| Length of ICU stay | |||||||||
| trial name | mean 1 | SD 1 | total 1 | mean 2 | SD 2 | total 2 | difcal | catcal | typepatient |
| Ahrens 2005 | 16.75 | 10.35 | 8 | 23 | 15.2 | 10 | 10.4 | 0 | 1 |
| Arabi 2011 | 11.7 | 8.1 | 120 | 14.5 | 15.5 | 120 | 2.55 | 1 | 0 |
| Arabi 2015 | 15.8 | 11.6 | 448 | 16.4 | 12.1 | 446 | 5.48 | 1 | 0 |
| Battistella 1997 | 18 | 12 | 27 | 29 | 22 | 30 | 7 | 0 | 1 |
| Charles 2014 | 16.7 | 2.7 | 41 | 13.5 | 1.1 | 42 | 5 | 1 | 0 |
| Ibrahim 2002 | 9.8 | 7.4 | 75 | 13.6 | 14.2 | 75 | 4.28 | 2 | 0 |
| NHLBI 2012 | 11.5 | 11 | 508 | 11 | 9.8 | 492 | 11.05 | 2 | 0 |
| Petros 2016 | 22.4 | 25.5 | 46 | 17 | 16.1 | 54 | 8.4 | 1 | 0 |
| Rice 2011 | 8.1 | 6.1 | 98 | 7,6 | 5.9 | 102 | 13.71 | 2 | 0 |
| Rugeles 2013 | 9.5 | 5.5 | 40 | 10.4 | 5 | 40 | 2 | 1 | 0 |
| Rugeles 2016 | 13.23 | 6.03 | 60 | 13.45 | 8.33 | 60 | 7.9 | 1 | 0 |
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