期刊
INDOOR AIR
卷 25, 期 6, 页码 582-597出版社
WILEY
DOI: 10.1111/ina.12181
关键词
Asthma; Children; Respiratory symptoms; Field study; Ventilation; Indoor air; Home
类别
资金
- Asthma Education Centre
- Department of Allergy and Immunology
- NRC
- INSPQ
- CMHC
- National Research Council of Canada through Government of Canada's Clean Air Agenda
- Ministere de la sante et des services sociaux du Quebec
- Canada Mortgage and Housing Corporation and Health Canada
A randomized controlled trial was carried out to measure the impact of an intervention on ventilation, indoor air contaminants, and asthma symptoms of children. Eighty-three asthmatic children living in low-ventilated homes were followed over 2years. Several environmental parameters were measured during the summer, fall, and winter. The children were randomized after Year 1 (43 Intervention; 40 Control). The intervention included the installation of either a Heat Recovery Ventilator (HRV) or Energy Recovery Ventilator (ERV). During the fall and winter seasons, there was a significant increase in the mean ventilation rate in the homes of the intervention group. A statistically significant reduction in mean formaldehyde, airborne mold spores, toluene, styrene, limonene, and -pinene concentrations was observed in the intervention group. There was no significant group difference in change in the number of days with symptoms per 14days. However, there was a significant decrease in the proportion of children who experienced any wheezing (1 episode) and those with 4 episodes in the 12-month period in the intervention group. This study indicates that improved ventilation reduces air contaminants and may prevent wheezing. Due to lack of power, a bigger study is needed.
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