DPO Cut-off titer MAT AND/OR Cut-off titer IgM ELISA Sensitivity (%) 95% CI Specificity (%) 95% CI
1-10 ≥1:80 AND ≥1:40 10.4 5.8-18.1 100.0 94.2-100.0
≥1:80 OR ≥1:40 33.3 24.7-43.2 90.3 80.4-95.5
≥1:80 AND ≥1:80 10.4 5.8-18.1 100.0 94.2-100.0
≥1:80 OR ≥1:80 27.1 19.2-36.7 93.5 84.6-97.5
≥1:160 AND ≥1:40 6.3 2.9-13.0 100.0 94.2-100.0
≥1:160 OR ≥1:40 31.3 22.9-41.1 96.8 89.0-99.1
≥1:160 AND ≥1:80 6.3 2.9-13.0 100.0 94.2-100.0
≥1:160 OR ≥1:80 25.0 17.4-34.5 100.0 94.2-100.0
11-20 ≥1:80 AND ≥1:40 90.0 79.9-95.3 98.4 91.5-99.7
≥1:80 OR ≥1:40 96.7 88.6-99.1 85.7 75.0-92.3
≥1:80 AND ≥1:80 86.7 75.8-93.1 100.0 94.2-100.0
≥1:80 OR ≥1:80 95.0 86.3-98.3 90.5 80.7-95.6
≥1:160 AND ≥1:40 81.7 70.1-89.4 100.0 94.2-100.0
≥1:160 OR ≥1:40 96.7 88.6-99.1 93.7 84.8-97.5
≥1:160 AND ≥1:80 80.0 68.2-88.2 100.0 94.2-100.0
≥1:160 OR ≥1:80 93.3 84.1-97.4 100.0 94.2-100.0
>20 ≥1:80 AND ≥1:40 81.5 70.4-89.1 98.4 91.5-99.7
≥1:80 OR ≥1:40 95.4 87.3-98.4 85.7 75.0-92.3
≥1:80 AND ≥1:80 67.7 55.6-77.8 100.0 94.2-100.0
≥1:80 OR ≥1:80 90.8 81.3-95.7 90.5 80.7-95.6
≥1:160 AND ≥1:40 76.9 65.4-85.5 100.0 94.2-100.0
≥1:160 OR ≥1:40 93.8 85.2-97.6 93.7 84.8-97.5
≥1:160 AND ≥1:80 63.1 50.9-73.8 100.0 94.2-100.0
≥1:160 OR ≥1:80 89.2 79.4-94.7 100.0 94.2-100.0
Bold text indicates the optimal cut-off for sensitivity and specificity combinations with priority on a high specificity.
Table 3: Optimal sensitivity and specificity by combining MAT and IgM ELISA results.