Table 2.

Correlations of HDL-cholesterol or oxidized HDL (outcome variables) with other variables (predictive variables)

Outcome variable	For HDL-cholesterol		For oxidized HDL
Predictive variable	r (P-value)	β (P-value)	r (P-value)	β (P-value)
Age, years	0.12 (0.15)	0.06 (0.37)	0.23 (< 0.01)**	0.09 (0.26)
Gender, male	−0.25 (< 0.01)**	−0.21 (< 0.01)**	−0.28 (< 0.01)**	−0.15 (0.05)
Body mass index, kg/m2	−0.43 (< 0.01)**	−0.31 (< 0.01)**	−0.16 (0.04)*	−0.05 (0.61)
Mean blood pressure, mmHg	−0.19 (0.02)*	0.11 (0.14)	0.06 (0.47)	0.11 (0.284)
Plasma glucose, mmol/l	0.07 (0.41)	−0.01 (0.93)	0.26 (< 0.01)**	0.19 (0.01)*
LDL-cholesterol, mmol/l	0.04 (0.64)	0.16 (< 0.01)**	−0.02 (0.86)	0.02 (0.75)
Triglyceride, mmol/l	−0.50 (< 0.01)**	−0.25 (< 0.01)**	−0.20 (0.02)*	−0.02 (0.85)
LDL particle size, nm	0.49 (< 0.01)**	0.32 (< 0.01)**	−0.17 (0.04)*	0.03 (0.75)
HDL-cholesterol, mmol/l	−	−	0.46 (< 0.01)**	0.38 (< 0.01)**
Oxidized HDL, U/ml	0.46 (< 0.01)**	0.24 (< 0.01)**	−	−

HDL: high-density lipoprotein, LDL: low-density lipoprotein.

r: simple correlation test (Pearson’s test); β: multiple linear regression analysis for HDL-cholesterol or oxidized HDL.

The values of triglyceride and oxidized HDL were log-transformed because of their skewed distributions.

Significance level: * P < 0.05, ** P < 0.01.