Establishing Reference Intervals for Bone Turnover Markers in the Healthy Shanghai Population and the Relationship with Bone Mineral Density in Postmenopausal Women

Table 2

Medians, geometric means, and 95% reference intervals for the bone turnover markers in 35–45-year-old subjects.

Measurement	Women (𝑛=406)			Men (𝑛=226)
	Median	Geometric mean	95% reference interval	Median	Geometric mean	95% reference interval
ALP (U/L)	53.00	54.80	29.55–82.04	63.00	63.87	35.52–94.16
OC (ng/mL)	13.90	15.05	4.91–22.31	16.57	18.01	5.58–28.62
P1NP (ng/mL)	32.90	35.22	13.72–58.67	42.43	44.01	16.89–65.49
𝛽-CTX (ng/mL)	0.210	0.241	0.112–0.497	0.378	0.400	0.100–0.612
25(OH)D (ng/mL)	20.58	20.98	10.97–32.15	22.89	23.55	11.11–34.43
PTH (pg/mL)	35.02	37.30	15.52–66.78	30.39	33.92	14.61–63.22

Values were obtained from 35–45-year-old healthy men and women.