To examine accuracy of body composition predicted by the Multi-Frequency Bioelectric Impedance Analysis （MF-BIA） compared with the Dual-energy X-ray Absorptiometry （DXA） in adults with obese. We measured body comp...To examine accuracy of body composition predicted by the Multi-Frequency Bioelectric Impedance Analysis （MF-BIA） compared with the Dual-energy X-ray Absorptiometry （DXA） in adults with obese. We measured body composition of 749 adults with obese both by the MF-BIA and DXA. The Lin＇s concordance correlation and the Bland-Altman plots were used to examine the consistency. The concordance correlation coefficient of %BF between the MF-BIA and DXA in men and women was 0.560, and 0.669, respectively. Compared with the DXA, the MF-BIA significantly underestimated %BF by 4.33% in men （P 〈 0.001）, however overestimated %BF by 0.50% in women （P 〈 0.001）. After corrected by the correction equations established in this study, the differences were significantly decreased. Therefore, the MF-BIA （TANITA MC-180） may need to be corrected in estimating body composition for adults with obese.展开更多
目的观察骨小梁分数(trabecular bone score,TBS)在成都地区人群中的分布及变化;评估TBS用于骨质疏松症治疗监测的精确度。方法选择2022年10月至2023年7月在四川省医学科学院·四川省人民医院就诊或体检者4963例,其中女性3708人,男...目的观察骨小梁分数(trabecular bone score,TBS)在成都地区人群中的分布及变化;评估TBS用于骨质疏松症治疗监测的精确度。方法选择2022年10月至2023年7月在四川省医学科学院·四川省人民医院就诊或体检者4963例,其中女性3708人,男性1255人,均行双能X线(DXA)检查测量腰椎TBS及骨密度(bone mineral density,BMD),结果以均值±标准差(SD)表示。选取30例患者每人行两次DXA检查,计算BMD、TBS的精确度误差。结果(1)TBS在男性20~29岁、女性30~39岁时达到峰值,之后均随增龄逐渐下降;(2)男、女TBS与年龄呈负相关,与体质量指数(body mass index,BMI)呈弱正相关;TBS与L1~4BMD呈正相关;(3)低骨量组男、女TBS受损者占比分别为19.6%、35.1%;BMD正常TBS受损+部分受损者占比分别为22.9%、40.5%。L_(1~4)BMD的CV%和LSC-CV%分别为1.089%、3.015%;TBS的CV%和LSC%分别为1.429%、3.958%。结论(1)本组TBS数据为成都地区人群骨质疏松防治、骨折风险评估提供了参考依据,随增龄BMD、TBS逐渐丢失,以女性更为明显;(2)TBS有较好的精确度,可用于骨质疏松症的治疗监测。展开更多
Background The performance of computed tomography X-ray absorptiometry （CTXA） against the dual energy X-ray absorptiometry （DXA） as standard has not been studied in Chinese population. The aim of this study was to...Background The performance of computed tomography X-ray absorptiometry （CTXA） against the dual energy X-ray absorptiometry （DXA） as standard has not been studied in Chinese population. The aim of this study was to evaluate the precision of this measurement and validate the value of quantitative computed tomography （QCT） by comparing CTXA results with DXA results in an elderly Chinese population. Methods One hundred and three females of 46 to 76 years old and 49 males of 52 to 76 years old were recruited from the Prospective Urban Rural Epidemiology study. All subjects underwent hip scans by both QCT and DXA on the same day. For precision determination, 30 subjects had duplicate DXA hip scans. The hip QCT data of a subset of 27 subjects were separately analyzed