Upgrading home heating systems improved subjective symptoms in children with asthma
Prof P Howden-Chapman, University of Otago, Wellington, New Zealand; email@example.com
Does upgrading home heating systems improve the health of children with asthma?
randomised controlled trial. ClinicalTrials.gov NCT00489762
baseline measures taken during winter 2005 and follow-up measures taken during winter 2006.
households in 5 communities in New Zealand.
409 children 6–12 years of age who had physician diagnosed asthma that was symptomatic in the previous year and slept ⩾4 nights/week in a house with a less effective form of heating (unflued gas or plug-in electric heaters).
installation of a non-polluting, more effective replacement heater (heat pump, wood pellet burner, or flued gas) before winter 2006 (n = 200) or maintenance of the old heating system for another winter (n = 209) (this group received new heaters after completion of the trial). Houses in both groups were insulated to …