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Risk of selected eye diseases in people admitted to hospital for hypertension or diabetes mellitus: record linkage studies – Authors’ response
  1. Michael J Goldacre1,
  2. Clare J Wotton1,
  3. Tiarnan D L Keenan2,3
  1. 1Unit of Health-Care Epidemiology, Department of Public Health, University of Oxford, Oxford, UK
  2. 2Fight For Sight Clinical Fellow, Faculty of Medical and Human Sciences, University of Manchester, Manchester, UK
  3. 3Manchester Royal Eye Hospital, Manchester, UK
  1. Correspondence to Tiarnan D L Keenan, Manchester Royal Eye Hospital, Oxford Road, Manchester M13 9WH, UK; tiarnan.keenan{at}

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We would like to respond to the letter from Carrie Huisingh and Gerald McGwin.1 They assert that we should have been more technical in our use of the term ‘risk’.2 Our use is supported by the International Dictionary of Epidemiology published by the International Epidemiological Association as the gold standard on the use of epidemiological terms. It describes the use of the term risk in epidemiology as follows: ‘risk: the probability that an event will occur, eg that an individual will become ill or die within a stated period of time or by a certain age. Also, a non-technical term encompassing a variety of measures of the …

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