Table 2. Relationships between postoperative complications and clinical factors.

Factors	Postoperative complications		p-value
	Present (n = 5, 14%)	Absent (n = 30, 86%)
Sex			1.00
Male	2 (17%)	10 (83%)
Female	3 (13%)	20 (87%)
Age (years), median (range)	71 (66–78)	66 (39–84)	0.310
PYI, median (range)	0 (0–46)	0 (0–120)	0.676
Blood loss (mL), median (range)	0 (0–50)	0 (0–100)	0.745
Operation time (min), median (range)	309 (220–375)	239.5 (182–499)	0.125
Console time (min), median (range)	170 (145–251)	177.5 (120–346)	0.850
Stapler used (units), median (range)	5 (4–9)	5 (2–10)	0.616
Pathological stages			1.000
0–IIA	5 (16%)	26 (84%)
IIB–III	0 (0%)	3 (100%)
Other	0 (0%)	1 (100%)
Drainage day, median (range)	4 (2–9)	1 (1–4)	0.001
Hospital stay (days), median (range)	13 (10–14)	8 (5–13)	0.001

PYI: pack-year index