Table 2 Unadjusted and adjusted Cox models with gamma frailty (total number of events: 469) on mortality in 6872 hospital admissions. The HR of SIPI (> 50 vs ≤50) was estimated separately within 2 time-intervals: before and after day 10 since admission. The effect of SIPI as a continuous variable estimated on a separate multivariable model is also reported

1.483 (1.363;1.613)

< 0.001

1.233 (1.127;1.350)

< 0.001

1.050 (0.875;1.260)

0.640

1.266 (1.051;1.527)

0.013

1.612 (1.333;1.949)

< 0.001

1.638 (1.348;1.991)

< 0.001

5.037 (2.086;12.160)

< 0.001

2.732 (1.125;6.637)

0.026

1.609 (1.238;2.091)

< 0.001

1.606 (1.235;2.089)

< 0.001

1.654 (1.252;2.186)

< 0.001

1.258 (0.950;1.665)

0.110

7.907 (5.450;11.473)

< 0.001

6.576 (4.496;9.617)

< 0.001

2.868 (2.048;4.016)

< 0.001

2.583 (1.831;3.644)

< 0.001

1.634 (1.526;1.749)

< 0.001

1.633 (1.519;1.756) ^a

< 0.001^a

1.260 (1.183;1.341)

< 0.001

1.255 (1.176;1.339) ^a

< 0.001^a