The Diagnostic Value of Quantitative CT Analysis of Ground-Glass Volume Percentage in Differentiating Epidermal Growth Factor Receptor Mutation and Subtypes in Lung Adenocarcinoma

Table 1

Patient Characteristics.

Characteristic	EGFR Mutation+	EGFR Mutation-	P Value
No. of patients	163	146
Age (y)	51 ± 13	50 ± 14	p = 0.854
Sex
Female	90	54	p = 0.001
Male	73	92
Smoking
Never smoked	97	56	p < 0.001
Smoker	66	90

Note: Age compared using independent t-tests.
The rest groups were analyzed using χ2 tests.