| First Author | Year | Population (Number of Enrollees) | Length of ICU Stay | Mean LOSa (Range) | ICU Mortality | Hospital Mortality | Long-Term Mortality | Location |
| Venker [13] | 2005 | General ICU (78) | >60 days | 86 | 38% | 49% | 1 year: 56% 5 years: 67% | Netherlands |
| Present Study | 2014 | Surgical ICU (64) | ≥30 days | 47 (30 - 125) | 47% | 1 year: 72% 3 years: 78% | United States | |
| Karth [14] | 2006 | Mixed cardiologic ICU (135) | ≥30 days | 39 | 21% | 34% | 1 year: 55% 2 years: 63% 4 years: 74% | Austria |
| Friedrich [15] | 2005 | Medical/surgical ICU (182) | ≥30 days | 49 | 32% | 42% | 6 months: 50% | Canada |
| Hughes [16] | 2001 | General ICU (323) | ≥30 days | 43 | 27% | 40% | Scotland | |
| Montuclard [17] | 2000 | General ICU, >70 years old (75) | ≥30 days | 53 (31 - 139) | 33% | 53% | 1 year: 59% 2 years: 63% | France |
| Gracey [18] | 1992 | Mechanical ventilation | >29 days | 40% | 1 year: 61% 2 years: 65% 3 years: 67% | United States | ||
| Hartl [3] | 2007 | Surgical ICU (390) | ≥28 days | 63 | 46% | 1 year: 67% 2 years: 76% 5 years: 80% | Germany | |
| Soares [19] | 2008 | General ICU, cancer or remission <5 years (163) | ≥21 days | 26% | 82% | 6 months: 98% | Brazil | |
| Martin [20] | 2005 | Teaching hospital (TH) ICU (115) Community hospital (CH) ICU (126) | TH: ≥21 days CH: ≥10 days | TH: 46 CH: 21 | TH: 27% CH: 20% | TH: 37% CH: 31% | Canada | |
| Weiler [10] | 2012 | Surgical ICU (67) | ≥20 days | 43% | 1 year: 61.2% | Germany | ||
| Fakhry [21] | 1996 | Surgical ICU (83) | >14 days | 26 (14 - 81) | 25% | 37% | United States | |
| Laupland [22] | 2005 | General ICU (216) | ≥14 days | 25% | 40% | 1 year: 44% | Canada | |
| Rimachi [23] | 2007 | Medical/surgical ICU (189) | >10 days | 17 (11 - 70) | 35% | 44% | 1 year: 63% | Belgium |
| Gaundino [24] | 2007 | ICU, post cardiac surgery (121) | ≥10 days | 53% | 6 years: ~80% | Italy | ||
| Lipsett [25] | 2000 | Surgical ICU (128) | ≥7 days | 11 (7 - 77) | 40% | 41% | 1 year: 54% | United States |
| Madoff [26] | 1985 | Surgical ICU (63) | ≥7 days | 21 (7 - 152) | 41% | United States |