Chinese never smokers with adenocarcinoma of the lung are younger and have fewer lymph node metastases than smokers

Table 5 Logistic regression analysis of TNM in adenocacinoma patients

Independent variables	OR	95% CI of OR		P value
Independent variables	OR	Upper	Lower	P value
Smoking Status	1.18	14.43	0.09	0.896
Age at diagnosis	0.92	0.99	0.84	0.040
Gender(Male)	1.41	9.80	0.22	0.72
Tumor size	17.51*	99.51	5.36	< 0.001
LNMets	265.40	2857.80	60.10	< 0.001
Metastasis	1.87 × 10¹¹	NA	1.15 × 10^− 68	0.99

*Tumor size, LNMets and Metastasiswere regarded as numeric variables, OR was calculated for each 1-stage increase in tumor size

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