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

Table 2 Comparison of general data, mean ± SD/n (%)

Items		Infected group (n = 41)	Non-infected group (n = 171)	t/χ2 value	P value
Age (years old)	≥ 70	27 (65.85)	76 (44.44)	4.767	0.029
	60-69	14 (34.15)	95 (55.55)
Sex (cases)	Male	24 (58.54)	112 (65.50)	0.697	0.404
	Female	17 (41.46)	59 (34.50)
Body mass index (kg/m2)		25.42 ± 2.13	24.79 ± 2.09	1.547	0.123
Smoking history	With	23 (56.10)	101 (59.06)	0.120	0.729
	Without	18 (43.90)	70 (40.94)
Drinking history	With	22 (53.66)	79 (46.20)	0.738	0.390
	Without	19 (46.34)	92 (53.80)
Hypertension	With	27 (65.85)	94 (54.97)	1.599	0.206
	Without	14 (34.15)	77 (45.03)
Hyperlipidemia	With	14 (34.15)	82 (47.95)	2.544	0.111
	Without	27 (65.85)	89 (52.05)
Respiratory diseases	With	25 (60.98)	71 (41.52)	5.052	0.026
	Without	16 (39.02)	100 (58.48)
TNM stage	I stage	16 (39.02)	98 (57.31)	4.448	0.035
	II-III stage	25 (60.98)	73 (42.69)
Maximum diameter of tumor	≥ 4 cm	22 (53.66)	60 (35.09)	4.809	0.028
	< 4 cm	19 (46.34)	111 (64.91)
Neoadjuvant chemotherapy	≥ 2 times	27 (65.85)	64 (37.43)	10.908	< 0.001
	< 2 times	14 (34.15)	107 (62.57)
Pathological type	Squamous carcinoma	22 (53.66)	111 (64.91)	1.792	0.181
	Adenocarcinoma	19 (46.34)	60 (35.09)

TNM: Tumor node metastasis.