Table 2: The variables associated with postoperative lung volumes (expressed as percent of predicted values), ( ). Univariate analyses.

Independent variablesDependent variables
VC FEV1IC
(95% CI) (95% CI) (95% CI)

Males versus female−4.90 (−10.4, 0.59)−19.4 (−25.4, −13.5)*
Age/10 years3.00 (0.53, 5.50)*3.03 (0.40, 5.70)*
BMI weight (kg)/length m2−0.78 (−1.42, −0.13)*−0.70 (−1.49, 0.08)
CABG versus valve surgery5.29 (0.58, 9.99)*
ICU time/4 h−0.34 (−0.66, −0.24)*

VC: vital capacity, FEV1: forced expiratory volume in 1 second, IC: inspiratory capacity, BMI: body mass index, type of surgery (CABG: coronary artery bypass grafting, valve: aorta, mitralis, or tricuspidalis valve surgery), ICU: intensive care unit. * , 0.05–0.10, : regression coefficient, CI: confidence interval.