Sample size required for univariate logistic regression having an overall event proportion P and an odds ratio r at one standard deviation above the mean of the covariate when a= 5 per cent (one-tailed) and 1-8=70 per cent
Sample size required for univariate logistic regression having an overall event proportion P and an odds ratio r at one standarddeviation above the mean of the covariate when a= 5 per cent (one-tailed) and 1-8=70 per cent