by two observers and reanalyzed by one observer at a different time. The inter- and intra-observer variations of CTXA measurement were assessed, and the difference and correlation between CTXA and DXA results were analyzed. Results The inter- and intra-observer variations of CTXA were 0.070 and 0.024 g/cm^2 in the femoral neck （FN）, and 0.030 and 0.012 g/cm2 in the total hip （TH）, which were comparable to the DXA inter-scan variations （0.013 g/cm2 for FN and 0.014 g/cm2 for TH）. The results of CTXA bone mineral density （BMD） were highly correlated with those of DXA （R2 = 0.810 for FN and R2 = 0.878 for TH）. The BMD values of CTXA in FN and TH were lower than those of DXA by 21.0% and 17.8% （P〈0.05）, respectively. However, after appropriate transformation, the difference was eliminated and a comparable T score could be obtained. Conclusions CTXA shows good agreement with DXA for the measurement of BMD in the proximal femur, which makes QCT suitable for the quantification of bone mineral content in the hip and helpful for the diagnosis of osteoporosis.展开更多
近年来,我国肉类加工行业发展迅猛,自动化和智能化水平逐渐提高,多种肥瘦比例检测技术被应用到肉制品加工和屠宰行业。双能X射线吸收法(dual energy X-ray absorptiometry,DXA)是解决肉制品在线肥瘦比例检测的最佳方法之一,具有精准度...近年来,我国肉类加工行业发展迅猛,自动化和智能化水平逐渐提高,多种肥瘦比例检测技术被应用到肉制品加工和屠宰行业。双能X射线吸收法(dual energy X-ray absorptiometry,DXA)是解决肉制品在线肥瘦比例检测的最佳方法之一,具有精准度高、耗时短、可以对胴体全身进行检测的优势。本文比较当前各种肥瘦比例检测技术的特点,介绍DXA的概念、测量方式,重点探讨DXA在肥瘦比例测定中的应用和研究进展,通过对研究现状、设备类型和存在问题的分析,讨论未来该技术应用的发展方向。展开更多
目的对2010-2016年发表的有关中国人骨质疏松症流行病学研究数据进行汇总,运用Meta分析方法汇总分析中国老年人骨质疏松症患病率情况。方法检索Pub Med、EMbase、Web of Science、Ovid、万方数据、中国知网及VIP中的英文和中文文献,提...目的对2010-2016年发表的有关中国人骨质疏松症流行病学研究数据进行汇总,运用Meta分析方法汇总分析中国老年人骨质疏松症患病率情况。方法检索Pub Med、EMbase、Web of Science、Ovid、万方数据、中国知网及VIP中的英文和中文文献,提取纳入研究的特征信息。数据分析采用R3.3.0软件,检验异质性,根据异质性结果选择相应的效应模型对提取数据进行加权定量合并。结果共纳入33项研究,样本总量30526例。33项研究存在异质性,按照随机效应模型计算中国60岁以上人群骨质疏松症总体患病率为36%,其中男性为23%,女性为49%,差异有统计学意义。结论骨质疏松症是中国老年人高发疾病,开展骨质疏松宣传防治工作意义重大。展开更多
文摘To examine accuracy of body composition predicted by the Multi-Frequency Bioelectric Impedance Analysis （MF-BIA） compared with the Dual-energy X-ray Absorptiometry （DXA） in adults with obese. We measured body composition of 749 adults with obese both by the MF-BIA and DXA. The Lin＇s concordance correlation and the Bland-Altman plots were used to examine the consistency. The concordance correlation coefficient of %BF between the MF-BIA and DXA in men and women was 0.560, and 0.669, respectively. Compared with the DXA, the MF-BIA significantly underestimated %BF by 4.33% in men （P 〈 0.001）, however overestimated %BF by 0.50% in women （P 〈 0.001）. After corrected by the correction equations established in this study, the differences were significantly decreased. Therefore, the MF-BIA （TANITA MC-180） may need to be corrected in estimating body composition for adults with obese.
