Association of quantitative heel ultrasound with history of osteoporotic fractures in elderly men: The ESOPO study

In order to evaluate the usefulness of calcaneal quantitative ultrasound (QUS) in the assessment of male osteoporosis, a cross-sectional, population-based study was performed. A cohort of 4,832 men, randomly selected, community-dwelling, aged 60–80 years and representative of the general older male Italian population was recruited. QUS measurements were assessed in 83 centers distributed all over Italy and equipped with an Achilles device (GE-Lunar, Madison, Wisconsin, USA). All participants were administered a questionnaire covering lifestyle variables and medical history. Low-energy fractures that had occurred since age 50 were recorded. Overall, 43 subjects reported a previous hip fracture and 455 subjects reported other non-spinal fractures. Univariate analysis showed that fractured subjects were older, with a lower level of outdoor physical activity and a more frequent history of prolonged bedridden periods in comparison with unfractured subjects. Men reporting non-spinal fractures showed a higher prevalence of smoking, while no difference was found among groups in anthropometric measures and calcium intake. QUS measurements showed that all QUS parameters were significantly lower in both fracture groups ( p <0.001). Multiple logistic regression analysis demonstrated that each SD reduction in QUS measures was associated with an approximate doubling of the risk for hip fracture, independent of age and other clinical variables (broadband ultrasound attenuation [BUA]: odds ratio [OR]=2.24; 95% confidence interval [CI] 1.61–3.08; stiffness index: OR=2.19; CI 1.56–3.11; speed of sound [SOS]: OR=1.71; CI 1.18–3.24) and with an increase of the risk of other non-spinal fractures (BUA: 1.38; CI 1.22–1.59; stiffness index: OR=1.27; CI 1.17–1.38; SOS: OR=1.14; CI 0.96–1.40). It can be concluded that calcaneal QUS measurement is associated with the risk for hip fracture and any non-spinal fractures among a community-dwelling cohort of elderly men. The strength of the association between QUS measurement and fracture is similar to that observed in elderly women.     

Characteristics of calcaneus quantitative ultrasound normative data in Chinese mainland men and women

Introduction Quantitative ultrasound (QUS) assessment at the calcaneus, as a safe and reliable method for evaluating skeletal status, is rapidly gaining in popularity. Assessment by QUS provides three parameters of skeletal status: broadband ultrasound attenuation (BUA), speed of sound (SOS) and derived data-stiffness index (STI). The objective of the present study was firstly to determine the normative QUS data on healthy Chinese mainland men and women and secondly to investigate the effects of sex, age and body size on these three QUS parameters.Methods A study cohort consisting of 725 healthy Chinese women and 568 men aged 10–83 years participated in this investigation. The three QUS parameters all exhibited a characteristic mild rise-then-fall pattern with increasing age in both sexes. Younger men and women had similar QUS values, while older women had lower values than older men. Age-related differences were more pronounced among females. Pearson’s correlation and regression analysis showed that weight was a major determinant of QUS in both sexes, along with age.Results There were some discrepancies between our data and results from other populations, even when the same type of QUS instrument was used, probably as a result of various factors, including ethnic, life-style environment and diet, among others.Conclusions These normative data will be useful for comparing the results of individual studies, predicting fracture risk of Chinese men and women and determining diagnostic criteria of osteoporosis by QUS.     

高强度体力劳动者跟骨定量超声测定结果的分析研究

目的 测定高强度体力劳动者(建筑工人)和脑力劳动者(中学教师)跟骨定量超声参数,分析评价体力劳动强度对骨量变化的影响。方法 采用UBIS3000型定量超声仪,对兰州市区217名建筑工人和183名中学教师(男,年龄20-49岁)跟骨定量超声参数进行测定。结果 建筑工人跟骨超声振幅衰减(BUA)和刚度(STT)在20-49岁呈递增趋势,超声声速(SOS)递减,但无统计学差异。教师的三项数据峰值都在30-39岁,各年龄组均低于建筑工人组。结论 跟骨三项指标随年龄增长改变,体力劳动的强度对骨量变化有重要影响,强体力劳动者骨质量优于脑力劳动者,提示运动有助于保持骨量,预防骨质疏松的发生。     

Teriparatide’s effects on quantitative ultrasound parameters and bone density in women with established osteoporosis

