The number of excess winter deaths depends on the temperature and the level of disease in the population as well as other factors, such as how well equipped people are to cope with the drop in temperature. Most excess winter deaths are due to circulatory and respiratory diseases, and the majority occur among the elderly population.[i]
Excess winter deaths are defined as the difference between the number of deaths which occurred in winter (December to March) and the average number of deaths during the preceding four months (August to November) and the subsequent four months (April to July). Excess Winter Deaths Index (EWD Index) is the excess winter deaths measured as the ratio of extra deaths from all causes that occur in the winter months compared with the expected number of deaths, based on the average of the number of non-winter deaths.
The related data in spreadsheet format, including district figures and trend graphs, is available to download in the further analysis and data section below.
[i] ONS Statistical Bulletin: Excess Winter Mortality in England and Wales, 2016 to 2017 (provisional) and 2015 to 2016 (final)
Further analysis and data
Excess winter deaths in Lancashire-14 (XLS 176 KB)
Page updated January 2018