Clinical efficacy and safety of maintenance therapy for advanced non-small cell lung cancer: a retrospective real-world study

Table 2 Multivariate analysis through Cox regression model for OS in advanced NSCLC patients

Variate	Classification	Regression coefficient	Standard error	P value	Odds ratio	95% CI
Maintenance	Yes/no	− 0.854	0.238	< 0.0001	0.412	0.22–0.59
Gender	Woman/man	0.678	0.678	0.039	1.335	1.08–3.84
Clinical stage	IIIb/IV	0.732	0.732	0.065	1.886	0.97–3.06
Age	< 65 / ≥ 65 years	0.398	0.398	0.078	1.248	0.78–1.85
Distant metastasis	No/yes	0.232	0.232	0.148	1.325	0.44–2.12
Pathological type	Adenocarcinomas/squamous	0.328	0.328	0.237	1.433	0.81–1.97
Smoking history	No/yes	− 0.258	− 0.258	0.468	0.680	0.54–2.38

P value was calculated by Cox regression model and odds ratio was showed as the ratio of risk of death between the two classifications in each variate

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