Table 3. Comparison of the field and laboratory performance of the cholera dipstick test.

(n = 67)	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. (%) with V. cholera isolated on stool culture**
Field	90.0 (76.3–97.2) (36/40)	55.6 (35.3–74.5) (15/27)	75.0 (60.4–86.4) (36/48)	78.9 (54.4–93.9) (15/19)	40 (59.7)
Laboratory	87.5 (73.2–95.8) (35/40)	74.1 (53.7–88.9) (20/27)	83.3 (68.6–93.0) (35/42)	80.0 (59.3–93.2) (20/25)	40 (59.7)
P ***	0.931	0.510	0.740	0.977

^*using exact method.

^**rapid diagnostic testing was done both in the field and in the laboratory on specimens from the same stool samples.

^***using McNemars test.