Table 1—

Association of clinical features with mortality on univariate analysis

VariableNo. with complete dataCasesControlsOR95% CI
Age yrs156
 ≤802221Reference
 81–8316190.770.31–1.88
 84–8825211.180.49–2.82
 ≥8915170.740.31–1.77
Nursing/residential home 1562.030.96–4.31
 residence2414
No comorbid illness15620210.940.46–1.91
Urinary incontinence156741.820.51–6.50
Mental Confusion15637232.161.12–4.17
Temperature, °C155
 ≥37.91229Reference
 37.1–37.814181.840.70–4.9
 36.3–37.022183.001.17–7.66
 ≤36.230126.132.32–16.17
Pulse, beats·min−1156
 ≤801728Reference
 81–9413201.070.43–2.69
 95–11030172.911.25–6.78
 ≥11118132.280.90–5.80
Systolic blood pressure, mmHg156
 ≥1502019Reference
 131–14918171.000.40–2.51
 121–13016160.950.37–2.42
 ≤12024260.880.38–2.03
Diastolic blood pressure, mmHg156
 ≥811515Reference
 71–8019240.790.31–2.02
 61–7022211.050.41–2.66
 ≤6022181.220.47–3.16
Respiratory rate, min−1137
 ≤201732Reference
 21–2412121.940.71–5.28
 25–3021113.701.44–9.53
 ≥3119152.451.00–6.08
Oxygen saturation, %99
 ≥96732Reference
 93–956120.540.15–2.00
 89–9214111.600.49–5.22
 ≤8816152.740.81–9.31
  • OR: odds ratio; CI: confidence interval.