Table 1.

Characteristics of small-cell lung cancer cases and controls from Russia, and additional replication controls from Greece, Czech Republic, Italy, and Argentina.

	Cases	Controls	Replication controls
Origin (country)
Russia	51	123
Greece			9 (8.8%)
Czech Republic			14 (13.7%)
Italy			40 (39.2%)
Argentina			39 (38.2%)
Total	51	123	102
Age at diagnosis
< 40	2 (3.9%)	2 (1.6%)	3 (2.9%)
40–49	4 (7.8%)	11 (8.9%)	15 (14.7%)
50–59	15 (29.4%)	42 (34.2%)	33 (32.4%)
60–69	22 (43.1%)	55 (44.7%)	33 (32.4%)
70 +	8 (15.7%)	13 (10.6%)	18 (17.7%)
Sex
Male	43 (84.3%)	107 (87.0%)	76 (74.5%)
Female	8 (15.7%)	16 (13.0%)	26 (25.5%)
Smoking status
Never	5 (9.8%)	35 (28.4%)	34 (33.4%)
Former	6 (11.8%)	28 (22.8%)	25 (24.5%)
Current	40 (78.4%)	60 (48.8%)	43 (42.1%)
Alcohol status
Never	30 (58.8%)	32 (26.0%)	16 (15.7%)
Former	4 (7.8%)	18 (14.6%)	14 (13.7%)
Current	17 (33.4%)	73 (59.4%)	72 (70.6%)
Tumor stage of cases
I	7 (13.7%)
II	7 (13.7%)
III	28 (54.9%)
IV	9 (17.6%)
Disease type of hospital controls
Infectious & parasitic diseases		0 (0.0%)	1 (1.0%)
Neoplasms		3 (2.4%)	0 (0.0%)
Endocrine, nutritional and metabolic diseases and immunity disorders		6 (4.9%)	1 (1.0%)
Diseases of blood and blood-forming organs		2 (1.6%)	1 (1.0%)
Diseases of the nervous system and sense organs		28 (22.8%)	6 (5.9%)
Diseases of the sense organs		0 (0.0%)	5 (4.9%)
Diseases of the circulatory system		25 (20.3%)	2 (2.0%)
Diseases of the respiratory system		3 (2.4%)	3 (2.9%)
Diseases of the digestive system		19 (15.4%)	19 (18.6%)
Diseases of the genitourinary system		19 (15.4%)	17 (16.7%)
Diseases of the skin and subcutaneous tissue		3 (2.4%)	2 (2.0%)
Diseases of the musculoskeletal system and connective tissue		9 (7.3%)	18 (17.6%)
Symptoms, signs and ill-defined conditions		0 (0.0%)	8 (7.8%)
Injury and poisoning		6 (4.9%)	18 (17.6%)
External causes		0 (0.0%)	1 (1.0%)