Table 2.

Potential predictors of RA - multivariable analysis.

	HR (95% CI)	P Value
Adiponectin, per 10 mg/L	1.70 (1.12–2.60)	0.01
Surgery vs control group	0.95 (0.60–1.50)	0.82
Men vs women	0.75 (0.42–1.34)	0.33
Age, per 10 years	0.97 (0.67–1.41)	0.87
BMI, per 10 kg/m2	1.09 (0.68–1.77)	0.72
ESR, per 10 mm/h	1.04 (0.85–1.27)	0.71
CRP, per 10 mg/L	1.30 (1.09–1.56)	0.005
Current or former smoking, yes vs no	1.71 (1.04–2.82)	0.04

The adjusted hazard ratios (HR) were calculated using a Cox proportional hazards models based on baseline data.

BMI, body-mass index; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; CI, confidence interval.