Risk factors for pulmonary infection after thoracoscopic radical resection of lung cancer in elderly patients with diabetes mellitus

Table 3 Comparison of surgical treatment and laboratory indicators, mean ± SD/n (%)

Items		Infected group (n = 41)	Non-infected group (n = 171)	t/χ2 value	P value
Operation time (hour)	≥ 3	25 (60.98)	72 (42.11)	4.745	0.029
	< 3	16 (39.02)	99 (57.89)
Intraoperative bleeding (mL)	≥ 800	11 (26.83)	38 (22.22)	0.395	0.530
	< 800	30 (73.17)	133 (77.77)
Extent of excision	Multi leaf	28 (68.29)	75 (43.86)	7.903	0.005
	Single leaf	13 (31.71)	96 (56.14)
Thoracic drainage tube time (day)	≥ 3.5	26 (63.41)	61 (35.67)	10.519	< 0.001
	< 3.5	15 (36.59)	110 (64.33)
Forced expiratory volume in one second (%)	< 80	28 (68.28)	68 (39.77)	10.861	< 0.001
	≥ 80	13 (31.71)	103 (60.23)
White blood cell count (× 109/L)		8.42 ± 1.39	8.79 ± 1.15	-1.774	0.078
C-reactive protein (mg/L)		3.42 ± 1.51	3.73 ± 1.45	-1.220	0.224
Albumin (g/L)		39.74 ± 1.72	41.87 ± 1.62	-7.471	< 0.001
Fasting blood glucose (mmol/L)		7.02 ± 1.25	6.48 ± 1.21	2.55	0.011
Hemoglobin A1c (%)		8.12 ± 1.04	7.12 ± 1.01	5.661	< 0.001