Table 4.
Effects of lower versus higher hemoglobin levels on mortality
| No. of events/No. of participants | ||||
|---|---|---|---|---|
| Study | Time frame | Lower Hb | Higher Hb | Odds ratio (95% CI) |
| McIntyre et al. 2006 | 30 days | 5/29 | 5/38 | 1.38 [0.36, 5.29] |
| Flückiger et al. 2010 | In-hospital | 17/37 | 34/102 | 1.70 [0.79, 3.66] |
| Lacroix et al. 2007 | 28 days | 2/30 | 1/36 | 2.50 [0.22, 29.01] |
| George et al. 2008 | In-hospital | 11/39 | 15/43 | 0.73 [0.29, 1.87] |
| Warner et al. 2010 | 6 months | 6/63 | 13/76 | 0.51 [0.18, 1.43] |
CI, confidence interval; Hb, hemoglobin concentration.