Table 3.
Subgroup analysis results.
| Subgroup analysis | Number of studies | Sensitivity (95% CI) | I 2 | Specificity (95% CI) | I 2 |
|---|---|---|---|---|---|
| Group A | |||||
| Nasal swab | 6 | 0.88 (0.85-0.91) | 90.5% | 0.97 (0.95-0.98) | 15.8% |
| Nasopharyngeal aspirates | 3 | 0.93 (0.88-0.96) | 90.6% | 0.88 (0.84-0.91) | 91.7% |
| Nasopharyngeal swab | 7 | 0.82 (0.78-0.85) | 83.0% | 1.00 (0.99-1.00) | 42.1% |
| Oropharyngeal swab | 2 | 0.62 (0.54-0.70) | 0.0% | 1.00 (0.99-1.00) | 61.8% |
|
| |||||
| Group B | |||||
| Culture | 2 | 0.75 (0.65-0.83) | 10.9% | 0.91 (0.88-0.93) | 97.5% |
| PCR | 20 | 0.85 (0.83-0.86) | 92.2% | 0.99 (0.98-0.99) | 83.6% |
| Culture+PCR | 2 | 0.88 (0.74-0.96) | 88.2% | 0.98 (0.96-0.99) | 58.7% |
CI: confidence interval.