Table 3.

Pearson’s correlation coefficients for polysomnography parameters and body composition parameters.

Categorical Variable	Sleep Quality Index (events/h)
	AHI	ODI	Snoring Index	Arousal Index
Age (years)	0.11 **	0.08 **	0.06 **	0.09 **
Sex (male/female)	0.33 **	0.30 **	0.17 **	0.21 **
BMI (kg/m2)	0.57 **	0.59 **	0.4 **	0.3 **
Neck size (cm)	0.59 **	0.58 **	0.38 **	0.36 **
Waist size (cm)	0.61 **	0.61 **	0.41 **	0.35 **
Body composition
Whole body
Fat mass (kg)	0.45 **	0.47 **	0.32 **	0.23 **
Muscle mass (kg)	0.46 **	0.45 **	0.29 **	0.28 **
Visceral fat level	0.64 **	0.62 **	0.41 **	0.36 **
Bone mass (kg)	0.47 **	0.47 **	0.31 **	0.28 **
Fat-free mass (kg)	0.47 **	0.45 **	0.29 **	0.28 **
Fat percentage (%)	0.22 **	0.24 **	0.18 **	0.08 **
Muscle percentage (%)	−0.21 **	−0.23 **	−0.17 **	−0.08 **
Basal metabolic rate (kJ)	0.49 **	0.49 **	0.31 **	0.28 **
Physique rating	−0.41 **	−0.42 **	−0.3 **	−0.2 **
Limbs
Fat mass (kg)	0.42 **	0.44 **	0.3 **	0.22 **
Fat-free mass (kg)	0.48 **	0.48 **	0.3 **	0.28 **
Muscle mass (kg)	0.48 **	0.48 **	0.3 **	0.28 **
Fat percentage (%)	0.11 **	0.14 **	0.12 **	0.03
Trunk
Fat mass (kg)	0.46 **	0.47 **	0.32 **	0.23 **
Fat-free mass (kg)	0.4 **	0.38 **	0.24 **	0.25 **
Muscle mass (kg)	0.4 **	0.38 **	0.24 **	0.25 **
Fat percentage (%)	0.29 **	0.31 **	0.22 **	0.13 **
Trunk to body fat ratio (%)	0.22 **	0.19 **	0.13 **	0.12 **
Body water
TBW (kg)	0.49 **	0.48 **	0.32 **	0.29 **
ECW (kg)	0.58 **	0.56 **	0.38 **	0.34 **
ICW (kg)	0.43 **	0.43 **	0.28 **	0.26 **
Body water percent (%)	−0.24 **	−0.26 **	−0.17 **	−0.1 **
ECW to ICW ratio (%)	−0.05 *	−0.05 **	−0.03 *	−0.04 *

Abbreviations: AHI, apnea–hypopnea index; ODI, oxygen desaturation index (≥3%); BMI, body mass index; TBW, total body water; ECW, extracellular water; ICW, intracellular water. Data are expressed as coefficients. * p < 0.05; ** p < 0.01.