Table 3.
Univariable analysis of risk factors for in‐hospital death
| Risk factor | Survivors (n=117) | Deaths (n=9) | P‐valuea | Odds ratio (95% confidence interval)a |
|---|---|---|---|---|
| Early influenza diagnosis, n (%) | 50 (42.7) | 3 (33.3) | .73 | 1.50 (0.36‐6.26) |
| Community‐acquired influenza infection, n (%) | 91 (77.8) | 6 (66.7) | .43 | 1.75 (0.41‐7.48) |
| ICU admission, n (%) | 34 (29.1) | 7 (77.8) | .005 | 8.54 (1.69‐43.23) |
| Mechanical ventilation, n (%) | 16 (13.7) | 6 (66.7) | .001 | 12.63 (2.87‐55.62) |
| Charlson comorbidity index, median (range) | 4 (0‐12) | 6 (3‐12) | .020 | 1.32 (1.05‐1.66) |
| CURB‐65 score, median (range) | 1 (0‐4) | 1 (0‐5) | .047 | 1.94 (1.16‐3.23) |
| Pneumonia severity index, median (range) | 88 (9‐175) | 123 (71‐222) | .017 | 1.93 (1.01‐1.05) |
| C‐reactive protein | ||||
| Admission, mg/L, median (range) | 52 (2.6‐440) | 113.5 (0.3‐536) | .019 | 1.01 (1.00‐1.01) |
| Maximum, mg/L, median (range) | 109 (4.1‐484) | 250 (27‐536) | .015 | 1.01 (1.00‐1.01) |
| Maximum total neutrophil count, G/L, median (range) | 6.9 (0.18‐62.11) | 19 (2.78‐37.14) | .036 | 1.07 (1.02‐1.13) |
| Diastolic blood pressure on admission or first symptom, mm Hg, median (range) | 73 (35‐120) | 54 (39‐67) | <.001 | 0.91 (0.86‐0.96) |
According to Fisher exact tests or Wilcoxon rank sum tests, as appropriate.
a
Per unit increase (for continuous variables in univariable logistic regression analysis).
ICU, intensive care unit.