Table 2. Risk factors affecting mortality in the first 90 days.

	Mortality negative		Mortality positive		p
		n	%	n		%
Age (year)					0.475
<65	31	88.6	4	100
>65	4	11.4	0	0
Sex					0.732
Male	34	971	4	100
Female	1	2.9	0	0
Side					0.609
Left	12	34.3	2	50
Right	23	65.7	2	50
Charlson Comorbidity Index					0.318
2	20	57.1	1	25
>2	15	42.9	3	75
Induction treatment					0.323
CHT	7	20	0	0
CHT-RT	28	80	4	100
Induction treatment chemotherapy cycles					0.556
2	10	28.6	0	0
4-6	25	71.4	4	100
Radiotherapy dose					0.279
<60 Gy	18	64.3	1	25
>60 Gy	10	35.7	3	75
yTNM					0.179
I	16	45.7	0	0
II	18	51.4	4	100
III	1	2.9	0	0
Resection					0.099
Lobectomy	25	71.4	1	25
Pneumonectomy	10	28.6	3	75
Histopathology					0.792
Adenocarcinoma	11	31.4	1	25
SqCC	24	68.6	3	75
Adjuvant					0.556
Negative	25	71.4	4	100
Positive	10	28.6	0	0
CHT: Chemotherapy; RT: Radiotherapy; Gy: Gray; SqCC: Squamous Cell Carcinoma; yTNM: Tumor, nodes, and metastases after induction therapy.