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Table 4 Multivariable Cox regression analysis results

From: Risk factors for postoperative delirium in patients with triple-branched stent graft implantation

Variables β SE Wald AHR 95%CI P
Nature of occupation
Manual worker Reference
Non-manual worker −0.591 0.257 5.313 0.554 0.335–0.915 0.021
APACHE-II score
< 15 Reference
15–20 0.241 0.265 0.829 1.272 0.758–2.137 0.362
> 20 1.212 0.345 12.316 3.359 1.707–6.609 < 0.001
Hypoxemia 0.613 0.256 5.745 1.846 1.118–3.048 0.017
Analgesics and sedatives
≤2 Reference
3–4 0.753 0.311 5.855 2.122 1.154–3.904 0.016
> 4 1.219 0.437 7.777 3.383 1.436–7.967 0.005
  1. SE Standard error, AHR Adjusted hazard ratio, CI Confidence intervals
  2. Age, body mass index and mechanical ventilation duration have been adjusted
  3. APACHE-II Acute physiology and chronic health evaluation II