Muscle-Bone Interactions in Chinese Men and Women Aged 18–35 Years

Table 4

pQCT bone quantity and quality (mean ± SD).

Variable	Female (n = 25)		Male (n = 28)
	Younger (n = 15)	Older (n = 10)	Younger (n = 15)	Older (n = 13)
TIBIA 4% site
Total vBMD (mg/cm^3)	299 ± 37^b	286 ± 57^b	341 ± 31^a	343 ± 41^a
Trabecular vBMD (mg/cm^3)	252 ± 37^b	233 ± 59^b	297 ± 28^a	288 ± 31^a
Total BSI (mg^2/mm^4)	89 ± 29^b	88 ± 36^b	144 ± 26^a	143 ± 26^a
Trabecular BSI (mg^2/mm^4)	52.5 ± 21.5^b	48.1 ± 32.9^b	89.7 ± 17.6^a	81.6 ± 13.6^a
TIBIA 38% site
Total vBMD (mg/cm^3)	880 ± 61	898 ± 52	905 ± 61	903 ± 81
Cortical vBMD (mg/cm^3)	1184 ± 19	1201 ± 17	1189 ± 19	1190 ± 23
Cortical SSI (mm^3)	1583 ± 369^b	1534 ± 396^b	1669 ± 510^a	2012 ± 641^a
TIBIA 66% site
Total vBMD (mg/cm^3)	671 ± 66	671 ± 58	698 ± 67	635 ± 75
Cortical vBMD (mg/cm^3)	1142 ± 20^b	1169 ± 12^a	1151 ± 21^b	1148 ± 13^a
Cortical SSI (mm^3)	2451 ± 642	2328 ± 549	2543 ± 773	2670 ± 655

vBMD: volumetric bone mineral density; pQCT: peripheral quantitative computed tomography; BSI: bone strength index; SSI: strength-strain index; SD: standard deviation; ; ; a > b; older > younger.