Function to calculate variance function (VF) of the area under the curve (AUC) for the receiver operator characteristic (ROC) curve sample size calculations

Function to calculate variance function (VF) of the area under the curve (AUC) for the receiver operator characteristic (ROC) curve sample size calculations

get_vf_roc(A, p)

Arguments

A	Binormal distribution parameter
p	Prevalence or proportion of cases in the relevant population. Used to calculate ratio k of cases to non-cases in the relevant population

Source

Obuchowski NA. Fundamentals of clinical research for radiologists: ROC Analysis. American Journal of Roentgenology. 2005;184.

Value

A numeric value for variance function (VF) of the area under the curve (AUC) for the receiver operator characteristic (ROC) curve sample size calculations

Examples

  get_vf_roc(A = 2, p = 0.5)
#> [1] 0.05359277