“…Among the included studies, 5 were retrospective 24 , 25 , 27 , 35 , 36 and 11 were prospective controlled studies. 26 , 28 – 34 , 37 – 39 Ten studies confirmed OSA by overnight polysomnography 24 , 25 , 27 , 29 , 35 or electronic database entries, 28 , 30 , 31 , 34 , 37 3 used the STOP-Bang screening questionnaire, 33 , 38 , 39 2 identified patients by clinical diagnosis, 26 , 36 and 1 used both polysomnography and the STOP-Bang questionnaire. 32 …”