Table 2:

Percentage of days with self-reported activities and observations among 20 participants in Western Montana, June through October 2022

Self-reported activity/observation	Wildfire vs non-Wildfire days	Total days activity/observation was reported (n = 2091 days of follow-up)	Summary statistics^a	Association with indoor PM_2.5^a
Self-reported activity/observation	Wildfire vs non-Wildfire days		mean (sd) min, P25, median, P75, max	Estimate^b (95% CI)
Windows and/or doors left open for ventilation	Non-wildfire days	993	62.0 (41.7) 0, 14.3, 76.9, 100, 100	2.6 (0.2, 5.1)
Windows and/or doors left open for ventilation	Wildfire days	174	43.3 (36.2) 0, 12.5, 42.9, 66.7, 100	11.4 (6.4, 16.7)
Ambient air pollution or haze observed	Non-wildfire days	387	23.8 (29.7) 0, 0, 14.3, 37.5, 100	3.0 (−0.4, 6.5)
Ambient air pollution or haze observed	Wildfire days	281	72.1 (28.3) 0, 50, 75, 100, 100	7.7 (0.7, 15.3)
Cleaning (dusting/sweeping) occurred in the home	Non-wildfire days	307	20.7 (18.0) 0, 0, 15.5, 28.6, 100	9.2 (3.4, 15.3)
Cleaning (dusting/sweeping) occurred in the home	Wildfire days	52	15.0 (15.9) 0, 0, 14.3, 28.6, 71.4	17.0 (3.1, 32.7)
Incense burned in the home	Non-wildfire days	17	1.3 (6.6) 0, 0, 0, 0, 57.1	22.7 (5.1, 43.3)
Incense burned in the home	Wildfire days	8	3 (13.5) 0, 0, 0, 0, 66.7	9.5 (−8.4, 30.9)
Candle burned in the home	Non-wildfire days	25	1.9 (6.4) 0, 0, 0, 0, 42.9	14.1 (−2.9, 34.0)
Candle burned in the home	Wildfire days	1	0.4 (2.6) 0, 0, 0, 0, 16.7	25.3 (−50.4, 216.4)
Smoke from cooking in the home	Non-wildfire days	118	8.4 (14.9) 0, 0, 0, 14.3, 85.7	13.2 (5.9, 20.9)
Smoke from cooking in the home	Wildfire days	24	7.3 (15.1) 0, 0, 0, 9.2, 71.4	3.4 (−10.7, 19.6)
Gas stove used inside the home	Non-wildfire days	307	22.5 (37.2) 0, 0, 0, 35.1, 100	2.2 (−0.6, 5.0)
Gas stove used inside the home	Wildfire days	74	22.6 (38.6) 0, 0, 0, 26.8, 100	−4.5 (−9.9, 1.3)
Charcoal grill used outside the home	Non-wildfire days	24	1.9 (6.5) 0, 0, 0, 0, 42.9	−2.1 (−16.4, 14.7)
Charcoal grill used outside the home	Wildfire days	10	2.9 (9.7) 0, 0, 0, 0, 42.9	5.2 (−17.8, 34.5)
Gas grill used outside the home	Non-wildfire days	82	6.4 (12.7) 0, 0, 0, 14.3, 100	−4.0 (−11.3, 4.0)
Gas grill used outside the home	Wildfire days	20	5.9 (10.1) 0, 0, 0, 13.4, 33.3	−4.6 (−24.7, 20.7)
Mowing lawn/grass occurred outside the home	Non-wildfire days	149	11.0 (13.5) 0, 0, 11.1, 14.3, 66.7	1.3 (−5.9, 9.1)
Mowing lawn/grass occurred outside the home	Wildfire days	34	10.6 (12.7) 0, 0, 12.5, 14.3, 42.9	25.4 (6.5, 47.7)
Construction occurred outside the home	Non-wildfire days	92	6.8 (20.4) 0, 0, 0, 0, 100	7.7 (2.5, 13.1)
Construction occurred outside the home	Wildfire days	27	8.2 (26.3) 0, 0, 0, 0, 100	10.0 (1.2, 19.5)

PM_2.5 = fine particulate matter; sd = standard deviation; min = minimum; P25 = 25^th percentile; P75 = 75^th percentile; max = maximum; CI = confidence interval

Surveys were sent out electronically each week, but occasionally were not taken on the intended/scheduled day. For the self-reported activities/observations above, participants were told the number of days since their previous survey and asked to report the number of days each activity or observation occurred. Table 2 is reporting statistics on the percentage of days each activity or observation occurred out of the total number of days since the previous survey was taken.

Estimates are presented as percent change in geometric mean indoor PM_2.5 (since the previous survey) per 10% increase in days with self-reported activity/observation.