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Table 2 Daily PM2.5 characteristics for mortality days and referent days

From: Mortality associated with wildfire smoke exposure in Washington state, 2006–2017: a case-crossover study

Characteristic

Number

Number of exposure grid cells

10,106

Average number of wildfire smoke days per grid cell per year

13.1 (SD: 10.8)

Characteristic

PM2.5 (μg/m3) Mean (SD)

Event days (day of death)

6.38 (9.28)

Referent days

6.35 (9.11)

Characteristic

% Wildfire smoke days

Event days (day of death)

5.78

Referent days

5.73

Exposure metric

PM2.5 (μg/m3) Mean (SD)

Humidex Mean (SD)

Wildfire Smoke days

26.4 (31.9)

29.9 (5.53)

Non-Wildfire Smoke days

4.67 (2.53)

24.9 (6.03)