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Table 2 Comparison between survival models in hospital readmissions in patients with SCD admitted to a public university hospital, southeastern Brazil, 2000–2004

From: Factors associated with hospital readmission in sickle cell disease

Clinical characteristics

    
 

AG model

Frailty Model

 

HR

95% CI

HR

95% CI

Age

0.99

0.96–1.02

0.98

0.94–1.01

Phenotype

    

Others

1.00

 

1.00

 

SS

1.60

0.92–2.77

1.96

0.88–4.37

Vaso-occlusive crisis

    

No

1.00

 

1.00

 

Yes

2.06

1.23–3.45

2.14

1.19–3.87

Acute chest syndrome

    

No

1.00

 

1.00

 

Yes

1.30

0.54–3.11

1.23

0.56–2.73

Bacterial infection

    

No

1.00

 

1.00

 

Yes

0.90

0.54–1.51

0.89

0.51–1.53

Chronic renal failure

    

No

1.00

 

1.00

 

Yes

22.17

10.13–48.54

27.25

5.11–145.43

Opiates

    

No

1.00

 

1.00

 

Yes

1.32

0.62–2.84

0.70

0.33–1.46

Number of red cell concentrate transfusions

1.04

0.86–1.26

1.03

0.87–1.23

Length of hospital stay (days)

0.99

0.96–1.02

1.00

0.96–1.03

Frailty Variance

  

0.85

p = 0.00000

  1. AG = Andersen-Gill; HR = hazard ratio