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Table 9 Multivariate Cox regression analysis of predictors of incident cardiovascular events during follow-up 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 Adjusted hazard ratio (95% CI) P value
Cox model 1 – SSc and SLE ( n= 129)a    
Coronary heart disease 2.326 10.24 (3.04 to 34.55) <0.001
Male sex 2.172 8.78 (2.73 to 28.19) <0.001
Carotid and femoral artery plaque    
 Group 3 (CP and FP) versus group 1 (no plaque) 1.812 6.13 (1.27 to 29.53) 0.024
 Group 2 (CP or FP) versus group 1 (no plaque) 0.092 1.10 (0.13 to 9.08) 0.932
Cox model 2 – SSc and SLE ( n= 129)b    
Coronary heart disease 2.322 10.19 (3.04 to 34.17) <0.001
Male sex 2.172 8.78 (2.73 to 28.19) <0.001
Carotid and femoral artery plaque    
 Group 3 (CP and FP) versus all other (CP or FP or no plaque) 1.778 5.92 (1.55 to 22.67) 0.009
  1. Group 1, patients without carotid or femoral artery plaque; group 2, patients with only carotid or only femoral artery plaque; group 3, patients with coexistent carotid and femoral artery plaque. CI, confidence interval; CP, carotid artery plaque; FP, femoral artery plaque; SLE, systemic lupus erythematosus; SSC, systemic sclerosis. aZero observations excluded from model because of missing values. Events per variable: 19/4 = 4.75. bZero observations excluded from model because of missing values. Events per variable: 19/3 = 6.33.