Table II.

Distribution of epidermal growth factor receptor mutations according to patient characteristics.

Characteristic	No. of patients	No. of EGFR mutated cases (%)
Total analysed	515	59 (11.5)
Males/females	357/158	24/35 (6.7/22.2)
Age (years)
<45	17	4 (23.5)
45–50	37	7 (18.9)
51–60	98	12 (12.2)
>60	363	36 (9.9)
Smoking status
Smoker	174	6 (3.4)
Former smoker	209	15 (7.2)
Never smoked	70	37 (52.9)
Unknown	62	1 (1.6)
Tumour status
Primary tumour	452	51 (11.3)
Metastasis
Sample type	63	8 (12.7)
Biopsy	429	49 (11.4)
Surgical	86	10 (11.6)