Table 2.

Urine Cytology.

Analysis	WLC	WLC + H	FUS	FUT
tprev	0.1859	0.1624	0.1565	0.1644
SE	0.28	0.2727	0.2609	0.2708
SP	0.9817	0.9692	0.9677	0.9713
PPV	0.7778	0.6316	0.6	0.65
NPV	0.8566	0.873	0.8759	0.8713

Sensitivity (SE) and specificity (SP) of urine cytology according to the four reference definitions: white-light cystoscopy (WLC), white-light cystoscopy and histology (WLC + H), simple follow-up (FUS) and total follow-up (FUT). True prevalence (tprev).