References of "Reginster, Jean-Yves"
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See detailRisedronate, a highly effective, short-term oral treatment for Paget’s disease: a dose-response study
Brown, JP; Hosking, DJ; Ste-Marie, LG et al

in Calcified Tissue International (1999), 64

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See detailFluoride for the treatment of osteoporosis
Reginster, Jean-Yves ULg

in Annals of Internal Medicine (1999), 130

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See detailIn vitro models for the study of cartilage damage and repair
Henrotin, Yves ULg; Reginster, Jean-Yves ULg

in Reginster, Jean-Yves; Pelletier, J-P; Martel-Pelletier, J (Eds.) et al Osteoarthritis: Clinical and experimental aspects (1999)

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See detailDirect costs of hip fractures in patients over 60 years of age in Belgium.
Reginster, Jean-Yves ULg; Gillet, Philippe ULg; Ben Sedrine, Wafa ULg et al

in PharmacoEconomics (1999), 15(5), 507-514

OBJECTIVE: Osteoporosis-related costs are now considered a major burden for health authorities in most developed countries. An accurate and exhaustive evaluation of these costs would be a major ... [more ▼]

OBJECTIVE: Osteoporosis-related costs are now considered a major burden for health authorities in most developed countries. An accurate and exhaustive evaluation of these costs would be a major contribution to health economic studies evaluating the efficiency of screening and prevention strategies. Osteoporosis is the most frequent underlying cause of femoral neck fractures in the elderly; these fractures weigh heavily on healthcare budgets. However, in Belgium, very few data on the financial burden of hip fractures are available and no updated estimates have been made. The goal of this paper is to estimate the direct medical expenditures associated with hip fractures in Belgium in 1996. DESIGN AND SETTING: This 1-year population-based cross-sectional study is conducted from the social security perspective. The target population in this study are men and women aged 60 years and over. PATIENTS AND PARTICIPANTS: We selected patients who had been hospitalised for a hip fracture during the year 1996 who were also affiliated with a registered social security organisation (covering 25% of the Belgian population). The sample constituted 2374 patients. INTERVENTIONS: For each of these patients, we collected an exhaustive and detailed list of healthcare resource use as well as nursing home admissions following the hip fracture event. Cost items investigated in the analysis were inpatient hospital costs and outpatient costs. Mean annual costs per case recorded in the sample were then extrapolated to the whole country on the basis of an exhaustive list of diagnoses having lead to all countrywide hospitalisations (1,700,000 hospital stays/year). MAIN OUTCOME MEASURES AND RESULTS: The mean hospital inpatient costs for hip fracture were evaluated at 332,148 Belgian francs (BeF) [$US8977] per case and BeF4,367,746,200 ($US118,047,194) for the whole country (10 million inhabitants). Patients with a hip fracture experienced an annual BeF27,825 ($US752) extra outpatient cost during the year following this fracture event, after correcting for costs related to additional comorbidity already present before the hip fracture. Finally, after a proximal femoral neck fracture, the rate of nursing home admission was higher, both for men and women at any age compared with age- and gender-matched population. CONCLUSIONS: With a total cost (acute hospital and outpatient costs) of BeF4,667,894,950 ($US126,159,323) per year in Belgium, proximal femoral neck fracture should be considered a major health economic problem and appropriate measures to prevent this disease should be rapidly undertaken. [less ▲]

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See detailEffects of Nimesulide and Sodium Diclofenac on Interleukin-6, Interleukin-8, Proteoglycans and Prostaglandin E2 Production by Human Articular Chondrocytes in Vitro
Henrotin, Yves ULg; Labasse, A. H.; Simonis, P. E. et al

in Clinical and Experimental Rheumatology (1999), 17(2), 151-60

OBJECTIVES: The aim of this study was to investigate the effects of two nonsteroidal anti-inflammatory drugs (NSAIDs), nimesulide and sodium diclofenac, on the production of proteoglycans (PG ... [more ▼]

