Table 2. Random forest variable importance.

BCI: Bladder contractility index, FRAILTY: pre-frailty and frailty, D72hFE: daytime frequency within a 72-hour period

Predictor	%IncMSE	IncNodePurity
Age	0.0044769	1.8020206
FRAILTY	0.0360636	2.8095423
D72hFE	0.0858477	6.3093305
Nocturia episodes (72 h)	0.0111649	1.3528381
BCI	-0.000607	0.6661288
Voiding efficiency	0.0090423	2.3126757
Cystometric bladder capacity	0.0035157	1.5981565