Table 5.

Predictor 1, Predictor 2, Predictor 3

	Cluster 4	Other clusters	Total
Predictor 1a
Test positive	12	3	15
Test negative	11	194	205
Total	23	197	220
Predictor 2b
Test positive	22	36	58
Test negative	1	161	162
Total	23	197	220
Predictor 3c
Test positive	11	3	14
Test negative	12	194	206
Total	23	197	220

^aSensitivity = 12/23 = 52%, specificity = 194/197 = 98%

^bSensitivity = 22/23 = 96%, specificity = 161/197 = 82%

^cSensitivity = 11/23 = 48%, specificity = 194/197 = 98%