A method is developed for utilizing historical control information in testing for a trend in proportions. The resulting test statistic is a modification of the statistic proposed by Cochran (1954, Biometrics 10, 417-451) and by Armitage (1955, Biometrics 11, 375-386). The contribution of the historical data in the analysis depends upon the degree of heterogeneity of the historical rates.
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The International Biometric Society is an international society for the advancement of biological science through the development of quantitative theories and the application, development and dissemination of effective mathematical and statistical techniques. The Society welcomes as members biologists, mathematicians, statisticians, and others interested in applying similar techniques.
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Biometrics
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