Table 3. Sensitivity, specificity, positive predictive value and negative predictive value of the different RAP indices.

	Urine microscopy
RAP indices	Negative	Positive	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)
Water contact
Negative	456c	7b	98.06	45.46	39.22	98.49
Positive	547d	353a
Total	1003	360
Self-reported blood in urine (SRBU)
Negative	917	143	60.28	91.43	71.62	86.51
Positive	86	217
Total	1003	360
Itching
Negative	870	239	33.61	86.74	47.64	78.45
Positive	133	121
Total	1003	360
Pain while urinating
Negative	738	135	62.50	73.58	45.92	84.54
Positive	265	225
Total	1003	360
Water contact + SRBU + Pain
Negative	946	183	49.17	94.32	75.64	83.79
Positive	57	177
Total	1003	360
Water contact + Itching
Negative	873c	240b	33.33	87.04	48.00	78.09
Positive	130d	120a
Total	1003	360

^{PPV, Positive predictive value; NPV, Negative predictive value; SRBU, Self-reported blood in urine;}

^a = True positive;

^b = False negative;

^c = True negative;

^d = False positive.