“…Studies followed a cross-sectional, case-control and cohort design. Most of the articles were from Brazil (35) 52 – 57 , 60 , 61 , 63 – 65 , 70 , 71 , 73 – 86 , 88 , 91 – 93 , 95 – 97 , 99 while the others were from Chile (5) 58 , 68 , 87 , 89 , 94 , Mexico (4) 66 , 67 , 90 , 100 , Peru (3) 62 , 69 , 72 and Argentina (2) 59 , 98 . The most frequently studied patients were those with Obstructive Sleep Apnea - Hypopnea Syndrome (OSAHS) (22) 53 , 54 , 58 – 62 , 64 – 69 , 74 , 75 , 79 , 81 , 86 , 87 , 90 , 94 , 97 , 98 and obesity (13) 52 , 71 , 73 , 80 , 82 – 85 , 91 , 92 , 95 , 99 , 100 ; other diseases included HIV/AIDS, sleep disorders, bronchiectasis, depression, stroke, epilepsy, hepatic and cardiovascular pathologies.…”