This time separate questionnaires addressed to the child (the Pediatric Asthma Quality of Life Questionnaire) and to the child and parent together (the Asthma Control Questionnaire) were included, with a value of < 0.75 considered as being an indicator of good asthma control. Furthermore exhaled NO was measured with the help of the NIOXMINO® Airway Inflammation Monitor (Aerocrine AB, Solna, Sweden), utilizing a 10-sec expiration at a constant flow rate of 0.05 l/s. In addition, we per-formed dry-air tests (Aiolos AB, Karlstad, Sweden), in connection with which a fall in FEV1 of > 10% was considered pathological.