Up to half of all heart attack cases are missed using just one data source Failure to use linked electronic health records may lead to biased estimates of heart attack incidence and outcome, warn researchers in a paper published on bmj.com today. They show that up to 50% of all heart attack cases are missed using just one data source. These findings may be relevant to other common conditions, such as stroke, and support the wider use of linked multiple record sources by clinicians, policy makers and researchers, say the authors...

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