| Adjusted odds ratio | 95% confidence interval | Pvalue |
---|---|---|---|
Sex | Â | Â | Â |
   Male versus female | 1.00 | 0.87 to 1.16 | 0.95 |
Age | See Figure 1 | < 0.001 | Â |
Quintiles of IMD | Â | Â | Â |
   1 (least deprived) | 1 | - | 0.95 |
   2 | 0.97 | 0.75 to 1.26 |  |
   3 | 0.99 | 0.77 to 1.28 |  |
   4 | 1.06 | 0.83 to 1.35 |  |
   5 (most deprived) | 0.98 | 0.77 to 1.25 |  |
Past medical history of one or more specified serious conditionsa | Â | Â | Â |
   Yes versus no | 0.96 | 0.79 to 1.17 | 0.70 |
Admission type | Â | Â | Â |
   Unplanned local admission | 1 | - | < 0.001 |
   Planned local medical admission | 0.89 | 0.42 to 1.90 |  |
   Planned local surgical admission | 0.33 | 0.16 to 0.68 |  |
   Unplanned transfer in | 1.16 | 0.82 to 1.64 |  |
   Planned transfer in | 1.84 | 1.31 to 2.59 |  |
   Repatriation | 0.36 | 0.13 to 0.96 |  |
Surgical status | Â | Â | Â |
   Nonsurgical | 1 | - | < 0.001 |
   Emergency/urgent | 0.49 | 0.38 to 0.64 |  |
   Elective/scheduled | 0.23 | 0.12 to 0.42 |  |
Reason for admission by body system | Â | Â | Â |
   Cardiovascular | 1 | - | < 0.001 |
   Respiratory | 1.00 | 0.80 to 1.25 |  |
   Neurological | 1.51 | 1.17 to 1.94 |  |
   Gastrointestinal | 0.81 | 0.61 to 1.06 |  |
   Genitourinary including renal | 0.63 | 0.45 to 0.87 |  |
   Haematological/immunological | 0.68 | 0.36 to 1.31 |  |
   Endocrine, metabolic, thermoregulation and poisoning | 0.66 | 0.46 to 0.91 |  |
   Musculoskeletal | 0.98 | 0.59 to 1.65 |  |
   Dermatological | 1.12 | 0.57 to 2.22 |  |
ICNARC Physiology Score | See Figure 2 | < 0.001 | Â |
Month of admission to critical care | Â | Â | Â |
   January | 1 | - | 0.003 |
   February | 0.70 | 0.51 to 0.95 |  |
   March | 0.80 | 0.59 to 1.06 |  |
   April | 0.71 | 0.53 to 0.97 |  |
   May | 0.68 | 0.50 to 0.92 |  |
   June | 0.55 | 0.40 to 0.77 |  |
   July | 0.50 | 0.35 to 0.72 |  |
   August | 0.73 | 0.53 to 1.00 |  |
   September | 0.54 | 0.38 to 0.77 |  |
   October | 0.61 | 0.44 to 0.86 |  |
   November | 0.61 | 0.43 to 0.85 |  |
   December | 0.80 | 0.59 to 1.08 |  |
Time of admission to critical care | Â | Â | Â |
   07:00 to 18:59 | 1 | - | 0.24 |
   19:00 to 23:59 | 0.86 | 0.72 to 1.03 |  |
   00:00 to 06:59 | 0.93 | 0.78 to 1.11 |  |
Number of beds in referring critical care unit | 0.96 | 0.94 to 0.98 | < 0.001 |