Table IV.

Logistic analysis of variables associated with EGFR mutations from NSCLC patients.

Variable	B	Standard error	Wald	df	P-value	Exp (B)	95% CI for Exp (B)
Gender	0.885	0.349	6.438	1	0.011	2.423	1.23–4.799
Pathological type	−0.947	0.459	4.262	1	0.039	0.388	0.158–0.953
Distant metastasis	1.029	0.359	8.198	1	0.004	2.798	1.383–5.658
Chemotherapy	−1.011	0.370	7.458	1	0.006	0.364	0.176–0.752

EGFR, epidermal growth factor receptor; NSCLC, non-small cell lung cancer; df, degree of freedom; CI, confidence interval; Exp, odds ratio; Wald, Chi-square value = (B/standard error)².