Table 4 Univariate and multivariate analysis of predictors for prolonged postoperative hospital stays (> 28 days)

Age

1.09 (1.02–1.16)

0.010

1.06 (0.99–1.13)

0.086

Sex (Female)

0.81 (0.41–1.63)

0.558

—

BMI

1.03 (0.93–1.14)

0.551

—

Preoperative TBIL

1.03 (0.94–1.13)

0.499

Preoperative bile drain

0.72 (0.36–1.46)

0.360

CCI

 20–1

Reference

—

 2–5

1.63 (0.72–3.65)

0.239

—

ASA physical status

 I-II

Reference

—

 III-V

1.86 (0.86–4.04)

0.114

—

GNRI score

 No risk

Reference

Reference

 Low risk

2.09 (0.80–5.46)

0.134

1.94 (0.73–5.14)

0.180

 High/moderate risk

4.64 (1.98–10.86)

 < 0.001

3.91 (1.63–9.37)

0.002

 MIS approach^a

0.42 (0.16–1.10)

0.077

—

Operative time

 Time < 8 h

Reference

—

 Time > 8 h

1.33 (0.67–2.63)

0.413

—

Operative blood loss

  < 400 ml

Reference

—

  > 400 ml

2.03 (0.94–4.35)

0.068

—

 Fistula Risk Score

1.14 (0.96–1.34)

0.131

—