Table 2: Percentage increase (95% CI) in mortality for 1 °C decrease in mean temperature on extreme cold days (and following seven consecutive days) and its association with sex and age.

% Increase 95% CI P
All-cause death 8.6 1.074-1.097 < 0.001
Sex 8 0.860-0.982 0.012
Age (> 70 yrs) 2.3 1.136-1.321 < 0.001

Regression analyses were conducted on extreme cold day's temperature and following days; an offset was added in the model to mould mortality rates per year-by-season-by-month.