SRBD survey
We administered the SRBD questionnaire, a 22-item survey divided into 3
domains, nighttime, daytime and cognitive symptoms. Symptoms evaluated
include snoring, observed apneas, difficulty breathing during sleep,
daytime sleepiness, inattention/hyperactivity, enuresis, morning
headache, delayed growth and obesity 14,15. The number
of symptom-items endorsed positively (“yes”) is divided by the number
of items answered positively or negatively; resulting in a proportion
that ranges from 0.0 to 1.0. The details on the development of the SRBD
and score calculation have also been previously
published15. We used an SRBD score of 0.33 as the
screening threshold for OSA14, since this threshold
has been previously shown to offer the best OSA screening accuracy.