Case fatality rates after hospital admission for stroke: Authors' reply

doi:10.1136/bmj.326.7398.1086

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Stephen Roberts, statistician,
Michael Goldacre (michael.goldacre@public-health.oxford.ac.uk), director

Unit of Health-Care Epidemiology, Department of Public Health, Institute of Health Sciences, University of Oxford, Oxford OX3 7LF

EDITOR—We agree with the points made about contrasting case fatality rates for intracerebral haemorrhagic and ischaemic stroke. In using administrative databases for comparisons between hospitals and over time, however, many strokes are not specified as haemorrhagic or ischaemic.

We analysed codes for stroke in accordance with the groupings used in NHS indicators of hospital performance in England and Scotland.1 2 …