| n a | % Mechanically ventilatedb | % Not mechanically ventilatedb | OR (95% CI) |
---|---|---|---|---|
Age (years) | Â | Â | Â | Â |
   0–19 | 237 | 40.5 | 59.5 | 1.28 (1.22–1.34) per 10 year increase |
   20–29 | 365 | 43.3 | 56.7 |  |
   30–39 | 367 | 47.1 | 52.9 |  |
   40–49 | 354 | 62.1 | 37.9 |  |
   50–59 | 340 | 65.6 | 34.4 |  |
   60+ | 489 | 72.2 | 27.8 |  |
Steroid treatment in previous 6 months | Â | Â | Â | Â |
   No | 1849 | 57.0 | 43.0 | 1.00 |
   Yes | 303 | 56.1 | 43.9 | 0.97 (0.76–1.23) |
CPR within 24 hours before admission | Â | Â | Â | Â |
   No | 1966 | 54.1 | 45.9 | 1.00 |
   Yes | 171 | 88.9 | 11.1 | 6.78 (4.18–11.02) |
Neurological insult in first 24 hours | Â | Â | Â | Â |
   No | 1,930 | 52.6 | 47.4 | 1.00 |
   Yes | 222 | 93.7 | 6.3 | 13.39 (7.74–23.18) |
Highest heart rate (beats/min) | Â | Â | Â | Â |
   <124 | 697 | 55.2 | 44.8 | 1.04 (1.00–1.08) per 10 beats/min increase |
   124–141 | 739 | 58.1 | 41.9 |  |
   ≥141 | 672 | 59.4 | 40.6 |  |
Lowest PaO2 (kPa) | Â | Â | Â | Â |
   <9.8 | 615 | 66.0 | 34.0 | 0.83 (0.76–0.91) per 5 kPa increase |
   9.8–12.4 | 652 | 66.6 | 33.4 |  |
   ≥12.4 | 652 | 55.5 | 44.5 |  |
pH from ABG with lowest PaO2 | Â | Â | Â | Â |
   <7.32 | 591 | 84.8 | 15.2 | 0.99 (0.99–1.00) per pH 0.1 increase |
   7.32–7.41 | 686 | 58.5 | 41.5 |  |
   ≥7.41 | 640 | 46.7 | 53.3 |  |
PaCO2 from ABG with lowest pH (kPa) | Â | Â | Â | Â |
   <5.7 | 607 | 34.8 | 65.2 | 6.61 (5.21–8.40) per 5 kPa increase |
   5.7–8.2 | 597 | 65.0 | 35.0 |  |
   ≥8.2 | 619 | 88.2 | 11.8 |  |
Acute Physiology Score | Â | Â | Â | Â |
   0–8 | 682 | 41.4 | 58.6 | 1.18 (1.16–1.21) per 1 point increase |
   9–12 | 620 | 60.3 | 39.7 |  |
   13+ | 602 | 80.6 | 19.4 |  |
APACHE II score | Â | Â | Â | Â |
   0–10 | 621 | 39.8 | 60.2 | 1.15 (1.13–1.17) per 1 point increase |
   11–15 | 626 | 58.8 | 41.2 |  |
   16+ | 657 | 80.1 | 19.9 |  |