Table 3 Univariable and multivariable logistic regression analyses for the 28-day ICU mortality

Female

178/546 (32.6%)

Ref.

Male

218/696 (31.3%)

1.061 (0.834–1.348)

0.631

/

/

Age < 65 yrs

129/468 (27.6%)

Ref.

Age ≥ 65 yrs

267/774 (34.5%)

1.526 (1.188–1.960)

0.001

1.479 (1.110–1.971)

0.008

Never smoker

292/894 (72.0%)

Ref.

Smoker

104/348 (28.0%)

0.879 (0.672–1.150)

0.346

/

/

SAPS II < 37

101/547 (18.5%)

Ref.

SAPS II ≥ 37

270/627 (43.1%)

2.340 (2.555–4.365)

< 0.001

2.009 (1.468–2.747)

< 0.001

SOFA < 3

122/540 (22.6%)

Ref.

SOFA ≥ 3

274/659 (41.6%)

2.438 (1.891–3.145)

< 0.001

1.709 (1.274–2.292)

< 0.001

No metastasis

151/587 (25.7%)

Ref.

Metastasis

245/655 (37.4%)

1.725 (1.352–2.201)

< 0.001

1.763 (1.326–2.345)

< 0.001

Without HTN

193/624 (30.9%)

Ref.

HTN

203/618 (32.8%)

1.092 (0.860–1.387)

0.468

/

/

Without COPD

221/713 (31.0%)

Ref.

COPD

175/529 (33.1%)

1.101 (0.865–1.400)

0.436

/

/

Without HF

315/1035 (30.4%)

Ref.

HF

81/207 (39.1%)

1.469 (1.079–2.001)

0.015

1.110 (0.776–1.560)

0.591

Without DM

313/1018 (30.7%)

Ref.

DM

83/224 (37.1%)

1.326 (0.980–1.793)

0.067

1.257 (0.898–1.759)

0.182

Without

351/1125 (31.2%)

Ref.

With CKD

45/117 (38.5%)

1.378 (0.930–2.042)

0.110

0.878 (0.557–1.384)

0.576

Without hyperlipidemia

292 (33.3%)

Ref.

Hyperlipidemia

104/365 (28.5%)

0.798 (0.611–1.043)

0.098

0.760 (0.567–1.020)

0.068

Without MV

202/756 (26.7%)

Ref.

With MV

194/443 (43.8%)

2.137 (1.669–2.736)

< 0.001

1.584 (1.196–2.098)

0.001

Without vasopressor

285/919 (31.0%)

Ref.

With vasopressor

111/280 (39.6%)

1.461 (1.107–1.928)

0.007

0.916 (0.662–1.267)

0.594