Table 3

 Charlson index and coding depth over three years. Values are mean (SD)

Variable and hospitalYear 1: April 2005 to March 2006Year 2: April 2006 to March 2007Year 3*: April to October 2007
Charlson index
George Eliot Hospital0.79 (1.18)0.88 (1.28)1.02 (1.33)
Mid Staffordshire Hospitals0.57 (1.01)0.93 (1.15)0.96 (1.18)
University Hospitals Coventry and Warwickshire1.09 (1.46)1.33 (1.54)1.19 (1.38)
University Hospital North Staffordshire1.54 (1.73)1.70 (1.58)1.44 (1.56)
Coding depth
George Eliot Hospital1.61 (1.75)2.47 (2.23)2.54 (2.23)
Mid Staffordshire Hospitals1.49 (1.70)1.48 (1.57)1.83 (1.84)
University Hospitals Coventry and Warwickshire1.42 (1.52)1.61 (1.58)1.74 (1.65)
University Hospital North Staffordshire2.12 (1.91)2.63 (2.14)2.65 (2.34)

*Year 3 is a part year—most recent data available at time of study.