TABLE 1.
PPA and overall percent agreement between the Luminex xTAG GPP and bacterial culture of stool and rectal swab specimensa
| Bacterial targets | Luminex xTAG GPP result | No. of specimens with the following bacterial culture result: |
PPA (95% CI) | Overall % agreement (95% CI) | Cohen’s ĸ | |
|---|---|---|---|---|---|---|
| Positive | Negative | |||||
| Campylobacter spp. | Positive | 20 | 2 | 87.0 (65.3, 96.6) | 99.8 (99.6, 99.9) | 0.89 |
| Negative | 3 | 3,064 | ||||
| Escherichia coli O157 | Positive | 6 | 4 | 100 (51.7, 100) | 99.9 (99.6, 99.9) | 0.75 |
| Negative | 0 | 3,079 | ||||
| Salmonella spp. | Positive | 43 | 9 | 78.2 (64.6, 87.8) | 99.3 (98.9, 99.6) | 0.80 |
| Negative | 12 | 3,025 | ||||
| Shigella spp. | Positive | 5 | 3 | 100 (46.3, 100) | 99.9 (99.7, 99.97) | 0.77 |
| Negative | 0 | 3,081 | ||||
| Total | Positive | 73 | 18 | 83.0 (73.1, 89.8) | 98.9 (98.5, 99.25) | 0.81 |
| Negative | 15 | 2,983 | ||||
a
The bacterial targets included in this table were identified by both the Luminex xTAG gastrointestinal pathogen panel (GPP) and bacterial culture.