Asthma incidence and risk factors in a national longitudinal sample of adolescent Canadians: a prospective cohort study.

BMC Pulm Med · 2014 · PMC3975456 · PMID 24666682

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did not reach statistical significanceno p-value reported

There was suggestion that rural residence was protective for asthma compared to urban residence, however, this effect estimate did not reach statistical significance (HR = 0.58, 95% CI = 0.25-1.35).

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