Table 3. Sensitivity and specificity of the six different phenotypic tests.

Performance characteristics (compared to presence of carbapenemase genes)	MHT	THT	CNPt	CNPt-direct	BCT	CIM
Sensitivity, % (95% CI)	75.5 (68.4–82.7)	84.9 (78.9–90.9)	66.2 (58.3–74.1)	92.8 (88.5–97.1)	82.0 (75.6–88.4)	93.5 (89.4–97.6)
Specificity, % (95% CI)	94.0 (89.7–98.3)	91.5 (86.4–96.5)	100 (96.9–100)*	100 (96.9–100)*	100 (96.9–100)*	100 (96.9–100)*

^*These data were determined by the exact McNemar's test. Other data were determined by the asymptotic McNemar's test.

Abbreviations: MHT, modified Hodge test; THT, Triton Hodge test; CNPt, Carba NP test; CNPt-direct, simplified Carba NP test; BCT, blue-Carba NP test; CIM, carbapenem inactivation method; CI, confidence interval.