To the editor
Indoor exposure to formaldehyde is a major health concern, especially for school-age children who spend most of their time indoors(1), because at room temperature, formaldehyde evaporates from wood-based products, flooring materials, paints, fabrics, cosmetics, cleaning products, and air fresheners. Evidence supporting a link of indoor formaldehyde exposure with asthma and rhinitis is controversial, in that previous studies have reported a negative association,(2) no association,(3) and a positive association.(4) Furthermore, few studies have examined the major formaldehyde metabolite (thiazolidine-4-carboxylic acid [TZCA]), or sensitization to formaldehyde in subjects with asthma and/or rhinitis.
Keywords: foramaldehyde; asthma; allergic rhinitis