSASSS: Modified Stoke
Ankylosing Spondylitis Spinal Score; ESR: Erythrocyte sedimentation rate; CRP: C-reactive protein.