Table 2.

The association between overall survival and progression free survival was calculated by Cox regression models.

Factors	P1 value	HR	95% CI	P2 value	HR	95% CI
Gender	0.352	0.682	0.305–1.525	0.123	0.354	0.095–1.323
Age	0.231	1.495	0.775–2.884	0.201	2.130	0.669–6.783
Stage	0.715			0.216
Genotype	0.782			0.130
19deletion	0.829	0.921	0.436–1.946	0.811	0.826	0.171–3.963
21mutation	0.655	1.225	0.504–2.977	0.170	2.991	14.304
Smoke	0.462			0.507
Smoker	0.242	0.526	0.180–1.543	0.261	0.354	0.058–2.164
Ex-smoker	0.312	0.511	0.139–1.876	0.667	0.642	0.085–4.83
Firstline	0.923			0.646
Surgery	0.967	0.977	0.334–2.856	0.963	0.949	0.105–8.580
Complication	0.112	1.706	0.882–3.299	0.212	0.422	0.109–1.636

P1 value, P value of overall survival; HR, hazard ratio; 95% CI, 95% confidence intervals; P2 value, P value of progression free survival. P values <0.05 were considered statistically significant, with 95% confidence intervals.