This study aimed to evaluate the effects of teriparatide [hPTH (1–34)] on quantitative ultrasound (QUS) parameters and bone mineral density (BMD) at the axial and appendicular (hand) skeleton in women with established osteoporosis who had been previously treated with antiresorptive drugs. Sixty postmenopausal women (age 71.1±6.8 years) were randomly assigned to either receive once-daily 20-μg subcutaneous teriparatide (n=30) or continue the antiresorptive treatment (n=30). At baseline and at 2-month intervals we measured QUS parameters at the calcaneus using the Achilles Plus (GE, Lunar), measuring speed of sound (SOS), broadband ultrasound attenuation (BUA), and stiffness index; QUS parameters at the phalanxes using the Bone Profiler (IGEA), measuring amplitude-dependent speed of sound (AD-SoS), bone transmission time (BTT), and fast wave amplitude (FWA); and BMD values at the right hand using dual x-ray absorptiometry. BMD at the lumbar spine, femur, and whole body were measured on a 6-monthly basis. After 1 year of teriparatide treatment, the changes in BMD were 7.1% at the lumbar spine, 2.6% at the femoral neck, −0.8% at the total hip, and −0.6% for the whole body. Teriparatide induced a significant and persistent decrease in BMD at the hand (−3.6% at month 6 and −2.7% at month 12). In the teriparatide group at month 12, AD-SoS was slightly increased (0.7%; not significant), whereas BTT significantly decreased (−16.4%, p<0.001) and FWA significantly increased (17.5%, p<0.001). The FWA/BTT ratio increased by 26.6% and 32.9% at months 6 and 12, respectively, in the teriparatide group and remained unchanged in the antiresorptive group. In women with established osteoporosis who had previously been treated with various antiresorptive drugs, 1 year of teriparatide treatment determined the expected increase in BMD at the axial skeleton and a significant and prolonged decrease in BMD at the hand. Moreover, teriparatide determined important changes in BTT and FWA, two parameters obtained from the analysis of ultrasonographic trace at the phalanxes, which could be considered in monitoring for the early effect of teriparatide on bone.     

重庆市区中老年人跟骨定量超声测定分析

目的通过对重庆市区中老年人进行跟骨定量超声测定,分析重庆市区中老年人骨质疏松现状,为该病的防治提供依据和借鉴。方法采用SONOST2000型定量超声仪对855例中老年人右跟骨宽波段超声衰减(BUA)、超声速度(SOS)、骨量指数(BQI)、T值(T-Score)进行检测。结果受检中老年人群骨质疏松发生率约为41．1％,其中女性(58．4％)明显高于男性(33．9％, P<0．01);随着年龄增长,骨质疏松发生率明显增高(P=0．001);女性各项跟骨定量超声测定参数均显著低于老年男性(P<0．01);各项参数随年龄增长而显著减低(BUA:P=0．04,其余P< 0．01)。结论增龄和女性是老年人骨质疏松的重要危险因素,跟骨定量超声检测可以作为骨质疏松人群防治的有效筛选手段。     

Contralateral differences in quantitative ultrasound of the heel: the importance of side in clinical practice

Quantitative ultrasound (QUS) of the heel is becoming increasingly popular for the assessment of skeletal status, although there appears to be a general lack of agreement regarding which side to measure. The purpose of the present study was to evaluate possible side differences (right versus left) in heel QUS within the general population, including children (10–15 years old, n=406), adults (26–33 years old, n=339), and elderly subjects (60–75 years old, n=455) of both genders (818 females and 382 males), and to examine the impact of these differences on prevalence estimates of osteoporosis and individual fracture risk assessment. All participants had both their heels measured twice with the Sahara device, which measures broadband ultrasound attenuation (BUA) and speed of sound (SOS) through the os calcis; a composite parameter, that is, quantitative ultrasound index (QUI) and an estimate of heel BMD (eBMD) were also derived. Significant side differences were detected for BUA and SOS (P<0.05), but not for QUI or eBMD. Contralateral differences were rather small in absolute terms, but were in the order of 12.6% for BUA, 0.72% for SOS, 7.9% for QUI, and 9.9% for eBMD, when expressed as percentage of the mean values for the two heels. Bilateral differences appeared to vary across age and gender. Significant correlations between QUS indices of the right and left heel were observed (r=0.75–0.85; P<0.001), which seemed to be stronger among the elderly and among male individuals. Prevalence rates of osteopenia and osteoporosis were not significantly different when estimated from eBMD T-scores for the one or the other foot (²=1.781, df=2, P=0.410). However, cross-classification analysis revealed that only 84% of the subjects classified into each risk category by the two calcanei were actually the same persons. In conclusion, results from the present study strongly suggest that QUS measurements of opposite heels may not be equivalent with respect to the evaluation of bone status and classification of individual fracture risk assessment, although the degree of discrepancy appears to be related to the primary outcome of interest.     

