Normal Variability of Tidal Breathing Flow-volume Curves During Sleep in Healthy Children

Exclusion Criteria

• •Preterm birth
• •Recurrent bronchitis or recurrent hospitalizations because of a respiratory illness
• •Nasal congestion, adenotonsillar hypertrophy, signs and symptoms of sleep apnea or sleep disordered breathing
• •Acute respiratory infection or hospitalization because of an acute illness within 4 weeks prior to inclusion
• •Personal or family history of asthma
• •Recurrent wheezing without respiratory infection
• •Allergic rhinitis, chronic rhinosinusitis, or other chronic respiratory disorders
• •Atopic dermatitis
• •Diagnosed allergic sensitization
• •Use of asthma rescue or maintenance medication within 4 weeks prior to inclusion
• •Any major chronic illness as judged by the investigators
• •Implanted or external active medical devices such as pacemakers