Table 2—

Association of initial investigations with mortality on univariate analysis

VariableNo. with complete dataCasesControlsOR95% CI
White cell count, ×109·L−1152
 ≤8.201721Reference
 8.21–11.9014240.750.30–1.89
 11.91–15.7019191.100.44–2.76
 ≥15.7124142.470.96–6.34
Urea, mmol·L−1152
 ≤7.131424Reference
 7.14–9.617231.270.51–3.15
 9.7–13.817201.370.54–3.48
 ≥13.926114.211.61–11.01
Creatinine, µmol·L−1152
 ≤891425Reference
 89.1–112.517201.520.61–3.81
 112.6–151.522162.460.98–6.15
 ≥151.621172.210.88–5.51
Albumin, g·L−1119
 ≥35.1817Reference
 32.1–3514151.980.65–6.03
 28.1–32.021133.431.16–10.19
 ≤28.016152.270.76–6.78
CXR, bilateral involvement1551243.421.05–11.11
CXR, pleural effusion1569110.001.24–80.62
  • CXR: chest radiograph; OR: odds ratio; CI: confidence interval.