TABLE 1.

Clinical evaluation of CWP1 as a diagnostic marker with the TechLab Giardia Test^a

TechLab Giardia Test parameter	Result for:
	Study 1 (Sacred Heart Medical Center, Spokane, Wash.)	Study 2 (Dekalb Medical Center, Decatur, Ga.)	Study 3 (VRL, San Antonio, Tex.)
Total no. of stools	114	221	200
Total no. positive	31	46	16
Total no. negative	79	175	180
Total no. of discrepancies	4	0	4
% Sensitivity	91.4	100.0	100.0
% Specificity	100.0	100.0	97.8
Positive predictive value (%)	100.0	100.0	80.0
Negative predictive value (%)	96.3	100.0	100.0
% Correlation	97.4	100.0	98.0

^aThe ELISA was performed as instructed by the manufacturer. O&P was done by in-house methods implemented at each study site. All stool specimens were preserved in 10% buffered formalin.