Table 6.

Multiple linear regression analysis of airway pressure and PEEP

All subjects	Model1	Model2	Model3
Ppeak
Beta	0.489	0.514	0.515
P	< 0.001	< 0.001	< 0.001
Pmean
Beta	0.713	0.740	0.744
P	< 0.001	< 0.001	< 0.001

Model 1: Adjustment for age and gender; Model 2: Adjustment for age, gender, triglyceride, total cholesterol, low density lipoprotein cholesterin, fasting plasma glucose, serum creatinine and uric acid; Model 3: Adjustment for hemoglobin, body temperature, minute ventilation volume and peripheral oxygen saturation on the basis of Model 2

Ppeak Peak airway pressure, Pmean Mean airway pressure