Effects of demographic and sleep-related factors on snoring sound parameters

To investigate the effect of frequently reported between-individual (viz., age, gender, body mass index [BMI], and apnea-hypopnea index [AHI]) and within-individual (viz., sleep stage and sleep position) snoring sound-related factors on snoring sound parameters in temporal, intensity, and frequency domains. This study included 83 adult snorers (mean ± SD age: 42.2 ± 11.3 yrs; male gender: 59%) who underwent an overnight polysomnography (PSG) and simultaneous sound recording, from which a total of 131,745 snoring events were extracted and analyzed. Data on both between-individual and within-individual factors were extracted from the participants’ PSG reports. Gender did not have any significant effect on snoring sound parameters. The fundamental frequency (FF; coefficient = −0.31; P = 0.02) and dominant frequency (DF; coefficient = −12.43; P