高原藏族居民跟骨定量超声测定分析

[目的]测定生活在海拔3000m高原的藏族居民的跟骨定量超声参数，了解藏族的骨量变化规律和高原环境对其的影响。[方法]采用UBIS3000型定量超声仪，对夏河县596名藏族居民跟骨定量超声参数进行测定。[结果]超声振幅衰减（BUA）、刚度（STI）、超声声速（SOS）的峰值男性为30～39岁，女性为40-49岁，达到峰值后男女性随年龄增长各项指标快速下降，绝经后女性最为明显。[结论]高原藏族居民峰值骨量高，老年后骨量丢失迅速，发生骨质疏松的危险性增加。     

Broadband ultrasound attenuation (BUA) of the heel bone and its correlates in men and women in the EPIC-Norfolk cohort: a cross-sectional population-based study

Osteoporotic fractures have substantial clinical and public health impact. Bone quality is an important determinant of fracture risk. Quantitative ultrasound (QUS) of bone measured as broadband ultrasound attenuation (BUA) has been shown to predict fracture risk. However, there have been very few large population studies, particularly in men. We investigated the correlates of calcaneal BUA using a CUBA clinical machine in 15,668 middle and older aged men and women (42–82 years) from the UK, EPIC-Norfolk cohort. At all ages mean BUA was significantly greater in men than women (men, 90.1±17.6; women 72.1±16.5). The age-related decline in BUA was five times greater in women than men (–0.77 vs. –0.15 dB/MHz per year). Pre- and post-menopausal bone loss was 0.39 and 0.85 dB/MHz per year, respectively. In univariate regression BUA increased with weight and height by 0.45 dB/MHz per kg and 0.68 per cm in women and 0.24 dB/MHz per kg and 0.33 per cm in men. BUA increased with body mass index (BMI) by 0.84 dB/MHz per kg/m² in women and 0.55 in men. However, weight was twice as influential as height in men and seven times as great in women. Age, weight and height explained 27% of the variance of BUA in women, but only 3% in men. Adjusted BUA was significantly lower in men and women with an existing history of any hip, wrist or spinal fracture both overall and when analysed for specific site. Figures were: all fractures 66.8 vs. 72.5 dB/MHz (P<0.001), women; 84.1 vs. 90.5 (P<0.001), men; hip fractures 61.9 vs. 72.2 dB/MHz (P<0.001), women; 81.5 vs. 90.2 (P<0.001), men; wrist fractures 66.6 vs. 72.5 dB/MHz (P<0.001), women; 81.5 vs. 90.2 (P<0.001), men; spinal fractures 68.1 vs. 72.1 dB/MHz (P<0.01), women; 85.1 vs. 90.2 (P<0.01), men. These differences equate to reductions of 14, 9 and 6% and 10, 7 and 6% for fractures of the hip, wrist and spine in the BUA of women and men, respectively. Thus, despite the overall gender difference in BUA the relative magnitude of a previous history of fracture was equally important in both men and women. Adjusted BUA was also lower in those with previous history of osteoporosis. In women currently taking hormone replacement therapy (HRT) the adjusted BUA was 5 dB/MHz or one-third of an SD greater than in those who did not. The BUA of those with a current smoking habit was 1.7% lower in women and 3.2% lower in men. Overall, there are substantial sex differences in the relationship of the physical and osteoporotic risk factors associated with BUA. A better understanding of these determinants of heel ultrasound may provide insights into how some of the sex differences in bone health can be explained and bone loss in later life minimised.     