OBJECTIVES: The aim of this study was to investigate the effects of two nonsteroidal anti-inflammatory drugs (NSAIDs), nimesulide and sodium diclofenac, on the production of proteoglycans (PG), prostaglandin E2 (PGE2) and cytokines (IL-6 and IL-8) by human articular chondrocytes in vitro. METHODS: Enzymatically isolated chondrocytes were cultured under constant agitation in a well defined culture medium. Specific radioimmunoassays were used to quantify PG and PGE2 production. Cytokine production (IL-6 and IL-8) was assayed by enzyme amplified sensitivity immunoassays (EASIAs). RESULTS: At a concentration of 3 micrograms/ml, nimesulide did not affect the PG production by chondrocytes. This concentration was superior to the highest level of nimesulide found in the synovial fluid of patients with rheumatoid arthritis 3 hours after the last oral administration of nimesulide (100 mg twice daily for 7 days). At 6 micrograms/ml a significant reduction in the PG content was obtained in the cellular phase in 5 out of the 8 cultures investigated. No similar effect was observed in the culture supernatants. Above this concentration nimesulide inhibited PG production in a dose-dependent manner. At concentrations ranging from 0.005 to 1 microgram/ml diclofenac did not significantly alter PG production. At therapeutic concentrations PGE2 production was totally inhibited by nimesulide, thus suggesting that PG inhibition is not linked to PGE2 production. Nimesulide inhibited PGE2 production by unstimulated (IC50 = 6 ng/ml) and IL-1 beta-stimulated (IC50 = 6.9 ng/ml) chondrocytes. At these concentrations, PGE2 production was fully inhibited by diclofenac. Furthermore, both nimesulide and diclofenac at therapeutic concentrations significantly decreased spontaneous and IL-1 beta-stimulated IL-6 production by human chondrocytes, but did not modify IL-8 production. CONCLUSION: From the results of this study we conclude that nimesulide and diclofenac at therapeutic concentrations are potent inhibitors of PGE2 and IL-6 production while they do not modify proteoglycan or IL-8 production. [less ▲]

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See detailEffects of Nimesulide and Indometacin on Cox-1 and Cox-2: A Comparative Study
de Leval, X.; Dogné, Jean-Michel ULg; Neven, P. et al

in Journal de Pharmacie de Belgique (1999), 54(3), 89-90

Evidence of the existence of two forms of cyclooxygenases and the clinical relevance of COX-2 inhibition led to the development of COX-2 selective NSAIDs. In order to evaluate this selectivity, we have ... [more ▼]

Evidence of the existence of two forms of cyclooxygenases and the clinical relevance of COX-2 inhibition led to the development of COX-2 selective NSAIDs. In order to evaluate this selectivity, we have developed and validated an enzymatic method. The precision and reproducibility of the assay were determined and COX-2 selectivity examined using nimesulide and indometacin. [less ▲]

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See detailDepressive vulnerability is not an independent risk factor for osteoporosis in postmenopausal women.
Reginster, Jean-Yves ULg; Deroisy, Rita ULg; Paul, I. et al

in Maturitas (1999), 33(2), 133-7

Major depression has been repeatedly but not consistently reported to be associated with low bone mineral density (BMD) and to an increased risk for fracture in women. We have investigated, in healthy ... [more ▼]

Major depression has been repeatedly but not consistently reported to be associated with low bone mineral density (BMD) and to an increased risk for fracture in women. We have investigated, in healthy postmenopausal women, whether depressive symptomatology, assessed by the General Health Questionnaire (GHQ), was associated to a significant decrease in BMD, hence supporting the hypothesis of an independent pathogenetic link between the two disorders. We investigated 121 postmenopausal women, aged 48-77 years, spontaneously attending a screening visit for osteoporosis in an outpatient facility. BMD of the spine and the non-dominant hip (total and neck areas) were measured by Dual Energy X-Ray absorptiometry. All subjects completed to the 'General Health Questionnaire' translated and validated in French. No significant correlations were observed between the GHQ score and BMD of the spine (P = 0.54), the total hip area (P = 0.65), or the femoral neck area (P = 0.65). No differences in terms of spinal or femoral BMD were observed between women with GHQ score < 5 or > or = 5. When comparing values of BMD between women within the upper and the lower quartiles for GHQ score, no difference was observed for spine (P = 0.69), total hip (P = 0.80), or femoral neck (P = 0.93). Similarly, GHQ scores were not significantly different when comparing women in the upper and lower quartiles of BMD distribution at the spine or the hip. In conclusion, notwithstanding the clinical pattern of postmenopausal osteoporosis can lead to depression and, on the other hand, hormonal and behavioral disturbances reported in depression might be enhancing factors for accelerated bone loss, our present results do not support the hypothesis that otherwise healthy postmenopausal women with increased depressive complaints are also more prone to exhibit osteoporotic fractures. [less ▲]

