Use of computerised general practice data for population surveillance: comparative study of influenza data.
OBJECTIVE: To assess the potential for using routine computerised general practice data for surveillance of illness. DESIGN: Comparison of the incidence of influenza during the 1989 epidemic derived from a computerised database with that derived from the Royal College of General Practitioners's weekly returns service--a well established predominantly manual surveillance system. SETTING: 433 general practices throughout the United Kingdom that used a commercial computer system linked to a cent...Expand abstract
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