健康和骨质疏松女性胫骨定量超声及骨折阈值的价值

目的 用太原地区健康女性胫骨定量超声骨量（ＱＵＳ）的健康参考值,探讨诊断骨质疏松症的诊断标准及骨折阈值。方法 对太原地区的健康女性１７３６例（９￣８３岁）和骨质疏松女性１８７例（４２￣８０岁）;其中骨折患６７例,测定胫骨定量超声骨量值。结果 健康女性３０岁以前胫骨ＳＯＳ值年龄的增加而升高;３０￣４０岁达到峰值,４０岁以后胫骨ＳＯＳ值开始下降;绝经后胫骨ＳＯＳ值明显降低,与绝经时间呈负相关（ｒ＝０     

Effect of combined administration of vitamin D3 and vitamin K2 on bone mineral density of the lumbar spine in postmenopausal women with osteoporosis

The effect of the combined administration of vitamin D₃ and vitamin K₂ on bone mineral density (BMD) of the lumbar spine was examined in postmenopausal women with osteoporosis. Ninety-two osteoporotic women who were more than 5 years after menopause, aged 55–81 years, were randomly divided into four administration groups: vitamin D₃ (1α hydroxyvitamin D₃, 0.75 μg/day) (D group; n = 29), vitamin K₂ (menatetrenone, 45 mg/day) (K group; n = 22), vitamin D₃ plus vitamin K₂ (DK group, n = 21), and calcium (calcium lactate, 2 g/day) (C group; n = 20). BMD of the lumbar spine (L2–L4) was measured by dual energy X-ray absorptiometry at 0, 1, and 2 years after the treatment started. There were no significant differences in age, body mass index, years since menopause, and initial BMD among the four groups. One-way analysis of variance (ANOVA) with repeated measurements showed a significant decrease in BMD in the C group (P < 0.001). Two-way ANOVA with repeated measurements showed a significant increase in BMD in the D and K groups compared with that in the C group (P < 0.05 and P < 0.001, respectively), and a significant increase in BMD in the DK group compared with that in the C, D, and K groups (P < 0.0001, P < 0.05 and P < 0.01, respectively). These findings indicate that combined administration of vitamin D₃ and vitamin K₂, compared with calcium administration, appears to be useful in increasing the BMD of the lumbar spine in postmenopausal women with osteoporosis. Received: January 13, 2000 / Accepted: June 5, 2000     

定量超声检测技术对骨质疏松症诊断价值的Meta分析

目的应用Meta分析法综合评价定量超声检测技术(QUS)对骨质疏松症的诊断价值。方法检索PubMed、Medline、中文科技期刊全文数据库(VIP)、中国期刊全文数据库(CNKI)和万方等数据库,检索时间为各数据库自建库起至2011年9月发表的相关文献,收集关于QUS检测技术诊断骨质疏松症的相关文献并进行信息统计和文献质量评估;采用Meta-Disc 1.4软件随机效应模型进行数据分析,计算合并敏感度、特异度、似然比及合并受试者工作特征曲线等指标。结果共纳入5篇文章,其中英文1篇,中文4篇,共844名研究对象,其中经双能X线金标准诊断的骨质疏松患者284例,非患者560例。异质性检验显示纳入研究存在异质性,通过随机效应模型计算合并敏感度为0.46(95%C.I.:0.42～0.51),合并特异度为0.73(95%C.I.:0.70～0.75),合并阳性似然比为2.43(95%C.I.:1.42～4.13),合并阴性似然比为0.66(95%C.I.:0.48～0.90),合并受试者工作特征曲线下面积为0.74。结论 QUS检测技术对骨质疏松症诊断能力尚可,但尚不能认为其具有较高的准确性,应进一步规范QUS检测方法,寻求适合中国人骨质疏松症QUS诊断阈值及检测部位,及通过更多高质量、大样本相关研究对结果进一步验证。     

Role of quantitative ultrasound to predict fracture among institutionalised older people with a history of fracture

