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Table 1 Details of verification source for 106 self-reported strokes between 2002 and 2009

From: Validating self-reported strokes in a longitudinal UK cohort study (Whitehall II): Extracting information from hospital medical records versus the Hospital Episode Statistics database

Source of verification Number Percent
Not verified – external evidence not stroke 8 7.5%
Not verified – no external confirmation 4 3.8%
HES and hospital notes 55 51.9%
HES only 11 10.4%
Hospital notes only 16 15.1%
GP only 12 11.3%
  106 100.0%