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Table 3 Outcomes of the patients enrolled

From: Comparison of extracorporeal membrane oxygenation outcome for influenza-associated acute respiratory failure in Japan between 2009 and 2016

Year 2009 2016 p value
Ventilator days before ECMO (days) 5.0 (1.0–7.0) 1.0 (1.0–2.8) 0.11
Total ventilator days (days) 19 (9–25) 27 (14–38) 0.24
Ventilator-free days (days) 1.5 (0–10.5) 7.5 (4–27) 0.12
Length of ECMO therapy (days) 8.5 (4.5–10.0) 10.0 (8.3–32.5) 0.08
Number of circuits used 2.0 (1.3–3.0) 1.0 (1.0–2.0) 0.14
Duration of each circuit (days) 4.0 (3.3–4.9) 8.5 (6.5–14.9) 0.0001
Number of patients (per institute) 1.0 (1.0–1.0) 1.0 (1.0–1.8) 0.42
Length of ICU stay (days) 17 (9–26) 29 (20–41) 0.038
Length of ICU stay in survived patients (days) 24 (17–26) 24 (20–38) 0.57
Length of hospital stay (days) 25 (12–53) 41 (27–65) 0.14
Length of hospital stay in survived patients (days) 69 (40–77) 42 (23–70) 0.38
Days alive (days) 25 (14–46) 43 (37–73) 0.073
Overall survival rate 5 (36) 11 (79) 0.054
In-hospital survival rate 5 (36) 11 (79) 0.054
60-day survival rate 5 (36) 12 (86) 0.018
  1. Data are expressed as median (interquartile) or number (%)
  2. ECMO extracorporeal membrane oxygenation, ICU intensive care unit, NA not available