Table 4 Risk factors for Grade II and above (Method = Enter)

Age

0.429

2.118

0.146

1.536

0.862–2.738

Surgical method

0.186

0.398

0.528

1.204

0.677–2.143

Operative duration

1.065

16.928

< 0.001

2.900

1.746–4.815

IBL

0.871

7.658

0.006

2.389

1.289–4.427

Blood transfusion

0.305

0.968

0.325

1.356

0.739–2.490

Tumor size

0.903

13.361

< 0.001

2.466

1.520–4.001

sCRE

-0.017

4.274

0.039

0.984

0.968–0.999