Table 3.
Evaluation of the Algorithm to semi-quantify microbial growth (<102 to ≥105).
| Sample type | Media | N | Accuracy | CI | Accuracy.pm1 | CI pm1 |
|---|---|---|---|---|---|---|
| All | All | 1796 | 80.2 | (78.3, 82) | 98.6 | (97.9, 99.1) |
| All | CHROM | 701 | 78.9 | (75.6, 81.9) | 96.9 | (95.6, 98.1) |
| All | COL | 727 | 75.9 | (72.8, 78.8) | 99.7 | (99.3, 100) |
| All | MAC | 368 | 91 | (88, 93.8) | 99.5 | (98.6, 100) |
| Isolates | All | 1392 | 76.9 | (74.6, 79.2) | 98.3 | (97.6, 98.9) |
| Isolates | CHROM | 565 | 76.5 | (72.7, 80) | 96.1 | (94.5, 97.7) |
| Isolates | COL | 589 | 72.2 | (68.6, 75.7) | 99.7 | (99.2, 100) |
| Isolates | MAC | 238 | 89.5 | (85.7, 92.9) | 100 | (98.4, 100) |
| Urines | All | 404 | 91.6 | (88.4, 94.3) | 99.5 | (98.8, 100) |
| Urines | CHROM | 136 | 89 | (83.8, 94.1) | 100 | (97.3, 100) |
| Urines | COL | 138 | 92 | (87, 96.4) | 100 | (97.3, 100) |
| Urines | MAC | 130 | 93.8 | (89.2, 97.7) | 98.5 | (96.2, 100) |
Abbreviations: All: all sample types or all media types; CHROM: BD BBL CHROMagar Orientation; COL: BD Columbia Agar with 5% Sheep Blood; MAC: BD MacConkey II Agar; N: Number of analyzed samples; CI: 95% confidence interval; Accuracy.pm1: accuracy with a plus or minus 1 log difference tolerance; CI.pm1: 95% confidence interval for the accuracy.pm1.