Table 1.

Characteristics of patients by status of post-operative cough.

Variables	Cough (+)	Cough (-)
Total no.	13	4
Onset
More than 7 days of OP	13
Age in years
Median (range)	66 (48–72)	66(36–68)
Gender
Male	6	2
Female	7	2
Disease
Lung cancer	13	4
Surgery
Lobectomy	13	4
Post-operative days
Median (range)	18 (15–26)	18(18–24)
Mediastinal lymph node resection
Yes	13	4
Operation side
Right	9	2
Left	4	2
Height (cm)
Median (range)	161 (149–172)	159(158–177)
Weight (kg)
Median (range)	56 (45–68)	50(45–75)
BSA (cm2)
Median (range)	1.6 (1.4–1.8)	1.5(1.4–1.9)
BMI
Median (range)	23.0 (18.2–25.9)	23.3(17.8–23.9)

OP: operation