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Table 3 Methods of calculating risk categories and weights

From: Direct risk standardisation: a new method for comparing casemix adjusted event rates using complex models

Creating categories of risk

Weights for combining risk category specific event rates for each centre

Equal width: 0.0-0.1, 0.1-0.2, 0.2-0.3, etc.

Equal

Equal numbers of patients in each

Proportion of all patients in each category

Equal numbers of observed deaths in each

Proportion of all observed deaths in each category

Equal numbers of predicted deaths in each

Proportion of all predicted deaths in each category