|
Effect estimates from the model of length of stay in the CMP unit (n = 1225) |
||
| Variable |
Multiplicative effect on LOS (95% CI) |
P |
|
|
||
| Type of condition* |
||
| Haemorrhage |
1.00 |
<0.001 |
| Hypertensive |
1.44 (1.29–1.61) |
|
| Age (per 10-year increase) |
1.06 (0.98–1.14) |
0.165 |
| Surgical status* |
||
| Surgical (admission from theatre) |
1.00 |
0.036 |
| Nonsurgical |
1.12 (1.01–1.24) |
|
| Past medical history presenta |
1.04 (0.65–1.64) |
0.883 |
| Highest temperature (per 1°C increase)* |
1.13 (1.06–1.20) |
<0.001 |
| SBP (per 10 mmHg deviation from normal)* |
1.09 (1.05–1.13) |
<0.001 |
| Highest heart rate (per 10 beats/min increase)* |
1.09 (1.06–1.12) |
<0.001 |
| Highest respiratory rate (per 10 breaths/min) increase |
0.98 (0.91–1.06) |
0.664 |
| PaO2/FiO2 ratio (per 100 mmHg decrease)* |
1.14 (1.09–1.19) |
<0.001 |
| Lowest pH (per 0.1 decrease)* |
1.14 (1.06–1.23) |
<0.001 |
| Lowest sodium (per 5 mmol/l decrease)* |
0.90 (0.84–0.97) |
0.006 |
| Potassium (per 1 mmol/l deviation from normal) |
1.12 (0.94–1.33) |
0.190 |
| Highest creatinine (per 100 μmol/l increase)* |
1.32 (1.20–1.45) |
<0.001 |
| Highest urea (per 5 mmol/l increase) |
1.02 (0.94–1.11) |
0.662 |
| Lowest WBC (per 5 × 109/l decrease)* |
1.12 (1.06–1.17) |
<0.001 |
| Lowest platelet count (per 50 × 109/l decrease) |
1.01 (0.97–1.05) |
0.563 |
| GCS (per 1 point decrease) |
1.01 (0.99–1.03) |
0.370 |
|
aEvidence of any of a pre-specified list of severe conditions in the past medical history as defined in Acute Physiology and Chronic Health Evaluation (APACHE) II. CI, confidence interval; CPM, Case Mix Programme; GCS, Glasgow Coma Scale; LOS, length of stay; PaO2/FiO2, arterial oxygen tension; fractional inspired oxygen; SBP, systolic blood pressure; WBC, white blood count. *P < 0.05. | ||
Harrison et al. Critical Care 2005 9(Suppl 3):S25 doi:10.1186/cc3542 |
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