Summary  The fracture predictive value of quantitative ultrasound (QUS) may be modified by previous fracture status. Non-significant associations between QUS parameters and fracture risk were observed among frail older people with a history of fracture. These findings suggest that QUS measurements for frail older people might be more useful in those without a fracture history. Introduction  Quantitative ultrasound has been shown to predict risk of fracture in various populations. However, this ability may be modified by the presence of previous fracture in very frail older people. Methods  We assessed bone strength by QUS and clinical risk factors at baseline for 1,982 institutionalised older people. Fractures were ascertained for 2 years from baseline and validated by X-ray reports. Results  Study participants were very old (mean age = 85.7 ± 7.1 years) and frail (70% using walking aids). Forty-five percent reported a history of fracture. During a mean follow-up period of 1.64 years, 335 participants suffered a fracture or fractures. Fracture rates were significantly higher in participants with a history of fracture compared with those without a history of fracture (16.0 vs 9.2 per 100 person years, p < 0.001). Significant associations between fracture risk and QUS parameters (broadband ultrasound attenuation and velocity of sound) were observed among participants without a history of fracture (both p < 0.01), but not among those who had a fracture history (both p ≥ 0.7). Conclusions  In very frail older people, QUS measurements may be more useful for assessing fracture risk in those without a history of fracture after age 50.     

No effect of vitamin K1 intake on bone mineral density and fracture risk in perimenopausal women

Introduction Vitamin K functions as a co-factor in the post-translational carboxylation of several bone proteins, including osteocalcin.Aim The aim of this study was to investigate the relationship between vitamin K₁ intake and bone mineral density (BMD) and fracture risk in a perimenopausal Danish population.Design The study was performed within the Danish Osteoporosis Prevention Study (DOPS), including a population-based cohort of 2,016 perimenopausal women. During the study approximately 50% of the women received hormone replacement therapy (HRT). Associations between vitamin K₁ intake and BMD were assessed at baseline and after 5-years of follow-up (cross-sectional design). Moreover, associations between vitamin K₁ intake and 5-year and 10-year changes in BMD were studied (follow-up design). Finally, fracture risk was assessed in relation to vitamin K₁ intake (nested case–control design).Results In our cohort, dietary vitamin K₁ intake (60 μg/day) was close to the daily intake recommended by the Food and Agriculture Organization (FAO). Cross-sectional and longitudinal analyses showed no associations between intake of vitamin K₁ and BMD of the femoral neck or lumbar spine. Neither did BMD differ between those 5% that had the highest vitamin K₁ intake and those 5% that had the lowest. During the 10-years of follow-up, 360 subjects sustained a fracture (cases). In a comparison between the cases and 1,440 controls, logistic regression analyses revealed no difference in vitamin K₁ intake between cases and controls.Conclusion In a group of perimenopausal and early postmenopausal women, vitamin K₁ intake was not associated with effects on BMD or fracture risk.     

Combining clinical factors and quantitative ultrasound improves the detection of women both at low and high risk for hip fracture

Summary We hypothesized that combining clinical risk factors (CRF) with the heel stiffness index (SI) measured via quantitative ultrasound (QUS) would improve the detection of women both at low and high risk for hip fracture. Categorizing women by risk score improved the specificity of detection to 42.4%, versus 33.8% using CRF alone and 38.4% using the SI alone. This combined CRF-SI score could be used wherever and whenever DXA is not readily accessible. Introduction and hypothesis Several strategies have been proposed to identify women at high risk for osteoporosis-related fractures; we wanted to investigate whether combining clinical risk factors (CRF) and heel QUS parameters could provide a more accurate tool to identify women at both low and high risk for hip fracture than either CRF or QUS alone. Methods We pooled two Caucasian cohorts, EPIDOS and SEMOF, into a large database named “EPISEM”, in which 12,064 women, 70 to 100 years old, were analyzed. Amongst all the CRF available in EPISEM, we used only the ones which were statistically significant in a Cox multivariate model. Then, we constructed a risk score, by combining the QUS-derived heel stiffness index (SI) and the following seven CRF: patient age, body mass index (BMI), fracture history, fall history, diabetes history, chair-test results, and past estrogen treatment. Results Using the composite SI-CRF score, 42% of the women who did not report a hip fracture were found to be at low risk at baseline, and 57% of those who subsequently sustained a fracture were at high risk. Using the SI alone, corresponding percentages were 38% and 52%; using CRF alone, 34% and 53%. The number of subjects in the intermediate group was reduced from 5,400 (including 112 hip fractures) and 5,032 (including 111 hip fractures) to 4549 (including 100 including fractures) for the CRF and QUS alone versus the combination score. Conclusions Combining clinical risk factors to heel bone ultrasound appears to correctly identify more women at low risk for hip fracture than either the stiffness index or the CRF alone; it improves the detection of women both at low and high risk.     

