Excess Winter Mortality

The number of deaths can vary depending on the season and in particular tend to increase in the winter. This section presents Excess Winter Mortality: the difference between the actual number of winter deaths in the 4 month period December to March and the expected number of deaths.

The expected number of deaths is a 4 month average of the number of non-winter deaths: deaths in the two four month periods which precede winter (August to November) and follow winter (April to July).