Study | Study setting | Years | Inclusion criteria | Number of patients | Intervention group | Control group | Primary outcome | Intervention group | Control group | ||
---|---|---|---|---|---|---|---|---|---|---|---|
Deaths/total | Unfavourable neurological outcome/total | Deaths/total | Unfavourable neurological outcome/total | ||||||||
Bernard [42] | Single centre in Melbourne, Australia | 1996–1999 | OHCA, initial rhythm VF, age > 18 (men) and > 50 (women) |  | TTM at 33 °C for 18 h | No TTM, unclear about fever treatment | Proportion of CPC 1–2 at hospital discharge | 22/43 | 22/43 | 23/34 | 25/34 |
HACA [37] | Multiple centres in Europe | 1996–2001 | OHCA and some IHCA, shockable rhythm, witnessed, age 18–75 | 275 | TTM at 32–34 °C, for 24 h | No TTM, unclear about fever treatment | Proportion of CPC 1–2 at six months | 56/137 | 61/136 | 76/138 | 83/137 |
Laurent [38] | Single centre in Paris, France | 2000–2002 | OHCA only, all rhythms, age 18–75 | 42 | TTM at 32–33 °C for 16 h | No TTM, unclear about fever treatment | Survival until six months | 15/22 | 15/22 | 11/20 | 11/20 |
Hachimi-Idrissi [39] | Single centre in Belgium | 1999–2002 | OHCA only, non-shockable rhythm, age > 18 years | 28 | TTM at 33 °C for 24 h | No TTM, unclear about fever treatment | Level of s100b | 6/14 | 8/ 14 | 8/14 | 11/14 |
Nielsen [40] | Multiple centres in Europe and Australia | 2010–2103 | OHCA, all rhythms, age > 18 | 950 | TTM at 33 °C for28h | TTM at 36 °C for 28 h | All-cause mortality until six months | 226/473 | 251/469 | 220/466 | 242/464 |
Lascarrou [41] | Multiple centres in France | 2014–2018 | OHCA or IHCA, non-shockable rhythm, age > 18 | 584 | TTM at 33 °C for 24 h | TTM at 36.5–37.5 °C | Proportion of CPC 1–2 at 90 days | 231/284 | 255/284 | 247/297 | 280/297 |
Dankiewicz [17] | Multiple centres in Europe, Australia, New Zealand and USA | 2017–2020 | OHCA, all rhythms, age > 18 | 1900 | TTM at 33 °C for 24 h | TTM, if > 37.8 °C then 37.5 °C | All-cause mortality until six months | 465/925 | 488/881 | 446/925 | 479/866 |