文摘目的观察骨小梁分数(trabecular bone score,TBS)在成都地区人群中的分布及变化;评估TBS用于骨质疏松症治疗监测的精确度。方法选择2022年10月至2023年7月在四川省医学科学院·四川省人民医院就诊或体检者4963例,其中女性3708人,男性1255人,均行双能X线(DXA)检查测量腰椎TBS及骨密度(bone mineral density,BMD),结果以均值±标准差(SD)表示。选取30例患者每人行两次DXA检查,计算BMD、TBS的精确度误差。结果(1)TBS在男性20~29岁、女性30~39岁时达到峰值,之后均随增龄逐渐下降;(2)男、女TBS与年龄呈负相关,与体质量指数(body mass index,BMI)呈弱正相关;TBS与L1~4BMD呈正相关;(3)低骨量组男、女TBS受损者占比分别为19.6%、35.1%;BMD正常TBS受损+部分受损者占比分别为22.9%、40.5%。L_(1~4)BMD的CV%和LSC-CV%分别为1.089%、3.015%;TBS的CV%和LSC%分别为1.429%、3.958%。结论(1)本组TBS数据为成都地区人群骨质疏松防治、骨折风险评估提供了参考依据,随增龄BMD、TBS逐渐丢失,以女性更为明显;(2)TBS有较好的精确度,可用于骨质疏松症的治疗监测。
文摘Background The performance of computed tomography X-ray absorptiometry （CTXA） against the dual energy X-ray absorptiometry （DXA） as standard has not been studied in Chinese population. The aim of this study was to evaluate the precision of this measurement and validate the value of quantitative computed tomography （QCT） by comparing CTXA results with DXA results in an elderly Chinese population. Methods One hundred and three females of 46 to 76 years old and 49 males of 52 to 76 years old were recruited from the Prospective Urban Rural Epidemiology study. All subjects underwent hip scans by both QCT and DXA on the same day. For precision determination, 30 subjects had duplicate DXA hip scans. The hip QCT data of a subset of 27 subjects were separately analyzed by two observers and reanalyzed by one observer at a different time. The inter- and intra-observer variations of CTXA measurement were assessed, and the difference and correlation between CTXA and DXA results were analyzed. Results The inter- and intra-observer variations of CTXA were 0.070 and 0.024 g/cm^2 in the femoral neck （FN）, and 0.030 and 0.012 g/cm2 in the total hip （TH）, which were comparable to the DXA inter-scan variations （0.013 g/cm2 for FN and 0.014 g/cm2 for TH）. The results of CTXA bone mineral density （BMD） were highly correlated with those of DXA （R2 = 0.810 for FN and R2 = 0.878 for TH）. The BMD values of CTXA in FN and TH were lower than those of DXA by 21.0% and 17.8% （P〈0.05）, respectively. However, after appropriate transformation, the difference was eliminated and a comparable T score could be obtained. Conclusions CTXA shows good agreement with DXA for the measurement of BMD in the proximal femur, which makes QCT suitable for the quantification of bone mineral content in the hip and helpful for the diagnosis of osteoporosis.
文摘近年来,我国肉类加工行业发展迅猛,自动化和智能化水平逐渐提高,多种肥瘦比例检测技术被应用到肉制品加工和屠宰行业。双能X射线吸收法(dual energy X-ray absorptiometry,DXA)是解决肉制品在线肥瘦比例检测的最佳方法之一,具有精准度高、耗时短、可以对胴体全身进行检测的优势。本文比较当前各种肥瘦比例检测技术的特点,介绍DXA的概念、测量方式,重点探讨DXA在肥瘦比例测定中的应用和研究进展,通过对研究现状、设备类型和存在问题的分析,讨论未来该技术应用的发展方向。
文摘目的对2010-2016年发表的有关中国人骨质疏松症流行病学研究数据进行汇总,运用Meta分析方法汇总分析中国老年人骨质疏松症患病率情况。方法检索Pub Med、EMbase、Web of Science、Ovid、万方数据、中国知网及VIP中的英文和中文文献,提取纳入研究的特征信息。数据分析采用R3.3.0软件,检验异质性,根据异质性结果选择相应的效应模型对提取数据进行加权定量合并。结果共纳入33项研究,样本总量30526例。33项研究存在异质性,按照随机效应模型计算中国60岁以上人群骨质疏松症总体患病率为36%,其中男性为23%,女性为49%,差异有统计学意义。结论骨质疏松症是中国老年人高发疾病,开展骨质疏松宣传防治工作意义重大。
