Fig. 1From: Anthropometric screening approach for obstructive sleep apnea in Japanese men: development and validation of the ABC scaleFlow diagram of study design. The study sample population comprised Japanese patients with suspected OSA who visited Yoyogi Sleep Disorders Center from November 2009 to January 2012. Patients already treated for OSA, female patients, and patients without PSG data were excluded. OSA, obstructive sleep apnea; PSG, polysomnographyBack to article page