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  "Description": "Estimation of the required sample size to validate a risk\nmodel for binary outcomes, based on the sample size equations\nproposed by Pavlou et al. (2021)\n<doi:10.1177/09622802211007522>. For precision-based sample\nsize calculations, the user is required to enter the\nanticipated values of the C-statistic and outcome prevalence,\nwhich can be obtained from a previous study. The user also\nneeds to specify the required precision (standard error) for\nthe C-statistic, the calibration slope and the calibration in\nthe large. The calculations are valid under the assumption of\nmarginal normality for the distribution of the linear\npredictor.",
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