Distribution of health outcomes in participants at 3 years of age, by frequency of use of cleaning products
| Health outcome | Total no. (%) of participants n = 2022 | No. (%) of participants | ||
|---|---|---|---|---|
| Households with low use of cleaning products (FUS < 27) n = 666 | Households with moderate use of cleaning products (FUS ≥ 27 and ≤ 35) n = 700 | Households with high use of cleaning products (FUS > 35) n = 656 | ||
| Recurrent wheeze | 174 (8.6) | 51 (7.7) | 52 (7.4) | 71 (10.8) |
| Recurrent wheeze and atopy* | 42 (2.1) | 10 (1.5) | 12 (1.7) | 20 (3.0) |
| Asthma diagnosis | 129 (6.4) | 32 (4.8) | 45 (6.4) | 52 (7.9) |
| Atopy* | 280 (13.8) | 90 (13.5) | 93 (13.3) | 97 (14.8) |
Note: FUS = Frequency of Use Score. The Distribution of health outcomes among FUS catagories is shown with crude values and percentages for each tertile of the exposure group. The distributions of covariates by tertiles are shown in Appendix 1, Table S1, available at www.cmaj.ca/lookup/suppl/doi:10.1503/cmaj.190819/-/DC1.
↵* We determined atopic status as a positive response to at least 1 of 13 inhalant allergens: Alternaria alternata, cat hair, dog epithelium, house dust mites (Dermatophagoides pteronyssinus and Dermatophagoides farina), grass, Midwest trees, ragweed, weeds, cladosporium, penicillium, aspergillus and German cockroach, and 4 food allergens (whole cow’s milk, egg white, soybean and peanuts).