Objective: To study clinical presentations and complications of OSA in Thai patients.

Materials and Methods: This study was a retrospective, descriptive study conducted at OSA clinic, Srinagarind Hospital, Khon Kaen University, Khon Kaen, Thailand. The inclusion criteria were adult patients diagnosed as OSA. The diagnosis of OSA was made by evidence of apnea-hypopnea index of 5 times/hour or more by either in-laboratory or portable home sleep test. Clinical presentations and complications of OSA were studied by chart review.

Results: There were 130 patients met the study criteria. The median age and body mass index of all patients were 50 years and 29.5 kg/m². The male: female ratio was 1.1: 1.0. Snoring was the most common symptom (63.8%) followed by excessive daytime sleepiness (41.5%). The median AHI and lowest oxygen saturation were 19 times/hour and 83.5%. The top three complications were hypertension (80.8%), left ventricular hypertrophy (38.3%), and gastroesophageal reflux disease or GERD (36.9%).

Conclusions: Clinical presentations of OSA in Thai patients may not be obvious as previously reported. Hypertension, left ventricular hypertrophy, and GERD may be suggestive complications of OSA.