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Table 2 Summarised study characteristics

From: The impact of selection criteria and study design on reported survival outcomes in extracorporeal oxygenation cardiopulmonary resuscitation (ECPR): a systematic review and meta-analysis

  Number of studies that reported characteristics (%) Prospective median (95% CI) Retrospective median (95% CI) Overall median (95% CI)
Demographics
Age* 63/67 (94%) 52 (48–55) 56 (55–58) 56 (54–58)
Male gender (%) 64/67 (95%) 80 (75–84) 74 (71–77) 75 (72–78)
Ischemic heart disease (%) 53/67 (79%) 51 (41–60) 53 (46–61) 53 (46–59)
Smoking (%) 24/67 (36%) 28 (21–38) 28 (25–33) 29 (25–33)
Diabetes (%) 47/67 (70%) 41 (14–75) 25 (21–30) 27 (21–34)
Arrest
Witnessed arrest *(%) 51/67 (76%) 100 (95–100) 100 (37–100) 100 (96–100)
*Cardiac cause (%) 51/67 (76%) 85 (75–92) 90 (83–94) 89 (83–93)
Non-cardiac cause (%) 44/67 (65%) 17 (9–29) 13 (9–19) 14 (10–19)
Bystander CPR *(%) 40/67 (60%) 95 (68–99) 75 (57–87) 80 (66–90)
Shockable rhythm* (%) 56/67 (84%) 70 (51–84) 47 (39–56) 52 (45–60)
Non-shockable rhythm (%) 45/67 (67%) 41 (31–52) 56 (43–69) 52 (41–63)
Time to ECMO (min) 55/67 (82%) 74 (55–94) 57 (53–61) 60 (56–64)
  1. Results are aggregated using random-effects meta-analysis of proportions or means, as appropriate. Data is presented with 95% confidence interval of the pooled values in brackets. CPR, cardiopulmonary resuscitation; ECMO, extracorporeal membrane oxygenation; IHD, ischemic heart disease
  2. * Represent inclusion criteria commonly used for ECMO CPR