pH < 7.2 | pH < 7.1 | pH < 7.0 | |||||||
---|---|---|---|---|---|---|---|---|---|
IAa | IA + FSSTb | p-value | IA | IA + FSST | p-value | IA | IA + FSST | p-value | |
Prevalence | 20% | 15% | 0.070 | 13% | 11% | 0.597 | 6% | 4% | 0.237 |
Sensitivity (95% CI) | 22% (11–35%) | 31% (17–48%) | 0.321 | 13% (4–30%) | 34% (18–54%) | 0.048 | 27% (8–55%) | 70% (35–93%) | 0.032 |
Specificity (95% CI) | 89% (83–93%) | 90% (86–94%) | 0.533 | 86% (81–91%) | 90% (85–93%) | 0.239 | 87% (82–91%) | 89% (85–93%) | 0.444 |
PPV (95% CI) | 32% (17–51%) | 35% (20–54%) | 0.798 | 12% (3–27%) | 29% (15–47%) | 0.072 | 12% (3–27%) | 21% (9–38%) | 0.323 |
NPV (95% CI) | 82% (76–86%) | 88% (84–92%) | 0.042 | 88% (82–92%) | 92% (88–95%) | 0.134 | 95% (91–97%) | 99% (96–100%) | 0.021 |