Table 3 Stepwise linear regression analysis for significant variables affecting final outcomes

HADS depression

Age

0.542 (0.291–0.954)

0.012*

Diabetes mellitus

0.505 (0.341–0.819)

0.041*

HADS anxiety

Age

0.569 (0.431–0.830)

0.024*

Diabetes mellitus

0.621 (0.258–0.921)

0.039*

Cognition (MMSE)

Hypertension

0.546 (0.205–0.743)

0.043*

Age

2.417 (1.544–6.541)

0.014*

Total bypass time

2.621 (1.258–8.921)

0.029*

Ischemic time

2.418 (1.574–9.623)

0.041*

Delirium

2.541 (1.974–7.519)

0.001*

SF-36 (physical)

ICU-LOS

1.423 (1.326–4.203)

0.001*

Diabetes mellitus

0.515 (0.146–0.829)

0.017*

SF-36 (mental)

ICU-LOS

1.631 (1.203–2.691)

0.002*

Diabetes mellitus

1.853 (1.307–7.517)

0.044*