Table 2. Predicted tacrolimus stable doses with the regression tree algorithm compared with the actual stable dose in the derivation and validation cohorts.

Cohort	Mean Absolute Error (95% CI) mg/day
	Derivation cohort	Validation cohort
Overall	0.71 (0.66–0.75)	0.73 (0.63–0.84)
≤2.5 mg/day	1.31 (1.20–1.42)	1.33 (1.13–1.53)
>2.5 mg/day to <4 mg/day	0.50 (0.46–0.54)	0.48 (0.39–0.58)
≥4 mg/day	1.07 (0.96–1.18)	1.14 (0.92–1.37)