Table 2. Comparison of prevalence of risk factors between spine OA and control group.

Spine OA	without	with
n	7834	1129	p
Age>65	61.3%(0.2)	69.9%(0.4)	<0.0001
Sex (female)	51.1%(0.5)	77.0%(1.5)	<0.0001
Smoke	18.6%(0.6)	12.4%(1.3)	0.0002
Heavy drink	49.1%(0.7)	28.3%(1.7)	<0.0001
Heavy exercise	17.9%(0.6)	18.2%(1.8)	0.8224
With spouse	81.7%(0.6)	57.8%(1.9)	<0.0001
High education	37.8%(0.9)	12.3%(1.4)	<0.0001
Low Income	25.8%(0.9)	52.6%(2.0)	<0.0001
Mental stress	21.2%(0.5)	32.4%(1.6)	<0.0001
DM	16.6%(0.5)	19.9%(1.8)	0.0532
HTN	48.0%(0.8)	61.0%(1.9)	<0.0001
MS	43.5%(0.7)	51.9%(2.1)	<0.0001

All the values are adjusted for statistical comparisons.

(P<0.05- statistical significance; (): standard error)

DM: diabetes mellitus; HTN: hypertension; MS: metabolic syndrome