Asthma severity scoring:
Asthma was divided into grades I–IV (I being the mildest and IV the most severe). Grading was based on events that occurred over the past six months; including day and night symptoms, effect of asthma on daily activity, use of steroids, and peak expiratory flow rate as defined byGINA guidelines 2020. Pulmonary function tests were performed for all patients using a fully computerized Spirometer (Jaeger MasterScreen™ IOS, version 5.2 manufactured by VIASYS Healthcare GmbH, Hoechberg, Germany) Pulmonary functions were assessed using forced expiratory volume in 1 second (FEV1), forced vital capacity (FVC) and the FEV1/FVC ratio, measured and expressed as a percentage of predicted values with a ratio higher than 0.8 being normal.