Bronchial cancer - a clinical and pathological study. II. Frequency according to age and sex during a 12-year period.
A necropsy series of bronchial cancer combined with a retrospective clinical study comprising 747 cases of bronchial cancer from a defined population is described. A significant successive increase in the frequency of bronchial cancer during the 12-year period 1958-1969 was found. The increase during three successive 3-year periods will be as much as 45, 86 and 146%, respectively, if the 1958-1960 frequency is set to 100%. In contrast to many other investigations this increase was found in both women and men (the relative increase was exactly the same in both sexes) and for both Group I and Group II tumours. The ratios between men and women and between Group I and Group II tumours in the present material were thus constant throughout the investigation. This may be explained by the assumption that the female population today has smoked cigarettes for a sufficiently long period to stimulate the development of bronchial cancer and that there seems also to be a correlation between Group II tumours and cigarette smoking.
D000230:Adenocarcinoma / Q000453:epidemiology; D002282:Adenocarcinoma, Bronchiolo-Alveolar / Q000453:epidemiology; D000328:Adult; D000367:Age Factors; D000368:Aged; D001984:Bronchial Neoplasms / Q000453:epidemiology* / Q000473:pathology; D002276:Carcinoid Tumor / Q000453:epidemiology; D002283:Carcinoma, Bronchogenic / Q000453:epidemiology; D018288:Carcinoma, Small Cell / Q000453:epidemiology; D002294:Carcinoma, Squamous Cell / Q000453:epidemiology; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000453:epidemiology* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012737:Sex Factors; D012907:Smoking