Table 2. Sensitivity and specificity of Shigella RLDT compared to qPCR.

Shigella qPCR (as the gold standard) vs RLDT
Total samples screened	Samples positive by RLDT (%)	Samples positive by qPCR (%)	False positive	False negative	Sensitivity (%)	Specificity (%)
Overall (includes both study 1 and study 2)
367	9 (2.5%)	9 (2.5%)	0	0	100	100
Study 1 (Hospital-based surveillance in Bangladesh)
261	6 (2.3)	6 (2.3)	0	0	100	100
Study 2 (overall travelers to Guatemala and Mexico)
106	3 (2.8)	3 (2.8)	0	0	100	100
Study 2 (travelers with MSD only)
39	2 (5.1)	2 (5.1)	0	0	100	100
Study 2 (asymptomatic travelers only)
67	1 (1.5)	1 (1.5)	0	0	100	100