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See detailEtude pilote : Case management intégré dans les hôpitaux belges.
de Froidmont, C.; Dejace, Alain ULg; Englebert, L. et al

Report (1999)

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See detailEstablished postmenopausal osteoporosis – Assessment of treatment options
Reginster, Jean-Yves ULg; Halkin, V.; Fraikin, G. et al

in Menopause Review (1999), 1(IV), 39-55

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See detailProphylactic Use of Alfacalcidol in Corticosteroid-Induced Osteoporosis
Reginster, Jean-Yves ULg; Kuntz, D.; Verdickt, W. et al

in Osteoporosis International (1999), 9(1), 75-81

One hundred and forty-five patients suffering from diseases requiring long-term treatment with high doses of corticosteroids (30 mg/day or greater of prednisolone) were recruited to the study. Patients ... [more ▼]

One hundred and forty-five patients suffering from diseases requiring long-term treatment with high doses of corticosteroids (30 mg/day or greater of prednisolone) were recruited to the study. Patients had to be steroid naive on entry to the study (not more than 15 days of treatment with a corticosteroid within the previous 24 months). Patients were randomized to receive either 1 microgram/day alfacalcidol or placebo capsules for 12 months. Bone mineral density (BMD) of the lumbar spine was assessed by dual-photon absorptiometry on entry and after 3, 6 and 12 months' treatment. Safety was monitored by the recording of all adverse events reported by patients and the regular screening of blood samples for hematology and serum biochemistry. Of the 145 patients, 74 were randomized to alfacalcidol and 71 to placebo. The treatment groups were well matched at baseline with no significant differences in demographic, clinical or biochemical parameters. The mean equivalent dose of prednisolone at baseline was 46.6 mg/day and 46.3 mg/day for the alfacalcidol and placebo group respectively. From the 145 patients randomized to treatment, 71 (38 who received alfacalcidol and 33 who received placebo) provided BMD data both at baseline and at 3, 6 and 12 months. The percentage change in BMD after 6 months' treatment was -2.11% in the alfacalcidol group and -4.00% in the placebo group (p = 0.39). After 12 months the percentage change in BMD was +0.39% (CI: -4.28 to 4.81) in the alfacalcidol group and -5.67% (CI: -8.13 to -3.21) in the placebo group, this difference (6.06%, CI: 0.88 to 11.24) being statistically significant (p = 0.02). An intention to treat analysis also showed a significant difference between the two treatment groups in alfacalcidol's favor (3.81%, p = 0.01; CI: 0.92 to 6.70). There was no significant difference between the two treatment groups in the corticosteroid dose at any time point during the study. Serum calcium was measured throughout and there were no significant differences between the two treatment groups at any visit. This study suggests that alfacalcidol can prevent corticosteroid-induced bone loss from the lumbar spine. Long-term use of alfacalcidol was not associated with any significant adverse effects in this diverse group of patients. [less ▲]

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See detailTreatment of Osteoporosis: Role of Bone-Forming Agents
Reginster, Jean-Yves ULg; Halkin, V.; Henrotin, Yves ULg et al

in Osteoporosis International (1999), 9 Suppl 2

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See detailGonarthrose: intérêt de l'évaluation isocinétique
Croisier, Jean-Louis ULg; Henrotin, Yves ULg; Dumont, R. et al

in KINE 2000 (1998, December), 9(98/5), 90

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See detailMorphometric Study of the Equine Navicular Bone: Variations with Breeds and Types of Horse and Influence of Exercise
Gabriel, Annick ULg; Jolly, Sandra ULg; Detilleux, Johann ULg et al

in Journal of Anatomy (1998), 193((Pt 4)), 535-49

Navicular bones from the 4 limbs of 95 horses, classified in 9 categories, were studied. The anatomical bases were established for the morphometry of the navicular bone and its variations according to the ... [more ▼]

