Correlation coefficients between serum pentosidine concentration and bone metabolism markers.

Table 6: Correlation coefficients between serum pentosidine concentration and bone metabolism markers.

	Correlation coefficients	p-value	Adjusted R²
Age	-0.13	0.416	0.52
Body mass index	-0.26	0.032
Prolactin	-0.14	0.230
Estradiol	-0.28	0.035
Testosterone	0.16	0.167
Serum NTx	0.39	0.030
Serum total P1NP	-0.29	0.030

Linear regression analysis was performed with the serum pentosidine concentration as the dependent variable, and age, body mass index, concentration of terminal gonadotropin and bone metabolic markers as independent variables. Values of correlation coefficients indicated standardized coefficients with serum pentosidine concentration, and minus values in coefficients indicated the negative correlation. Abbreviations: NTx: Type I collagen cross-linked N-telopeptide; P1NP: N-terminal propeptine of procolla.