Table 5.
Effects of lower versus higher hemoglobin levels on length of stay
| Study | Time frame | Measure | Lower Hb | Higher Hb | P value | Mean difference (95% CI) |
|---|---|---|---|---|---|---|
| McIntyre et al. 2006 | ICU | Median (IQ range) | 10 (5-21) | 8 (5-11) | 0.26 | Not estimable |
| Hospital | 27 (14-39) | 30.5 (17-47) | 0.72 | |||
| Lacroix et al. 2007 | ICU | Mean (± SD) | 8.0 ± 5.2 | 9.9 ± 7.0 | 0.37 | -1.9 [-4.9, 1.1] |
| George et al. 2008 | ICU | Mean (± SD) | 11.0 ± 8.6 | 16.7 ± 12.2 | 0.02 | -5.7 [-10.3, -1.1] |
| Hospital | 13.0 ± 9.9 | 17.7 ± 11.7 | 0.09 | -4.7 [-9.4, 0.02] | ||
| Warner et al. 2010 | Hospital | Mean (± SD) | 11.7 ± 7.4 | 23.1 ± 17.8 | < 0.0005 | -11.4 [-16.1, -6.7] |
CI, confidence interval; Hb, hemoglobin concentration; ICU, intensive care unit; IQ, interquartile; SD, standard deviation.