Prevalence of air flow obstruction (age-adjusted) by (A) lower limit of normal of forced expiratory ratio versus self-reported doctor diagnosis and (B)

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Prevalence of air flow obstruction (age-adjusted) by (A) lower limit of normal of forced expiratory ratio versus self-reported doctor diagnosis and (B) self-reported doctor diagnosis with/without current treatment. Prevalence of air flow obstruction (age-adjusted) by (A) lower limit of normal of forced expiratory ratio versus self-reported doctor diagnosis and (B) self-reported doctor diagnosis with/without current treatment. Om P Kurmi et al. BMJ Open Resp Res 2014;1:e000025 ©2014 by British Thoracic Society