Excess winter deaths are calculated as the difference between the number of deaths during the four winter months (December to March) and the average number of deaths during the preceding autumn (August to November) and the following summer (April to July). Figures for the latest winter are provisional and are rounded to the nearest 100, figures for all other winters are final and are rounded to the nearest 10. The excess winter mortality index is calculated as excess winter deaths divided by the average non-winter deaths, expressed as a percentage.
Further information: http://www.ons.gov.uk/ons/rel/subnational-health2/excess-winter-mortality-in-england-and-wales/2012-13–provisional–and-2011-12–final-/index.html
Identification Number: PE070
Authoring Entity: Office for National Statistics
Producer: Office for National Statistics (ONS)
Copyright: © Crown copyright 2013
Date of Production: 2013-12-16