Table 2 Univariate and multivariate analyses of factors associated with overall survival of NSCLC patients

Age, years (≤60 vs >60)

Gender (male vs female)

Histological type (ADC vs non-ADC)

Smoking status (smoker vs nonsmoker)

Differentiation (well-moderate vs poor)

Tumor status (T1-T2 vs T3-T4)

1.248

0.749-2.687

0.034

TNM stage (I-II vs III)

1.894

0.948-4.679

0.015

IL-37 expression (low vs high)

2.047

1.211-5.145

0.011