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Test Statistic and Sample Size for a Two-Sample McNemar Test
Eric J. Feuer and Larry G. Kessler
Vol. 45, No. 2 (Jun., 1989), pp. 629-636
Published by: International Biometric Society
Stable URL: http://www.jstor.org/stable/2531505
Page Count: 8
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McNemar's (1947, Psychometrika 12, 153-157) test of marginal homogeneity is generalized to a two-sample situation where the hypothesis of interest is that the marginal changes in each of two independently sampled tables are equal. This situation is especially applicable to two cohorts (a control and an intervention cohort), each measured at baseline and after the intervention on a binary outcome variable. Some assumptions often realistic in this situation simplify the calculation of sample size. The calculation of sample size in a study designed to increase utilization of breast cancer screening is demonstrated.
Biometrics © 1989 International Biometric Society