Obesity / Adolescent / Sleep Apnea / Humans / Child / Obstructive sleep apnea / Female / Male / Young Adult / Disease Severity / Body Mass Index / Polysomnography / Aged / Middle Aged / Body mass index (BMI) / Adult / Sex Factors / Time Factors / Morbid Obesity / Age Factors / Arnold Chiari Malformation / Oxygen saturation / Clinical evaluation / Sleep Stages / Pulmonary ventilation / Severity of Illness Index / Obstructive sleep apnea / Female / Male / Young Adult / Disease Severity / Body Mass Index / Polysomnography / Aged / Middle Aged / Body mass index (BMI) / Adult / Sex Factors / Time Factors / Morbid Obesity / Age Factors / Arnold Chiari Malformation / Oxygen saturation / Clinical evaluation / Sleep Stages / Pulmonary ventilation / Severity of Illness Index