Table 1. Correlations between COVID-19-related ICU admissions in the Paris region and temperatures measured from 19 days before ICU admission to the date of admission (study period: 31 March to 10 May 2020).

Day	Minimal observed temperature		Mean calculated temperature		Maximal observed temperature
	Correlation coefficient	p value	Correlation coefficient	p value	Correlation coefficient	p value
−19	−0.246	0.121	−0.430	0.005	−0.523	<0.0025
−18	−0.311	0.048	−0.493	<0.0025	−0.582	<0.0025
−17	−0.333	0.034	−0.520	<0.0025	−0.609	<0.0025
−16	−0.409	0.008	−0.554	<0.0025	−0.615	<0.0025
−15	−0.451	0.003	−0.570	<0.0025	−0.610	<0.0025
−14	−0.449	0.003	−0.552	<0.0025	−0.586	<0.0025
−13	−0.471	<0.0025	−0.561	<0.0025	−0.583	<0.0025
−12	−0.528	<0.0025	−0.631	<0.0025	−0.656	<0.0025
−11	−0.609	<0.0025	−0.699	<0.0025	−0.705	<0.0025
−10	−0.685	<0.0025	−0.733	<0.0025	−0.706	<0.0025
−9	−0.752	<0.0025	−0.749	<0.0025	−0.685	<0.0025
−8	−0.789	<0.0025	−0.767	<0.0025	−0.687	<0.0025
−7	−0.755	<0.0025	−0.709	<0.0025	−0.611	<0.0025
−6	−0.703	<0.0025	−0.657	<0.0025	−0.561	<0.0025
−5	−0.632	<0.0025	−0.581	<0.0025	−0.482	<0.0025
−4	−0.604	<0.0025	−0.568	<0.0025	−0.478	<0.0025
−3	−0.590	<0.0025	−0.546	<0.0025	−0.449	0.003
−2	−0.655	<0.0025	−0.589	<0.0025	−0.472	<0.0025
−1	−0.641	<0.0025	−0.557	<0.0025	−0.420	0.006
0	−0.569	<0.0025	−0.465	<0.0025	−0.313	0.046

ICU, intensive care unit.