Table 1.

Criteria for medically unfit patients (total 111 patients)

Variable	Number (%)
Preoperative FEV1 or DLCO ≤ 50%	42 (37.8)
Age ≥ 80 years old	46 (41.4)
Age ≥ 75 years old & FEV1 or DLCO ≤ 60%	19 (17.1)
Combined second primary solid malignancy	34 (30.4)
Other comorbidity	11 (9.9)
ESRD under HD	2 (1.8)
Poor LV function: EF ≤ 0.4	3 (2.7)
Recent stroke	3 (2.7)
Intraoperative factors	3 (2.7)

Fit one of above criteria were defined as medically unfit. FEV1 = forced expiratory volume in one second.

DLCO, diffuse capacity of the lung for carbon monoxide; ESRD, end‐stage renal disease; LV, left ventricle.