Table 2.
Total numbers and relative risk (mortality rate ratio) of 30-day and 90-day mortality of 222 chronic obstructive pulmonary disease patients treated with invasive mechanical ventilation at Silkeborg Hospital, Denmark, 1994–2004
| Mortality (n) | Mortality (%) | Crude risk MRR (95% CI) | Adjusted risk MRR (95% CI)* | |
|---|---|---|---|---|
| 30 days | ||||
| Hb <7.4 mmol/L (12.0 g/dL) | 23 | 54.8 | 3.5 (1.8–6.6) | 3.1 (1.6–5.9) |
| Hb 7.4–9.3 mmol/L (12–15 g/dL) | 27 | 20.5 | 1 (Ref.) | 1 (Ref.) |
| Hb >9.3 mmol/L (15.0 g/dL) | 8 | 16.7 | 0.9 (0.4–2.1) | 1.0 (0.4–2.4) |
| 90 days | ||||
| Hb <7.4 mmol/L (12.0 g/dL) | 24 | 57.1 | 3.0 (1.8–5.2) | 2.6 (1.5–4.5) |
| Hb 7.4–9.3 mmol/L (12–15 g/dL) | 33 | 25.0 | 1 (Ref.) | 1 (Ref.) |
| Hb >9.3 mmol/L (15.0 g/dL) | 11 | 22.9 | 0.9 (0.4–1.8) | 1.1 (0.5–2.1) |
*
Note: Adjusted by Cox-proportional hazards regression analysis for gender, age, comorbidity, and pH at intensive care unit admission.
Abbreviations: Hb, hemoglobin; MRR, mortality rate ratios.