Table 1.

Clinical characteristics of 90 SCLC patients.

Characteristics		Total (cases)	Percentage (%)
Age (years)
	≤ 60	57	63%
	> 60	33	37%
Gender
	Male	75	83%
	Female	15	17%
Smoking status
	Non-smoker	22	24%
	smoker	68	76%
Vascular invasion
	No	15	17%
	Yes	21	23%
	Unknown	54	60%
Lymph Node Metastasis
	No	26	≈29%
	Yes	64	≈71%
TNM stage
	I	24	≈27%
	II	47	≈52%
	III	19	≈21%