Dietary vitamin K intake is associated with bone quantitative ultrasound measurements but not with bone peripheral biochemical markers in elderly men and women

BackgroundVitamin K may have a protective role against bone loss and osteoporotic fractures associated to aging, although data in humans are inconsistent and the mechanisms involved are still unknown. The main objective of the study was to assess the associations between vitamin K intake, bone density, bone structure quality and biochemical bone metabolism markers in elderly subjects. We also analyzed the relationship between changes in vitamin K intake and the evolution of bone quality markers after two years of follow-up.MethodsCross-sectional analysis was carried out on 365 elderly subjects, 200 of whom were also included in a 2-year longitudinal follow-up study. Usual dietary intakes were assessed using a semi-quantitative 137-item food frequency questionnaire (FFQ). Vitamin K intake was estimated using the USDA database. Bone biochemical markers were measured in a subset of 125 subjects. Quantitative ultrasound assessment (QUS) was performed at the calcaneus to estimate bone mineral density (BMD), speed of sound (SOS), broadband ultrasound attenuation (BUA) and the quantitative ultrasound index (QUI).ResultsDietary intake of vitamin K was significantly associated with higher BMD and better QUS. No significant associations were found between vitamin K intake and bone biochemical markers. Those subjects who increased their vitamin K intake showed a lower loss of BMD, a lower decrease in SOS and a nonsignificant increase in BUA.ConclusionsHigh dietary vitamin K intake was associated with superior bone properties. Moreover, an increase in dietary vitamin K was significantly related to lower losses of bone mineral density and smaller increases in the porosity and elasticity attributed to aging, which helps to explain the previously described protective effect of vitamin K intake against osteoporotic fractures.     

Heel bone ultrasound predicts non-spine fracture in Japanese men and women

A number of prospective studies in the USA and Europe have demonstrated that quantitative ultrasound (QUS) measurements predict fracture risk. To our knowledge, there has been no such study in a Japanese population, and very few studies have measured the prognostic value of QUS measurements among men, even in the USA and Europe. We performed a three-center prospective study to investigate the relationship between baseline heel QUS measurements and non-spine fracture risk. There were 4,028 subjects (1,004 men and 3,024 women), 67.5±8.9 years [mean ± standard deviation (SD)] of age), who underwent heel QUS (Achilles device) at three centers between 1993 and 2000. In 2002, the subjects were mailed a standardized questionnaire that asked about their history of fracture. The mean follow-up period was approximately 5 years. The Achilles measured speed of sound (SOS) and broadband ultrasound attenuation (BUA). We used Cox regression analysis to determine the hazard ratio (HR), using weighted coefficients. SOS, BUA, and stiffness index (SI) predicted self-reported hip, wrist, and total non-spine fractures. After we had adjusted for age, gender, and weight, the HRs of total non-spine fracture were 1.54 [95% confidence interval (CI) 1.39–1.69], 1.53 (1.37–1.70), and 1.80 (1.62–1.98) for 1 SD decrease in SOS, BUA, and SI, respectively. In men, SOS and SI also predicted total non-spine fractures with HRs similar to those in women. The HR of prediction for hip fracture by SOS and SI was better in the short term than in the long term, and the prediction for hip, wrist, and non-spine fracture remained significant between 5 to 10 years of follow-up. Measurements obtained from heel QUS predicted non-spine fracture in Japanese men and women, and the HRs of Japanese of both genders was similar to the risk ratio (RR) of Caucasian men and women. QUS parameters can predict hip, wrist, and non-spine fracture up to 10 years.     

The epidemiology of quantitative ultrasound: A review of the relationships with bone mass, osteoporosis and fracture risk

Quantitative ultrasound (QUS) is a simple, inexpensive and non-invasive measure of bone which has been used in research settings for the prediction of osteoporosis. This review summarizes the current status of the epidemiology of QUS analysis, including its relationship with bone mineral density (BMD), risk of osteoporotic fracture and risk factors for osteoporosis. Although only moderately correlated with BMD, QUS appears to be as strong a predictor of osteoporotic fracture as BMD and may predict fracture independent of BMD. Risk factors for low QUS, including age, menopause, body composition and physical inactivity, seem to parallel those of low BMD. More longitudinal research is needed to confirm the clinical utility of QUS and more experimental and population-based studies are needed to determine whether the etiology of low QUS values is different from that of low bone mass.     

