The Use of Exhaled Nitric Oxide in Conjunction With the Asthma Control Test to Determine Asthma Control in Pediatric Patients

The purpose of this study is to determine if exhaled nitric oxide (eNO) levels will be increased in pediatric patients with uncontrolled asthma as determined by the Asthma Control Test (ACT). During the study the investigators will also examine if the combination of eNO and ACT will better predict asthma control that either tool alone when compared to a medical provider's assessment of the patient's asthma control.

Inclusion Criteria:

• Clinical diagnosis of asthma by pediatric pulmonologist
• Age 6-18 years

Exclusion Criteria:

• Age <6 years or >18 years
• history of bronchopulmonary dysplasia
• history of cystic fibrosis
• history of primary ciliary dyskinesia
• current acute asthma exacerbation
• current acute viral upper respiratory infection
• recent ingestion of nitrate-rich foods