Advanced Age as a Predictor of Survival and Weaning in Venoarterial Extracorporeal Oxygenation: A Retrospective Observational Study
Table 2
Mean, standard error, and 95% CI of survival days and ECMO weaning hours according to the age. Cumulative survival rates at 6, 10, and 30 days after ECMO initiation according to the age and cumulative ECMO weaning rates at 48, 72, and 192 hours after ECMO initiation according to the age subgroups.
Age < 50
50 ≤ age < 60
60 ≤ Age < 70
Age ≥ 70
Overall
Mean survival days
48.2
22.0
26.7
15.9
38.1
SE of survival days
7.9
6.1
7.0
4.0
5.5
95% CI of survival days
7.00–37.00
4.00–15.00
4.00–11.00
4.00–9.00
5.00–10.00
Cumulative survival rates in 6 days
SP
0.677
0.519
0.516
0.370
0.504
SE
0.084
0.096
0.089
0.071
0.043
Cumulative survival rates in 10 days
SP
—
0.407
0.355
0.304
0.407
SE
—
0.094
0.085
0.067
0.042
Cumulative survival rates in 30 days
SP
—
0.18
—
0.152
0.273
SE
—
0.083
—
0.058
0.040
Mean ECMO weaning hours
224.6
165.8
149.3
126.6
175.6
SE of ECMO weaning hours
30.0
28.6
34.3
22.7
21.7
95% CI of ECMO weaning hours
165.30–283.01
109.81–221.78
81.99–216.58
82.07–171.04
133.04–218.17
Cumulative ECMO weaning rates in 48 hours
SP
0.762
—
—
0.644
0.662
SE
0.078
—
—
0.071
0.041
Cumulative ECMO weaning rates in 72 hours
SP
—
—
—
0.468
0.569
SE
—
—
—
0.077
0.044
Cumulative ECMO weaning rates in 192 hours
SP
0.527
0.406
0.245
—
0.366
SE
0.113
0.109
0.101
—
0.049
ECMO, extracorporeal membrane oxygenation; CI, confidence interval; SE, standard error; SP, survival proportion.
