Lung Function before and Two Days after Open-Heart Surgery

Table 4

The variables associated with decrease in postoperative lung volumes (in % of the preoperative value), (𝑛=107). Univariate analyses.

Independent variables	Dependent variables
	VC	FEV1	IC
	𝐵 (95% CI)	𝐵 (95% CI)	𝐵 (95% CI)
Male versus female	—	—	7.24 (−0.25, 14.7)^†
Diabetes	—	−9.22 (−18.2, −0.21)^*	—
Airflow obstruction		−9.72 (−19.9, 0.51)^†
Smoker versus no smoker	—	—	−15.5 (−26.8, −4.20)^*
Postoperative weight gain (hyperhydration), kg	—	−1.16 (−2.41, 0.09)^†	—
ICU time/4 h	—	0.73 (0.54, 1.00)^*	—

VC: vital capacity, FEV₁: forced expiratory volume in 1 second, IC: inspiratory capacity, airflow obstruction: defined as FEV₁/VC or FVC < 70% or asthma, smoking (current smoker, smoker versus no smoker or nerver smoked), postoperative weight gain: relation between pre- and second postoperative day, ICU: intensive care unit. ^*𝑃<0.05, ^†𝑃= 0.05–0.10, 𝐵: regression coefficient, CI: confidence interval.