Table 5.

The sensitivity, specificity and positive predictive power of the multiplicative model at Nandi

V-shaped ecosystem model performance, Nandi district
Event	Epidemic positive	Epidemic negative	Total
Model positive	True positive (TP)	False positive	7
	6	1
Model negative	False negative (FN)	True negative (TN)	111
	2	109
Total	8	110	118
Sensitivity	TP/(TP + FN)		0.75
Specificity	TN/(TN + FP)		0.99
Positive predictive power	TP/(TP + FP)		0.86