ABSTRACT
correlation with cross-sectional area and negative correlation with bucking ratio. The effect of fat mass on hip geometric parameters at the three regions was inconsistent. (3) Fat mass and percentage of body fat ( Fat%) showed negative correlation with cross-sectional area and average cortical thickness and positive correlation with bucking ratio in young group. However, the negative contribution produced by fat mass and Fat% to hip geometric structure became weaker gradually in middle-aged and older groups. ( 4 ) Limb lean mass yielded the largest positive contribution to cross-sectional area and average cortical thickness at all three regions in young group. However, the contribution produced by trunk lean mass became the largest positive contribution to cross-sectional area and average cortical thickness in older group. Conclusions Among all the body composition parameters, hip BMD has showed the most marked correlation with hip geometric structure. Lean mass is ranked the second in the correlation. The impacts of fat mass and lean mass on hip geometry are changing with aging and their different tissue distributions.
ABSTRACT
Objective To investigate bone health conditions in 1637 aged women. Methods From May 2004 to October 2008, Bone mineral density (BMD) of 1637 women at age of more than 60 years old were measured by Hologic DephiA dual energy X-ray absorptiometry (DXEA) in Huadong hospital affiliated to Fudan University. All data were compared and analyzed among each group which will be divided by every ten years. Those women were divided into groups on 10 years range. BMD of lumbar vertebral and hip bone,fracture incidence and bone turnover marker were compared and analyzed. Results (1) BMD: at age of 3=90, 80 - 89, 70 - 79, 60 - 69, BMD of the lumbar vertebral 2 - 4(L2-4) values were (0. 96 ± 0. 18),(0. 90 ± 0. 20) , (0. 81 ± 0. 16) , (0. 83 ± 0. 14) g/cm2 , respectively. There were significantly increased BMD of lumbar of women at the age of 80 - 89 and ≥90 year-old compared with those of 60 - 69 year-old (P<0. 05). At age of ≥90,80 -89,70-79,60 -69 BMD of femur neck, Total, Torch, Ward's trianger were(0. 60 ±0. 11) , (0. 65 ±0. 11) ,(0. 47 ±0. 09) ,(0. 37 ±0. 09) g/cm2; at age of 80 -89 BMD of FN,Total, Torch, Ward's trianger were(0. 57 ±0. 10) , (0. 68 ±0. 13) , (0. 48 ±0. 11) , (0. 35 ±0. 10) g/cm2;at age of 70-79 BMD of FN, Total, Torch, Ward's trianger were (0.57±0. 10) ,(0. 69 ±0. 12), (0.49± 0. 10) , (0. 36 ± 0. 11) g/cm2; at age of 60 - 69 BMD of FN, Total, Torch, Ward's trianger were (0. 63 ± 0. 10) , (0. 76 ±0. 12) , (0. 54 ±0. 10), (0. 45 ±0. 15) g/cm2; There were significantly decreased in BMD of hip at the age of 70 - 79, 80 - 89,≥90 year-old compared with those of 60 - 69 year-old (P < 0. 05).(2) Fracture incidence: one time fracture incidence at age of 60 - 69,70 - 79,80 - 89, ≥ 90 were 34. 8 % (242/695) ,45. 0% (296/658) ,51. 3% (137/267) ,5/17. There were increasing trend of fracture in aged women. (3) Bone turnover marker of bone Gla protein (BGP) N-mid(N-midBGP) in serum and C-terminal telopeptide of type Ⅰ collagen/Cr (CTX/Cr) in urine values were (17 ±5) μg/L, (106 ±56) μg/mmol at age of more than 90 years ,(17 ±7) (μg/L,(128 ±99)μg/mmol at age of 80-89 years,(21 ± 14) μg/L,(182 ± 173)μg/mmol at age of 70-79 years, (25±13)μg/L, (190 ± 168)μg/mmol at age of 60 - 69 years. There were significant decreased trends of N-midBGP at age of 70 -79,80 -89 compared with that of 60-year (P < 0. 05). There were significant decreased trends of CTX/Cr 80 - 89 compared with that of 60-year (P < 0. 05). Conclusions There were significant decreased bone metabolism in aged women. The risk of hip fracture is significantly increased in aged women. Diagnosis of osteoporosis based on BMD of hip in aged women is more reliable.