Table 3. Conditional logistic regression analysis for mutation subtypes among EGFR-mutant lung adenocarcinoma patients with or without family lung cancer history (1:2 matching, n = 248).

EGFR mutation types	Odds ratio	95% CI	P value
With vs. Without family history
Exon 18 G719X	3.33	0.80–13.95	0.100
Exon 19 deletions	1.05	0.62–1.80	0.855
Exon 21 L858R	0.89	0.53–1.49	0.659
Other uncommon mutations	0.83	0.29~2.37	0.732

EGFR, epidermal growth factor receptor; CI, confidence interval.