chronic respiratory symptom and signs such as cough ,breathlessness , wheeze ; forced expiratory volume in one second(FEV1)of predicted (FEV1%) less than 80 % ; the ratio of FEV1 to forced vital capacity (FVC , FEV1/ FVC)\<70 % ; FEV1reversibility after inhalation of 200g salbutamol (bronchodilator) of less than 12 % of prebronchodilator FEV1.
You may not be if
Coexistence of asthma and COPD or with earlier history of bronchial asthma as well as patients who have never smoked were excluded from the study.
