Closed thoracic drainage in elderly patients with chronic obstructive pulmonary disease complicated with spontaneous pneumothorax: A retrospective study

Table 1 Comparison of basic information of indwelling pleural catheters group and central venous catheters group

Groups	Cases	Gender	Age (year)	BMI (kg/m2)
		Male/female		< 18.5	18.5-24.9	25-29.9	> 30
IPC group	42	26/16	69.81 ± 7.79	3	29	6	4
CVC group	18	11/7	71.06 ± 7.70	1	12	5	0
t/χ2		-0.57	-0.57	-0.167
P value		0.954	0.571	0.867

IPC: Indwelling pleural catheter; CVC: Central venous catheter; BMI: Body Mass Index.