Navicular bones from the 4 limbs of 95 horses, classified in 9 categories, were studied. The anatomical bases were established for the morphometry of the navicular bone and its variations according to the category of horse, after corrections were made for front or rear limb, sex, weight, size and age. In ponies, navicular bone measurements were smallest for light ponies and regularly increased with body size, but in horses, navicular bone dimensions were smallest for the athletic halfbred, intermediate for draft horse, thoroughbreds and sedentary halfbreds and largest for heavy halfbreds. The athletic halfbred thus showed reduced bone dimensions when compared with other horse types. Navicular bones from 61 horses were studied histomorphometrically. Light horses and ponies possessed larger amounts of cancellous bone and less cortical bone. Draft horses and heavy ponies showed marked thickening of cortical bone with minimum intracortical porosity, and a decrease in marrow spaces associated with more trabecular bone. Two distinct zones were observed for the flexor surface cortex: an external zone composed mainly of poorly remodelled lamellar bone, disposed in a distoproximal oblique direction, and an internal zone composed mainly of secondary bone, with a lateromedial direction for haversian canals. Flexor cortex external zone tended to be smaller for heavy ponies than for the light ponies. It was the opposite for horses, with the largest amount of external zone registered for draft horses. In athletic horses, we observed an increase in the amount of cortical bone at the expense of cancellous bone which could be the result of reduced resorption and increased formation at the corticoendosteal junction. Cancellous bone was reduced for the athletic horses but the number of trabeculae and their specific surfaces were larger. Increased bone formation and reduced resorption could also account for these differences. [less ▲]

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See detailEfficacy and Tolerability of Calcitonin in the Prevention and Treatment of Osteoporosis
Halkin, V; Reginster, Jean-Yves ULg

in BioDrugs : Clinical Immunotherapeutics, Biopharmaceuticals & Gene Therapy (1998), 10(4), 295-300

Calcitonin in general, and, more specifically, salmon calcitonin (salcatonin), has been known for 30 years to be a specific inhibitor of bone resorption. Studies have confirmed its efficacy in metabolic ... [more ▼]

Calcitonin in general, and, more specifically, salmon calcitonin (salcatonin), has been known for 30 years to be a specific inhibitor of bone resorption. Studies have confirmed its efficacy in metabolic bone diseases characterised by excessive bone resorption, such as osteoporosis. Most randomised studies in which salcatonin and oral calcium were administered for 1 to 5 years to recently postmenopausal women for the prevention of osteoporosis have shown that bone mineral density or bone content of the lumbar spine increased significantly, compared with a reduction among women receiving calcium only. Prospective studies have shown that salcatonin is effective in the treatment of established osteoporosis, reducing significantly the relative risk of new vertebral fractures. The benefits of salcatonin nasal spray therapy were observed in the majority of women studied, and it has been shown to be an effective alternative for osteoporotic women more than 5 years postmenopausal who refuse estrogens, or for whom estrogens are contraindicated. Finally, in established osteoporosis, nasal calcitonin possesses a potent analgesic effect. The well-demonstrated effects of nasal calcitonin permit it to be considered a well tolerated and efficient approach for prevention and treatment of postmenopausal osteoporosis. [less ▲]

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See detailNitric Oxide Downregulates Interleukin 1β (IL-1β) Stimulated IL-6, IL-8, and Prostaglandin E2 Production by Human Chondrocytes
Henrotin, Yves ULg; Zheng, S. X.; Deby, G. P. et al

in Journal of Rheumatology (1998), 25(8), 1595-601

OBJECTIVE: To investigate the effects of endogenously produced nitric oxide (NO) on interleukin 6 (IL-6), IL-8, prostaglandin E2 (PGE2), and proteoglycan production by human chondrocytes. METHODS: Human ... [more ▼]

OBJECTIVE: To investigate the effects of endogenously produced nitric oxide (NO) on interleukin 6 (IL-6), IL-8, prostaglandin E2 (PGE2), and proteoglycan production by human chondrocytes. METHODS: Human articular chondrocytes were isolated from their extracellular matrix by triple successive enzymatic digestion of the cartilage and cultured 48 h in a well defined culture medium. IL-6 and IL-8 were directly assayed into culture media by specific enzyme amplified sensitivity immunoassays. Proteoglycans and PGE2 were quantified by specific radioimmunoassays. Cell culture media were assayed for NO2 using a spectrophotometric assay based upon the Griess reaction. RESULTS: Unstimulated chondrocytes produced low levels of NO, IL-6, IL-8, and PGE2. Production was significantly stimulated by IL-1beta and lipopolysaccharide (LPS). As well, proteoglycan synthesis was profoundly inhibited by IL-1beta and LPS. Inhibition of NO synthesis with the competitive inhibitor NG-monomethyl-L-arginine (L-NMMA) led to enhancement of IL-6, IL-8, and PGE2 production stimulated by either IL-1beta alone or in combination with LPS, whereas the inhibition of proteoglycan production by IL-1beta was not modified by L-NMMA. CONCLUSION: LPS and IL-1beta stimulated IL-6, IL-8, and PGE2 production are downregulated by endogenously produced NO, which could limit the inflammatory reaction occurring in arthritis. [less ▲]

