Factor

Odds ratio (95% CI)

p

Charlson comorbidity index ≥ 9

0.251 (0.098 - 0.646)

0.004

Cardiac comorbidity before admission

0.612 (0.401 - 0.933)

0.023

Metastatic malignancy before admission

0.485 (0.282 - 0.835)

0.009

Arrest time at midnight shift (0:00-07:59)

0.403 (0.252 - 0.642)

<0.001