Table 5 Univariate and multivariate analyses of risk factors for serious complications in patients over 80 years of age

Gender

Female

1 (ref)

Male

1.726 (0.730–4.077)

0.214

Charlson age comorbidity index

< 7

1 (ref)

≥ 7

1.520 (0.486–4.751)

0.472

Body mass index, kg/m²

> 20

1 (ref)

1 (ref)

18.5–20.0

1.095 (0.302–3.965)

0.890

-

< 18.5

4.078 (1.322–12.580)

0.014

4.254 (1.273–14.221)

0.019

ASA PS classification

< 3

1 (ref)

≥ 3

1.226 (0.502–2.995)

0.654

Previous abdominal surgery

No

1 (ref)

Yes

1.421 (0.501–4.034)

0.509

Severity of acute cholecystitis

Mild

1 (ref)

1 (ref)

Moderate

3.604 (1.366–9.512)

0.010

3.545 (1.282–9.807)

0.015

Severe

4.463 (1.204–16.535)

0.025

3.924 (1.012–15.211)

0.048

WBC, 10³/mm3

< 18.0

1 (ref)

≥ 18.0

0.862 (0.244–3.038)

0.817

Albumin, g/dL

≥ 2.5

1 (ref)

1 (ref)

< 2.5

6.711 (1.852–24.318)

0.004

4.414 (1.136–17.153)

0.032

Total bilirubin, mg/dL

< 2.0

1 (ref)

≥ 2.0

1.019 (0.403–2.574)

0.968

Creatinine, mg/dL

< 2.0

1 (ref)

≥ 2.0

3.436 (0.886–13.327)

0.074

CRP, mg/dL

< 20.0

1 (ref)

≥ 20.0

1.795 (0.685–4.702)

0.234

EST

No

1 (ref)

Yes

0.268 (0.061–1.172)

0.080

PTGBD

No

1 (ref)

Yes

0.661 (0.260–1.683)

0.385