Table 3.

Main effects from a univariable analysis of relationship between 1°C fall in average temperature in °C (3-days lag period)^a and death (odds ratios [P-value]), using 28th day before and after date of death as control days

	3-days lag			13-days lag
	OR	95% CI	P	OR	95% CI	P
Overall	1.011	1.007 to 1.015	<0.001	1.013	1.008 to 1.018	<0.001
Winter timeb	1.079	1.067 to 1.091	<0.001	1.138	1.121 to 1.155	<0.001

^aBased on temperatures of date of death and 3 days previous (case day), and 28th day before date of death and 3 days previous and 28th day after date of death and 3 days previous (control days).

^bThose who died in the months December to March of diseases of the circulatory system, respiratory system, nervous system, or mental and behavioural disorders.