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Table 5 Unadjusted and adjusted coefficients of hospital volume for different outcome measures, expressed as odds ratio or beta

From: The volume-outcome relationship among severely injured patients admitted to English major trauma centres: a registry study

Outcome

OR per 10 patients

95% CI

P-value

In-hospital mortality

 Unadjusted OR

1.64

1.04–2.61

0.03

 Adjusted* OR

1.01

0.64–1.60

0.96

 

Beta

Length of stay (days)

 Unadjusted β

0.66

−0.15 - 1.47

0.11

 Adjusted* β

0.40

− 0.45 - 1.24

0.34

Critical care length of stay (days)

 Unadjusted β

−0.02

−0.36 – 0.32

0.89

 Adjusted* β

−0.04

−0.32 – 0.23

0.76

Time to operation (hours)

 Unadjusted β

0.004

−0.03 - 0.03

0.97

 Adjusted* β

0.005

−0.03 – 0.03

0.75

Time to CT (hours)

 Unadjusted β

−0.03

−0.05 - -0.01

0.01

 Adjusted* β

−0.003

−0.007 - 0.001

0.11

  1. *Adjusted for age, gender, age*gender (interaction term), NISS (spline), Revised Trauma Score, Charlson Comorbidity Index, penetrating injury, referred patients