Table 3 Multivariable analysis for survival to hospital discharge (OR > 1). The independent factor is the dichotomized variable, anemia based on the lowest hemoglobin in the 48 h preceding the arrest

Model 1: excluding patients that did not achieve ROSC (in order to control for post-CPR treatments)

N = 348, goodness o fit p value = 0.509

Variable

Univariable

Multivariable

OR

95% CI

P value

OR

95% CI

P value

Age

0.970

0.956–0.984

 < 0.001

0.998

0.978–1.017

0.819

CCI

0.839

0.719–0.979

0.026

0.741

0.592–0.927

0.009

Initial shockable rhythm

4.581

2.681–8.779

 < 0.001

3.896

1.698–8.940

0.001

Adrenaline (mg)

0.663

0.575–0.764

 < 0.001

0.664

0.561–0.784

 < 0.001

Coronary angiography

2.569

1.094–6.033

0.035

7.720

2.302–25.897

0.001

Lowest hemoglobin anemia

0.715

0.435–1.173

0.183

0.701

0.363–1.352

0.289

Model 2: sensitivity analysis including patients that did not achieve ROSC (OR > 1)

N = 700, goodness of fit P value = 0.342

Variable

Univariable

Multivariable

OR

95% CI

P value

OR

95% CI

P value

Age

0.970

0.956–0.984

 < 0.001

0.980

0.963–0.997

0.022

CCI

0.839

0.719–0.979

0.026

0.816

0.684–0.974

0.024

Initial shockable rhythm

4.581

2.681–8.779

 < 0.001

5.478

2.610–11.497

 < 0.001

Adrenaline (mg)

0.663

0.575–0.764

 < 0.001

0.652

0.560–0.759

 < 0.001

Lowest hemoglobin anemia

0.715

0.435–1.173

0.183

0.712

0.390–1.301

0.269