Table 3.

Correlation analysis of association between polysomnographic and bone metabolic markers in OSAS patients

Items	BMI	AHI	SaO2min	BMD	PTH	β-CTX	VD	N-MID	t-P1NP
BMI	–	0.572*	−0.339*	−0.261†	0.292*	0.016	−0.168	−0.111	0.120
AHI		–	−0.673*	−0.205	0.400*	0.133	−0.404*	0.030	0.396*
SaO2min			–	0.143	−0.376*	−0.005	0.258†	0.117	−0.124
BMD				–	−0.103	−0.059	0.058	0.016	−0.084
PTH					–	0.171	−0.363*	0.081	0.270†
β-CTX						–	−0.135	0.616*	0.614*
VD							–	−0.058	−0.136
N-MID								–	0.560*
t-P1NP									–

*P<0.01; ^†P<0.05. BMI: Body mass index; AHI: Apnea-hypopnea index; SaO₂min: Minimum O₂ saturation; BMD: Bone mineral density; PTH: Parathyroid hormone; β-CTX: β-C-terminal telopeptide of type 1 collagen; VD: Vitamin D; N-MID: N-terminal midfragment of osteocalcin; t-P1NP: Total procollagen type 1 N-terminal propeptide; OSAS: Obstructive sleep apnea syndrome; –: Not applicable.