“…51 Most studies used sleep questionnaires, for example Basic Nordic Sleep Questionnaire, Sleep Disturbance Scale for Children, Pediatric Sleep Questionnaire (PSQ), STOP-BANG questionnaire, Epworth sleepiness scale (ESS) and/or Berlin Questionnaire (BQ) to screen for SDB symptoms. 18,32,[50][51][52][53][59][60][61] Many studies state that PSG is the 'gold standard' for diagnostic of SDB, but emphasise that it is costly, technique-sensitive and unavailable in municipal dental health care because it is used at hospitals. 6,16,18,50,51,53,59,60 Sleep questionnaires are easier to perform as a screening tool for SDB symptoms, but the reliability of detecting SDB is low in comparison with PSG or PG.…”