Table 2

The association between TPA and PsA versus PsC by linear regression analysis

CovariateUnivariate modelMultivariate model
β* (95% CI)p Valueβ* (95% CI)p Value
Disease status: PsA0.9 (0.1 to 1.7)0.030.8 (0.1 to 1.4)0.02
Age (10 years increase)1.4 (1.1 to 1.7)<0.0011.3 (1 to 1.6)<0.001
Sex: male0.5 (0.1 to 0.9)0.020.5 (0.2 to 0.9)<0.001
Smoker: ever1.1 (0.3 to 1.9)0.0070.7 (0.1 to 1.3)0.02
Hypertension2.3 (1.5 to 3.1)<0.0010.5 (−0.3 to 1.2)0.21
Diabetes3.0 (1.7 to 4.3)<0.0011.2 (0.07 to 2.4)0.04
Total cholesterol level−0.4 (−0.7 to −0.04)0.03−0.1 (−0.5 to 0.1)0.39
Lipid lowering agents2.0 (1 to 2.9)<0.0010.1 (−0.7 to 1)0.75
Triglyceride level−0.004 (−0.4 to 0.3)0.83−0.003 (−0.3 to 0.3)0.98
BMI0.05 (−0.02 to 0.1)0.17−0.02 (−0.08 to 0.05)0.62
Alcohol consumption
 Daily versus none0.9 (−0.5, 2.3)0.210.5 (−0.6 to 1.2)0.37
 Social versus none0.09 (−0.8, 0.9)0.830.6 (0.01 to 1.3)0.08
  • *Linear (β) regression coefficients.

  • BMI, body mass index; PsA, psoriatic arthritis; PsC,cutaneous psoriasis without arthritis; TPA, total plaque area.