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. 2021 Apr 20;223(2):388–394. doi: 10.1016/j.amjsurg.2021.04.004

Table 1.

A comparison of patient factors between those who were placed on VV ECMO for ARDS secondary to COVID-19 infection versus those with ARDS secondary to confirmed influenza infection.

Patients with COVID-19 (n = 32) Patients with Influenza (n = 28) p value
Patient Factors
Age (years)
Mean (SD) 47.8 (10.3) 41.2 (12.8) 0.033
Sex: n (%)
Male 25 (78.1) 16 (57.1) 0.08
Female 7 (21.9) 12 (42.9)
BMI
Mean (SD) 35.1 (7.8) 37.1 (10.1) 0.4
Race: n (%)
Latino 17 (53.1) 2 (7.1) <0.001
African-American 6 (18.8) 5 (17.9)
Caucasian 9 (28.1) 18 (64.3)
Other 0 (0.0) 3 (10.7)
Diabetic?
Yes: n (%) 16 (50.0) 3 (10.7) 0.001
Charleson Comorbidity Index:
Median (IQR) 1 (0–2) 0 (0–1.5) 0.4
Clinical Status
Number of Days from Symptom Onset to Cannulation
Mean (SD) 16.2 (8.3) 8.5 (4.4) <0.001
Use of Non-invasive Positive-Pressure (NIPPV) Ventilation Prior to Cannulation
Yes: n (%) 25 (78.1) 14 (50.0) 0.023
Mean Days on Non-Invasive Ventilation: Mean (SD) 3.3 (4.1) 0.78 (1.8) 0.004
Proned Prior to Cannulation?
Yes: n (%) 26 (81.3) 1 (3.6) <0.001
Number of Days from ICU Admission to Cannulation
Mean (SD) 8.7 (7.2) 1.8 (2.2) <0.001
Number of Days of Intubation Prior to Cannulation
Mean Days (SD) 4.5 (4.3) 1.5 (1.7) <0.001
P:F Ratio at Cannulation
Mean (SD) 69.3 (19.9) 58.5 (33.8) 0.1
Murray Score at Cannulation
Score 0 0 (0.0) 0 (0.0) 1.0
Score 0.1–2.5 0 (0.0) 0 (0.0)
Score > 2.5 32 (100.0) 32 (100.0)
Labs at Cannulation:
Mean (SD)
Serum pH 7.31 (0.11) 7.23 (0.12) 0.006
Fibrinogen 695 (249) 419 (207) <0.001
D-dimer 3628 (5277) 3503 (5287) 0.9