Table 3 Univariate and multivariate analysis of overall survival

Age (very elderly/elderly)

1.967 (1.561–2.478)

 < 0.01**

1.881 (1.490–2.375)

 < 0.01**

Sex (male/female)

0.876 (0.717–1.071)

0.197

BMI (>/≤ 22.3)

0.837 (0.687–1.020)

0.078

0.890 (0.730–1.085)

0.249

Hypertension (yes/no)

0.890 (0.723–1.096)

0.273

T2DM (yes/no)

1.048 (0.803–1.367)

0.730

Tumor location (colon/ rectum)

1.262 (1.037–1.536)

0.020*

1.192 (0.977–1.453)

0.083

Tumor stage (III/II/I)

1.826 (1.571–2.123)

 < 0.01**

1.856 (1.595–2.160)

 < 0.01**

Smoking (yes/no)

1.128 (0.923–1.378)

0.241

Drinking (yes/no)

1.035 (0.835–1.284)

0.752

CHD (yes/no)

1.065 (0.725–1.564)

0.748

Overall complications (yes/no)

1.638 (1.340–2.002)

 < 0.01**

1.513 (1.224–1.871)

 < 0.01**

Major complications (yes/no)

2.173 (1.460–3.235)

 < 0.01**

2.022 (1.325–3.084)

0.001**