Univariate analysis of factors associated with mortality and independence from mechanical ventilation
| Mortality | Ventilator independence | |||
|---|---|---|---|---|
| OR (95% CI) | p value | OR (95% CI) | p value | |
| ICU, intensive care unit; LFU, Lane Fox Respiratory Unit; COPD, chronic obstructive pulmonary disease. | ||||
| Odds ratios (ORs) for continuous variables represent increased risk associated with 1 unit increase in the variable. | ||||
| Odds ratios (ORs) for diagnostic categories are referenced against those without the condition. | ||||
| p value for diagnostic categories is for heterogeneity across groups. | ||||
| Age (years) | 1.06 (1.03 to 1.1) | <0.001 | 0.99 (0.97 to 1.01) | 0.38 |
| Female sex | 1.01 (0.49 to 2.05) | 0.99 | 2.13 (1.09 to 4.17) | 0.03 |
| Referral from “in house” ICU | 0.99 (0.54 to 2.31) | 0.760 | 5.10 (2.32 to 11.24) | <0.001 |
| Length of stay in ICU (days) | 1.02 (1.01 to 1.03) | 0.001 | 0.99 (0.98 to 1.00) | 0.07 |
| Length of stay in LFU (days) | 1.00 (0.99 to 1.01) | 0.55 | 0.99 (0.99 to 1.00) | 0.15 |
| APACHE II score | 1.07 (0.98 to 1.16) | 0.11 | 0.99 (0.91 to 1.07) | 0.73 |
| APACHE II risk of death (%) | 1.02 (1.0 to 1.05) | 0.05 | 0.99 (0.96 to 1.01) | 0.34 |
| Underlying diagnosis | ||||
| Neuromuscular/chest wall | 0.36 (0.14 to 0.87) | 0.007 | 0.28 (0.12 to 0.63) | 0.015 |
| COPD | 1.24 (0.35 to 1.84) | 2.81 (1.35 to 5.86) | ||
| Surgical | 4.04 (1.79 to 9.10) | 1.29 (0.57 to 2.90) | ||