Abstract
This is a retrospective study of 520 patients with lung cancer, seen at the Tata Memorial Hospital between 1963 and 1970. Matched controls were obtained from those patients who came to the hospital within the same period and who were diagnosed as not having cancer. The patients and controls were matched for age, sex and community. As reported in other studies, an association was found between smoking habit and lung cancer. The relative risk of all types of smokers to non-smokers is 2·45, of bidi smokers 2·64 and of cigarette smokers 2·23. There is a preponderance of the group of epidermoid carcinomata among smokers as against adenocarcinomata. The probable reasons for the reported low incidence of lung cancer in this population have been discussed.
Highlights
Summary.-This is a retrospective study of 520 patients with lung cancer, seen at the Tata Memorial Hospital between 1963 and 1970
Matched controls were sought from those patients who came to the hospital over the same period but were diagnosed as not having cancer
This study has shown that the relative risk of lung cancer in smokers was significantly high compared with nonsmokers
Summary
Summary.-This is a retrospective study of 520 patients with lung cancer, seen at the Tata Memorial Hospital between 1963 and 1970. As reported in other studies, an association was found between smoking habit and lung cancer. Sanghvi, Rao and Khanolkar (1955) brought out the role of bidi (small, hand rolled Indian cigarette) smoking in addition to chewing of tobacco in these cancers. Several studies carried out subsequently have confirmed these findings (Shanta and Krishnamurthy, 1963; Hirayama, 1966; Wahi, 1968; Jussawalla and Deshpande, 1971). It appears that the time may be ripe to investigate the role of smoking habits, and bidi smoking in particular, in relation to lung cancer. On the other hand, is a comparative newcomer on the Indian scene and is increasing
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