Screening with ultrasound of the heel may contribute to the prevention in osteoporosis

<正> Objective:To calibrate a Quantitative Ultrasonography(QUS)system against densitometryby defining the sensitivity and specificity of the method,and to propose a series of QUS interpre-tation thresholds to classify the individual risk with regards to the risk of developing osteoporosisin later life.Methods:Subjects were recruited in New York City over a 1-year period.Women with amen-orrhea for at least 12 months were defined as postmenopausal,and all other women as premeno-pausal.Bone mineral density(BMD)was measured with a dual energy X-ray absorptiometer(DXA)and QUS performed with the calcaneus of broadband ultrasound attenuation(BUA)andspeed of sound(SOS)using the Lunar Achilles system.Statistical analysis was performed usingSPSS software Version 10.0.Results:Two hundred twenty-eight premenopausal and menopausal women were recruited.Most of the participants were Hispanic,Caucasian and African-American in this study.All thesubjects had DXA and QUS examined and T-score was got from both.The statistical resultsshowed that the T-score of QUS has a significant relationship with that of DXA(spine:r=0.557,P<0.0001;femur:r=0.611,P<0.0001).Both QUS and DXA T-score has a significant andnegative relationship with age(QUS:r=-0.241,P<0.0001;Spine:r=-0.277,P<0.0001;femur:-0.296,P<0.0001).When T-score of heel ultrasound -1.5 was set as the interpreta-tion threshold,the osteoporosis patients with T-score of DXA-femur scan(100%)and DXA-spine(77.10%)less than -2.5 were detected.As well,the specificities of T-score -1.5 ofQUS for DXA-femur and DXA-spine were 67.5% and 72.8%,respectively.In addition,if we set-1.0 of T-score of QUS as the cutoff,74.80% and 79.60% of the osteopenia based on DXA ofspine and femur were identified.The specificities were 59.4% and 57.7%.Conclusions:QUS of the calcaneus may be an effective method for providing risk stratifica-tion for osteoporosis,and for the closely associated future risk for fragility-fracture.     

定量超声与双能骨密度测定在骨质疏松诊断中的应用及评价

目的观察定量超声法(QUS)在骨质疏松诊断中的意义及双能X线骨密度测定法(DEXA)在骨结构评价中的作用.方法采用Osteospace定量超声跟骨测定仪及HologicQDR4500A型双能骨密度测定仪,对40例健康体检者同时测定跟骨超声声速(SOS)、声衰减(BUA)以及全身、正位腰椎、侧位腰椎、侧位腰椎感兴趣区、股骨近端骨密度(BMD).结果BUA、SOS与大多数部位BMD相关关系显著(r=0.35～0.62,P<0.05或P<0.01);股骨近端及正位腰椎2BMD与BUA及SOS的直线回归关系显著(P<0.05).结论QUS是诊断骨质疏松和评价骨强度的良好方法.在DEXA测定部位中,股骨近端及正位腰椎2BMD有较高的评价骨结构特性价值.     

DXA测量BMD与超声测量SOS的比较

目的　本文通过对同一个人的跟骨超声声速(SOS)测量与双能X线吸收法测量腰2-4,股骨近端骨密度(BMD)的临床对比来评价超声骨密度仪测量跟骨的SOS对诊断骨质疏松症的敏感性和与DXA测量BMD的相关性。方法　对523名8～87岁健康人群同时采用DXA测量L2-4,股骨近端(Neck,Ward三角,Troch)BMD和超声骨密度仪测量左跟骨SOS值并进行相关分析。对1006名3～87岁健康人群测量左右跟骨的SOS值。结果　SOS与DXA测量BMD的骨峰值(PBM)均出现在20～39岁,SOS的PBM男性为(1542.83±27.44)m/s,女性为(1531.02±29.96)m/s。40岁以后随着年龄的增加,二者均逐渐下降。健康成人中BMD与SOS的相关系数为0.3～0.6,骨质疏松患者BMD与SOS的相关系数(r=0.16～0.39)较健康人(r=0.33～0.61)低。左右足跟SOS无显著差异,DXA的BMD与SOS诊断骨质疏松症(OP)的符合率为60%。结论　DXA测量BMD与超声SOS为中等相关。建议在单独使用超声骨密度仪测量SOS来诊断OP时,应当参照临床症状和X线的检查全面考虑,以免造成漏诊或误诊。