Sample size adequacy and statistical power assessment
A formal power calculation was conducted using the power.roc.test function from the pRoc package using the R software version 4.0.2. According to this calculation, a number of cases in the range of 50–60 and an equal number of non‐cases would result in a probability of false negative (type‐II error) from 1% to 5% (Statistical power in a range of 95%–99%) with an AUC of 0.75 or above, with a probability of false positive (type‐I error) in a range of 1%–5%. With the same number of cases and non‐cases and an AUC of 0.7, we calculated a statistical power in a range of 85% to 95%.