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| Age of onset of asthma or wheezy breathing by synthetic bedding use at
one month of age
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Age of onset of asthma
or wheezy breathing by synthetic bedding use at 1 month of age. Log-rank test for equality
of survivor function, P=0.03. Solid line indicates synthetic pillow and quilt; dotted
line indicates no synthetic pillow or quilt; heavy broken line indicates
synthetic pillow, not quilt; light broken line indicates synthetic quilt, not
pillow. Age of onset analysis showed that, among children with asthma, synthetic bedding use in infancy was associated with an earlier onset of asthma symptoms. In subgroup analysis, this age-of-onset shift was particularly marked for children with frequent wheeze. Ponsonby et al Epidemiology 2003 |
