Table 2.

Asymptomatic patients’, congenital lung malformation, operative and postoperative characteristics, stratified into two groups based on the age at surgery; before and after 6 months of age P<0.05 was considered as statistically significant

	<6 months n=81 (%)	>6 months n=56 (%)	P
Patients’ characteristics
Prenatal diagnosis	81 (100)	51 (91)	0.01
Sex (male/fenale)	38/43	30/26	-
Age at surgery (mean±SD)	4.14±2.08 months	7.66±9.35 months	0.009
Weight at surgery (mean±SD)	6.21±1.48 kg	7.51±2.39 kg	0.001
Associated malformations	4 (5)	5 (9)	0.48
CLM characteristics
Diameter (mean±SD)	4.07±1.51 cm	4.23±1.66 cm	0.55
Histology
CCAM	42 (52)	21 (37.5)	0.11
Hybrid lesions	2 (2)	3 (5)	0.39
Intralobar Sequestration	20 (25)	17 (31)	0.55
Extralobar Sequestration	13 (16)	5 (9)	0.30
Bronchogenic cyst	0	3 (5)	0.06
Lobar emphysema	4 (5)	7 (12.5)	0.10
Operative data
Surgical technique
Thoracotomy	44 (54)	28 (50)	0.72
Thoracoscopy	37 (46)	28 (50)	0.72
Duration of procedure (mean±SD)	106.33±36.1 min	106.0±36.5 min	0.95
Type of procedure
Lobectomy	3 (4)	0	0.06
Segmentectomy	4 (5)	2 (3.5)	1.00
Wedge resection	61 (75)	48 (86)	0.19
Others	13 (16)	6 (10.5)	0.45
Postoperative data
Duration of postoperative drainage	6.0±5 days	5.9±4.8 days	0.90
Days in intensive care	3.4±2.9 days	3.1±2.4 days	0.52
Length of hospital stay	14.1±11.6 days	12.0±9.7 days	0.26
Postoperative complications	6 (7)	1 (2)	0.24
Pneumonia	0	0	-
Persistent pneumothorax	4 (5)	1 (2)	0.64
Respiratory distress	0	0	-
Others	2 (3)	0	0.51
Reintervention	1 (1)	0	1.00

CLM: Congenital lung malformation, CPAM: Congenital pulmonary airway malformation, SD: Standard deviation