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dc.titleIncidence rates of specific histological types of lung cancer in Singapore Chinese dialect groups, and their aetiological significance
dc.contributor.authorLaw, C.H.
dc.contributor.authorDay, N.E.
dc.contributor.authorShanmugaratnam, K.
dc.identifier.citationLaw, C.H., Day, N.E., Shanmugaratnam, K. (1976). Incidence rates of specific histological types of lung cancer in Singapore Chinese dialect groups, and their aetiological significance. International Journal of Cancer 17 (3) : 304-309. ScholarBank@NUS Repository.
dc.description.abstractSignificant differences in the incidence levels of lung cancer were observed among major Chinese dialect groups or communities (Hokkien, Teochew and Cantonese) in Singapore. Among males, the incidence rate is highest in the Hokkiens (age standardized incidence rate per 100,000 persons per year in Hokkien 67.8, Teochew 55.3, Cantonese 54.0), and among females, it is highest in the Cantonese (Hokkien 12.4, Teochew 12.8, Cantonese 27.2). The present investigation was undertaken to determine the incidence rates of each of the main histologic types of lung cancer in the Chinese population and to determine whether there are any correlations between histologic patterns and the dialect group differentials that may be of etiologic significance. During the period 1968-1972, a total of 1,747 cases of lung cancer (1,285 males and 462 females) were reported to the Singapore Cancer Registry. It proved possible to type the neoplasms histologically in 476 males (37.0%) and 154 females (33.3%). Age standardized rates by histologic type were computed on the assumption that those histologically typed were a representative sample of all lung cancers. This study shows that Hokkien males have a significantly higher incidence rate of epidermoid carcinoma that the other dialect groups (Hokkien 36.1, Teochew 21.1, Cantonese 17.3). The Cantonese females have significantly higher incidence rates of both epidermoid carcinoma (Hokkien 3.7, Teochew 2.3, Cantonese 5.9) and adenocarcinoma (Hokkien 4.6, Teochew 3.6, Cantonese 11.9). Various sources of bias in studies of this type were examined; it is concluded that the differences in the histologic specific incidence rates of lung cancer among the various Chinese dialect groups in Singapore are real and not artefactual. The significance of these findings in relation to possible etiologic factors is discussed.
dc.description.sourcetitleInternational Journal of Cancer
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