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Humidity control for chronic asthma.

M Singh¹, A Bara, P Gibson

¹Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh, India, 160 012. medinst@pgi.chd.nic.in

The Cochrane Database of Systematic Reviews

|June 22, 2002

Summary

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See all related articles

Dehumidification of the home environment did not show clinical benefits for asthma patients, despite reducing dust mite levels. Further research with larger, double-blind trials is needed to confirm health benefits.

Area of Science:

Environmental Health
Respiratory Medicine
Clinical Trials

Background:

Humidity control in homes is recommended for asthma patients.
The effectiveness of these measures remains uncertain.

Purpose of the Study:

To investigate the impact of home environment dehumidification on asthma control.

Main Methods:

Searched clinical trial registers for studies on humidity control and asthma.
Included one randomized controlled trial evaluating mechanical ventilation and high-efficiency vacuum cleaners.

Main Results:

The single included trial showed no clinical benefit for asthma patients.
A reduction in house dust mite counts and antigen levels was observed.

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The trial was open-label with a small sample size.

Conclusions:

High-quality evidence is lacking regarding the health benefits of dehumidification for asthma.
Further double-blind randomized controlled trials with adequate sample sizes are necessary to assess clinical outcomes.