R version 4.6.0 alpha (2026-03-28 r89738 ucrt)
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> library(testthat)
> library(clinicalfair)
> test_check("clinicalfair")

-- Fairness evaluation data 
n = 50 | prevalence = 0.2
Groups: "X, Y"
Reference: "Y" | Threshold: 0.5

-- Fairness Report 
Reference group: "Black"

! 3 disparity flag(s):
White / selection_rate: ratio = 0.51
White / tpr: ratio = 0.635
White / fpr: ratio = 0.262

3 metric(s) violate the four-fifths rule (ratio outside [0.8, 1.25]). Consider
threshold adjustment or model recalibration.

-- Threshold optimization (equalized_odds) 
Black: threshold = 0.58
White: threshold = 0.42

Accuracy: 0.794 -> 0.808
[ FAIL 0 | WARN 0 | SKIP 0 | PASS 38 ]
> 
> 
> proc.time()
   user  system elapsed 
   2.89    0.37    3.23