Chronic air pollution and social deprivation as modifiers of the association between high temperature and daily mortality

Table 2 Mortality rates attributable to summer temperatures (per 100 000) by strata

Strata	Population	Mortality rates (per 100 000) ^a	p for heterogeneity ^b
Total	2234105	5.37 [5.01;5.73]
Age
Under 65 years	1921330	0.78 [0.62;0.88]	0.001
More than 65 years	312774	33.57 [31.65;35. 81]
Sex
Female	1161734	5.51 [4.99;5.85]	0.51
Male	1072370	5.22 [4.76;5.67]
Social Deprivation
Low Social Deprivation	692572	4.33 [3.31;5.23]	0.08
Medium Social Deprivation	781936	4.60 [3.59;5.41]
High Social Deprivation	743956	7.26 [6.74;7.85]
Chronic air pollution exposure
Low Chronic NO2 Exposure	737254	4.75 [4.13;5.22]	0.03
≤ 50.6 μg/m³	737254	4.75 [4.13;5.22]	0.03
Medium Chronic NO2 Exposure	795341	5.97 [5.36;6.32]
50.6-55.8 μg/m³	795341	5.97 [5.36;6.32]
High Chronic NO2 Exposure	670231	7.89 [7.28;8.14]
> 55.8 μg/m³	670231	7.89 [7.28;8.14]
Double stratification Low Chronic Exposure Group
Low Social Deprivation	370567	3.78 [2.87;5.03]	0.14
Medium Social Deprivation	381190	4.19 [3.34;5.25]
High Social Deprivation	375341	6.92 [5.11;8.12]
Double stratification High Chronic Exposure Group
Low Social Deprivation	389872	3.59 [2.29;5.07]	0.07
Medium Social Deprivation	391432	5.36 [4.22;6.41]
High Social Deprivation	325701	9.82 [7.79;10.93]

^aFor social deprivation and chronic air pollution strata, mortality rates were standardized for age and sex.
^bHomogeneity test of Chi- square Pearson, for central estimates.

ISSN: 1476-069X