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Table 5 Factors associated with a higher risk of in-hospital mortality in patients readmitted to the intensive care unit (ICU).

From: Readmission to a surgical intensive care unit: incidence, outcome and risk factors

 

Univariate

Multivariate

 

Odds ratio (95% CI)

p value

Odds ratio (95% CI)

p value

Age (per 10 years)

1.18 (0.97 to 1.44)

0.108

-

-

Female

0.98 (0.89 to 1.21)

0.205

-

-

Source of admission

    

   Operating room

Reference

NA

-

-

   Emergency room

1.21 (0.39 to 3.79)

0.741

-

-

   Other hospital

1.08 (0.42 to 2.76)

0.877

-

-

Cancer

2.21 (1.21 to 4.03)

0.010

1.69 (0.81 to 3.53)

0.161

Chronic heart failure

1.22 (0.25 to 5.89)

0.803

-

-

Cirrhosis

1.22 (0.25 to 5.89)

0.803

-

-

Chronic renal failure

2.57 (1.30 to 5.08)

0.006

2.39 (1.10 to 5.20)

0.028

Diabetes

1.30 (0.72 to 2.36)

0.380

-

-

Unplanned admissions

0.88 (0.48 to 1.60)

0.667

-

-

Sepsis during initial ICU stay

    

   No sepsis

Reference

NA

-

-

   Sepsis

1.44 (0.60 to 3.48)

0.419

-

-

   Severe sepsis

0.64 (0.18 to 2.34)

0.501

-

-

Type of surgery

    

   Neurosurgery

0.35 (0.12 to 1.00)

0.051

0.46 (0.14 to 1.48)

0.193

   Thoracic surgery

1.42 (0.45 to 4.44)

0.553

-

-

   Cardiac surgery

0.49 (0.26 to 0.92)

0.026

0.54 (0.23 to 1.25)

0.149

   Gastrointestinal

3.39 (1.90 to 6.04)

< 0.001

2.60 (1.17 to 5.80)

0.020

   Trauma

2.19 (0.81 to 5.94)

0.122

2.27 (0.72 to 7.18)

0.165

Time to readmission

    

   Within 48 hours

References

NA

Reference

NA

   2 to 7 days

1.05 (0.42 to 2.66)

0.914

0.81 (0.34 to 2.26)

0.792

   > 7 days

2.02 (0.81 to 5.02)

0.131

1.73 (0.69 to 4.37)

0.245

Severity scores (per point) *

    

   SAPS 2 score **

1.02 (1.01 to 1.03)

0.043

1.02 (1.01 to 1.04)

0.045

   SOFA score **

1.04 (0.97 to 1.13)

0.276

1.07 (0.98 to 1.16)

0.163

   SOFAmax

1.03 (0.96 to 1.11)

0.382

1.05 (0.97 to 1.14)

0.231

  1. Hosmer and Lemeshow chi-squared = 7.1, p = 0.526.
  2. * Introduced sequentially in the model due to co-linearity.
  3. ** On initial admission to the ICU.
  4. CI = confidence interval; SAPS = simplified acute physiology score; SOFA = sequential organ failure score.