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Levels of IL-6, PCT, and corresponding positivity according to the reference ranges among groups.
| Groups | n | IL-6 (pg/mL) | IL-6 (+/−) | PCT (ng/mL) | PCT (+/−) |
| Common group | 56 | 23.93 ± 9.64 | 46 (82.1%) | 0.23 ± 0.13 | 6 (10.7%) |
| Severe group | 28 | 69.22 ± 22.98∗ | 25 (89.3%) | 0.38 ± 0.16∗ | 7 (25.0%) |
| Critical group | 16 | 160.34 ± 26.15# | 16 (100%) | 0.73 ± 0.36# | 10 (62.5%) |
| P | <.001 | <.001 |
