Table 2 Cox proportional hazard models for 28-day all-cause death.

Model 1^a

1.000 (Ref.)

2.266 (1.385–3.708)

4.970 (3.158–7.821)

P value

–

0.001

<0.001

Model 2^b

1.000 (Ref.)

2.233 (1.351–3.691)

4.259 (2.668–6.796)

P value

–

0.002

<0.001

Model 3^c

1.000 (Ref.)

2.198 (1.329–3.635)

4.096 (2.564–6.544)

P value

–

0.012

<0.001

Model 4^d

1.000 (Ref.)

1.794 (1.082–2.974)

2.720 (1.688–4.385)

P value

–

0.024

<0.001

Model 5^e

1.000 (Ref.)

1.725 (1.035–2.874)

1.991 (1.214–3.266)

P value

–

0.036

0.006