Table 2. Stratified analysis of the performance of cholera dipstick test according to fluid management (oral rehydration or intravenous fluids) in 592 patients and recent antibiotic intake (yes or no) in 576 patients.

	Sensitivity (95%CI)* (TP/(TP+FN))	Specificity (95%CI)* (TN/(TN+FP))	PPV (95%CI)* (TP/(TP+FP))	NPV (95%CI)* (TN/(TN+FN))	No. pos./total (%) with V. cholerae isolated on stool culture
Fluid management (n = 592)
Oral rehydration n = 210	93.8 (79.2–99.2) (30/32)	53.9 (46.3–61.4) (96/178)	26.8 (18.9–36.0) (30/112)	98.0 (92.8–99.8) (96/98)	32**/210 (15.2)
Intravenous rehydrationn = 382	92.7 (87.6–96.1) (153/165)	42.9 (36.2–49.7) (93/217)	55.2 (49.2–61.2) (153/277)	88.6 (80.9–94.0) (93/105)	165**/382 (43.2)
p	0.97	0.19	<0.01	0.62	<0.01
Recent antibiotic (AB) intake (n = 576)
AB received n = 58	93.8 (69.7–99.8) (15/16)	59.5 (43.3–74.4) (25/42)	46.9 (29.1–65.3) (15/32)	96.2 (80.4–99.9) (25/26)	16/58 (27.6)
No AB received n = 519	92.8 (87.8–96.2) (155/167)	49.3 (43.9–54.7) (173/351)	46.5 (41.1–52.1) (155/333)	93.5 (86.1–94.7) (173/190)	167/518 (32.2)
p	0.98	0.48	0.98	0.86	0.60

^*using exact method.

^**in 6/203 culture positive cases no rehydration treatment was provided.