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Table 7 Multivariate logistic regression analysis of predictors of atherosclerotic plaque in systemic sclerosis and systemic lupus erythematosus patients

From: Atherosclerotic plaques occur in absence of intima-media thickening in both systemic sclerosis and systemic lupus erythematosus: a duplexsonography study of carotid and femoral arteries and follow-up for cardiovascular events

Variable Beta coefficient Odds ratio (95% CI) P value
Systemic sclerosis ( n= 85)a    
Age (per 5 years) 0.904 2.47 (1.61 to 3.78) <0.001
Nicotine use (per 5 pack-years) 0.554 1.74 (1.13 to 2.68) 0.012
Prednisolone intake (per 5 mg/day over 5 years) 0.940 2.56 (1.09 to 6.04) 0.032
Systemic lupus erythematosus ( n= 98)b    
Age (per 5 years) 0.824 2.28 (1.61 to 3.22) <0.001
Nicotine use (per 5 pack-years) 0.313 1.37 (1.05 to 1.78) 0.021
ssDNA antibody positive -1.613 0.20 (0.05 to 0.83) 0.026
Duration of azathioprine use (per 5 years) 0.947 2.58 (0.93 to 7.13) 0.068
  1. CI, confidence interval; ssDNA, single-stranded DNA.
  2. aFive observations excluded from model because of missing values. Events per variable: 27/3 = 9. Constant = -10.435. Nagelkerke R2 = 65.6%. Hosmer–Lemeshow test P = 0.147. bTwo observations excluded from model because of missing values. Events per variable: 49/4 = 12.25. Constant = -8.507. Nagelkerke R2 = 65.2%. Hosmer–Lemeshow test P = 0.914.