TABLE 2.

Associations between the frequency of use of household cleaning products and current asthma

	All	Never asthma	Current asthma	Crude OR	Adjusted OR a	p trend
	n = 41 570	n = 37 426	n = 4144	[95% CI]	[95% CI]
Not weekly exposed to any of the six large categories (ref)	n = 10 760	n = 9790	n = 970	1.00	1.00
Irritants
1–3 days/week	n = 11 670	47.0%	51.5%	1.25 [1.15–1.37]	1.22 [1.11–1.34]	<0.0001
4–7 days/week	n = 2172	8.7%	9.7%	1.27 [1.10–1.47]	1.30 [1.11–1.52]
Sprays
1–3 days/week	n = 11 304	43.2%	44.6%	1.19 [1.09–1.30]	1.13 [1.02–1.24]	<0.0001
4–7 days/week	n = 4005	14.9%	19.1%	1.47 [1.31–1.65]	1.37 [1.22–1.55]
Scented products
1–3 days/week	n = 9628	37.9%	40.6%	1.23 [1.12–1.35]	1.14 [1.03–1.25]	0.0018
4–7 days/week	n = 4847	18.9%	21.7%	1.32 [1.18–1.47]	1.19 [1.06–1.33]
Disinfecting wipes
1–3 days/week	n = 6442	33.3%	37.9%	1.32 [1.19–1.46]	1.18 [1.06–1.31]	<0.0001
4–7 days/week	n = 1896	9.6%	12.7%	1.52 [1.31–1.76]	1.32 [1.13–1.55]
Green products
1–3 days/week	n = 10 039	42.2%	43.4%	1.10 [1.00–1.21]	1.07 [0.97–1.18]	0.0182
4–7 days/week	n = 2939	12.2%	14.0%	1.22 [1.07–1.40]	1.18 [1.03–1.36]
Homemade products
1–3 days/week	n = 3429	21.8%	24.9%	1.24 [1.09–1.41]	1.15 [1.01–1.31]	0.0017
4–7 days/week	n = 1303	8.2%	10.6%	1.41 [1.18–1.69]	1.31 [1.08–1.58]

^a Adjusted Odds Ratio (OR) for gender, age, smoking status, BMI, and educational level of associations between the frequency of use of household cleaning products and current asthma, obtained by logistic regression models; results presented in bold are significant