Table 2: Age-related serums OPG, TGF-β1, and TGF-β2 and BDR at different skeletal sites in native Chinese women.

ParameterAge (year)
35–44
( )
45–54
( )
55–64
( )
≥65
( )

OPG (pmol/L)a2.61 ± 1.88b4.76 ± 1.84c4.09 ± 1.873.77 ± 1.88
TGF-β1 (μg/L)a38.9 ± 1.64b25.2 ± 1.6325.0 ± 1.5224.9 ± 1.44
TGF-β2 (μg/L)a11.9 ± 1.32b14.2 ± 1.3314.0 ± 1.3413.6 ± 1.31
PA-BDR (%)−1.72 ± 11.3b−13.1 ± 13.8c−23.6 ± 10.8 −26.3 ± 11.4
FN-BDR (%)−3.07 ± 12.5b−10.2 ± 14.5c−21.1 ± 11.1d−27.4 ± 9.85
Hip-BDR (%) −2.34 ± 12.2b−9.96 ± 13.7c−18.6 ± 10.8d−25.0 ± 10.1
RUUD-BDR (%)−1.02 ± 9.62b−9.61 ± 13.6c−24.1 ± 10.9d −34.1 ± 10.3e

OPG: osteoprotegerin, TGF-β: transforming growth factor-beta, BDR: bone mineral density decrease rate, PA: posteroanterior spine, FN: femoral neck, Hip: total hip, and RUUD: radius + ulna ultradistal.
aValues are geometric mean ± SD.
b –0.000 compared with 45–54, 55–64 and ≥65-year age groups.
c –0.000 compared with 55–64 and ≥65-year age groups.
d –0.000 compared with ≥65-year age group.
e –0.000 compared with other sites in the same age group.