Table 4:

Univariate analysis for FEV1 parameter (n = 228 patients)

	FEV1
	≤60%		60% < FEV1 < 80%		≥80%		P-value
	n	%	n	%	n	%
Global complications
No	9	30	29	63	113	74	<0.001
Yes	21	70	17	37	39	26
Mean hospital stay (SD)	16.13 (23.34)		9.45 (8.1)		7.6 (6.27)		<0.001
Mean drainage duration (SD)	5.7 (3.2)		5.04 (5.2)		4.67 (4.74)		0.53

SD: standard deviation; FEV1: forced expiratory volume in 1 s.