Day 1 | ||||
Characteristics | Total participants (N = 55) | Influenza A induced ARDS (N = 23) | COVID-19-induced ARDS (N = 32) | p-value |
Pco2 | 38.0 (35.1–43.6) | 37.1 (34.4–40.5) | 40.3 (36.8–44.3) | 0.096 |
PaO2:FiO2 | 194.4 (149.4–268.3) | 268.0 (196.4–304.3) | 162.5 (139.4–208.3) | < 0.001 |
Mve (L/min) | 8.7 (7.2–10.3) | 7.8 (6.1–8.5) | 9.4 (8.0–10.4) | 0.005 |
TV/PBW (ml/kg) | 7.2 (6.6–7.8) | 7.0 (6.6–8.0) | 7.2 (6.4–7.8) | 0.824 |
PIP (cm H2O) | 22.0 (19.0–25.0) | 22.0 (19.0–25.0) | 22.0 (19.0–25.0) | 0.537 |
PEEP (cm H2O) | 8.0 (7.0–10.0) | 7.0 (5.0–8.0) | 10.0 (8.0–11.8) | < 0.001 |
Cdyn (cm H2O) a | 33.4 (25.6–40.0) | 27.0 (23.5–36.8) | 35.7 (28.7–42.9) | 0.056 |
DP (cm H2O) b | 14.0 (11.0–16.0) | 14.0 (12.0–17.0) | 12.5 (9.3–15.8) | 0.072 |
Day 3 | ||||
Characteristics | Total participants (N = 53) | Influenza A induced ARDS (N = 22) | COVID-19-induced ARDS (N = 31) | p-value |
Pco2 | 38.9 (33.7–42.6) | 36.4 (32.3–41.8) | 40.0 (35.1–42.6) | 0.136 |
PaO2:FiO2 | 269.3 (171.3–333.0) | 308.9 (276.9–379.1) | 185.0 (157.0–275.6) | < 0.001 |
Mve (L/min) | 8.3 (7.2–9.8) | 7.2 (5.5–9.2) | 8.7 (7.7–9.9) | 0.012 |
TV/PBW (ml/kg) | 7.3 (6.5–7.8) | 7.4 (6.3–8.0) | 7.3 (6.5–7.8) | 0.691 |
PIP (cm H2O) | 21.0 (17.5–24.5) | 18.5 (14.5–22.0) | 23.0 (20.0–25.0) | 0.001 |
PEEP (cm H2O) | 8.0 (6.0–10.0) | 6.0 (5.0–8.0) | 10.0 (8.0–10.0) | < 0.001 |
Cdyn (cm H2O) a | 30.2 (25.0–41.6) | 32.9 (27.3–56.1) | 28.6 (22.7–38.9) | 0.108 |
DP (cm H2O) b | 13.0 (10.5–16.0) | 11.0 (8.0–15.3) | 13.1 (12.0–17.0) | 0.044 |
Day 7 | ||||
Characteristics | Total participants (N = 42) | Influenza A induced ARDS (N = 14) | COVID-19-induced ARDS (N = 28) | p-value |
Pco2 | 36.7 (33.5–41.6) | 35.5 (29.1–39.1) | 37.3 (34.0–42.2) | 0.196 |
P/F ratio | 260.3 (182.2–336.9) | 314.6 (267.9–366.8) | 212.9 (174.2–283.9) | 0.014 |
Mve (L/min) | 8.6 (6.9–10.7) | 6.7 (5.7–8.8) | 9.3 (8.3–11.1) | 0.001 |
TV/PBW (ml/kg) | 7.6 (6.6–8.6) | 7.5 (6.0–9.1) | 7.6 (6.8–8.6) | 0.626 |
PIP (cm H2O) | 20.0 (14.8–24.0) | 16.5 (12.8–20.0) | 21.5 (17.3–24.8) | 0.007 |
PEEP (cm H2O) | 8.0 (5.0–8.3) | 6.0 (5.0–7.0) | 8.0 (7.0–10.0) | 0.005 |
Cdyn (cm H2O) a | 32.1 (27.3–55.3) | 35.0 (28.0–81.6) | 31.5 (26.1–38.6) | 0.348 |
DP (cm H2O) b | 13.0 (8.0–16.0) | 10.0 (7.0–13.3) | 15.0 (10.3–16.0) | 0.048 |