PRL and adenoma: When correcting for the imbalance in adenoma size in male patients, we derive higher prolactin thresholds for the entire cohort and the male subgroup with 460.9 μg/L (95% credible interval: 216.1–793.3 μg/L) and 1,326.0 μg/L (95% credible interval: 875.4–2,211.9 μg/L), respectively.