Table 6 Performance results for a putative qualitative diagnostic test modeled against the quantitative results described in Table 3
10% cut-off | 20% cut-off | 30% cut-off | 60% cut-off | |
|---|---|---|---|---|
Cutoff value (U/g Hb) | 1.07 | 2.14 | 3.21 | 6.42 |
Number of samples with G6PD levels less than cut-off (percentage) | 14 (2.8) | 24 (4.8) | 28 (5.6) | 41 (8.2) |
Sensitivity percentage (95% CI) | 100 | 95.8 | 89.3 | 68.3 |
(73–100) | (77–100) | (71–97) | (52–81) | |
Specificity percentage (95% CI) | 97.1 | 98.9 | 99.4 | 100 |
(95–98) | (97–100) | (98–100) | (99–100) | |
Positive predictive value percentage (95% CI) | 0.5 | 0.82 | 0.89 | 1.00 |
(0.31-0.69) | (0.62-0.93) | (0.71-0.97) | (0.84-1.00) | |
Negative predictive value percentage (95% CI) | 1.00 | 1.00 | 0.99 | 0.97 |
(0.99-1.00) | (0.99-1.00) | (0.98-1.00) | (0.95-0.98) |