Table 2 Primary malignancies found in the study population.

Primary malignancy	No of patients	No of ever smokers (% by malignancy type)
Group 1
Head/neck	11	9 (82)
Group 2
Bladder	12	9 (75)
Breast	64	41 (64)
Cervix	1	0 (0)
Oesophagus	2	1 (50)
Ovary	2	1 (50)
Prostate	15	11 (73)
Subtotal	96	63 (67)
Group 3
Colon	15	10 (67)
Rectum	4	2 (50)
Liver	1	1 (100)
Carcinoid	1	1 (100)
Adrenal	1	0 (0)
Kidney	6	1 (17)
Uterus	6	3 (50)
Subtotal	34	18 (53)
Group 4
Thymus	1	0 (0)
Melanoma	8	6 (75)
Sarcoma*	7	5 (71)
Testes	4	3 (75)
Kaposi's sarcoma	2	2 (100)
Subtotal	22	16 (73)
Total†	151	101 (67)

*Includes one case each of benign metastasising leiomyosarcoma, osteogenic sarcoma, uterine sarcoma, synovial cell sarcoma, and chondrosarcoma, as well as two cases of unspecified sarcomas.

†All tumour types were analysed individually. Because some patients had more than one primary tumour, the sum of all figures in a given column may exceed that reported as the total.