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See detailThe Effect of Sodium Monofluorophosphate Plus Calcium on Vertebral Fracture Rate in Postmenopausal Women with Moderate Osteoporosis. A Randomized, Controlled Trial
Reginster, Jean-Yves ULg; Meurmans, L.; Zegels, Brigitte ULg et al

in Annals of Internal Medicine (1998), 129(1), 1-8

BACKGROUND: Fluoride is effective in increasing trabecular bone mineral density (BMD) in the spine, but its efficacy in reducing vertebral fracture rates and its effect on BMD at cortical sites are ... [more ▼]

BACKGROUND: Fluoride is effective in increasing trabecular bone mineral density (BMD) in the spine, but its efficacy in reducing vertebral fracture rates and its effect on BMD at cortical sites are controversial. OBJECTIVE: To study the effect of low-dose fluoride (sodium monofluorophosphate [MFP]) plus a calcium supplement over 4 years on vertebral fractures and BMD at the lumbar spine and total hip in postmenopausal women with moderately low BMD of the spine. DESIGN: Randomized, double-blind, controlled clinical trial. SETTING: Outpatient clinic for osteoporosis at a university medical center. PATIENTS: 200 postmenopausal women with osteoporosis (according to the World Health Organization definition) and a T-score less than -2.5 for BMD of the spine. INTERVENTION: Women were randomly assigned (100 patients per group) to continuous daily treatment for 4 years with 1) oral MFP (20 mg of equivalent fluoride) plus 1000 mg of calcium (as calcium carbonate) or 2) calcium only. MEASUREMENTS: Lateral spine radiographs were taken at enrollment and at each year of follow-up for detection of new vertebral fractures (defined as a reduction > or =20% and > or =4 mm from baseline in any of the heights of a vertebral body). Nonvertebral fractures were also recorded. All analyses were done with the intention-to-treat approach. RESULTS: Radiologic follow-up was possible for 164 of 200 patients (82%). The rate of new vertebral fractures during the 4 years of the study was lower in the MFP-plus-calcium group (2 of 84 patients; 2.4% [95% CI, 0.3% to 8.3%]) than in the calcium-only group (8 of 80 patients; 10% [CI, 4.4% to 18.8%]). The difference between the groups was 7.6 percentage points (CI, 0.3 to 15 percentage points) (P = 0.05). A moderate but progressive increase in BMD of the spine (10.0% +/- 1.5% at 4 years) was found for MFP plus calcium compared with calcium only (P < 0.001), whereas the more modest increase in BMD of the total hip seen with MFP plus calcium (1.8% +/- 0.6%) did not differ from the increase seen with calcium only. CONCLUSIONS: Low-dose fluoride (20 mg/d) given continuously with calcium for prolonged periods can decrease vertebral fracture rates compared with calcium alone in patients with mild to moderate osteoporosis. [less ▲]

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See detailTherapy for Osteoporosis. Miscellaneous and Experimental Agents
Reginster, Jean-Yves ULg; Taquet, A. N.; Gosset, Christiane ULg

in Endocrinology & Metabolism Clinics of North America (1998), 27(2), 453-63

None of the currently available medications for osteoporosis have demonstrated an ability to fully prevent the occurrence of new vertebral or peripheral osteoporotic fractures once the disease is ... [more ▼]

None of the currently available medications for osteoporosis have demonstrated an ability to fully prevent the occurrence of new vertebral or peripheral osteoporotic fractures once the disease is established. Several new therapies, therefore, are currently being developed to optimize the risk/benefit ratio of osteoporosis treatment. This article discusses a number of treatments currently being considered, including anabolic steroids, growth hormone or insulin-like growth factors, ipriflavone, parathyroid peptides, and strontium. Several other compounds have been suggested recently for treatment of osteoporosis and other are at very early stages of their development. In addition to pharmacologic approaches to the treatment of osteoporosis, hip protectors also may reduce hip fractures. [less ▲]

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See detailComputerised method to measure asymetrical articular compression on digitised X-rays
Caudron, I; Henrotin, Yves ULg; Reginster, Jean-Yves ULg et al

in Rivista SIDI Proceedings 5th WEVA Congress (1st part) (1998)

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See detailReproducibility and diagnostic sensitivity of ultrasonometry of the phalanges to assess osteoporosis.
Reginster, Jean-Yves ULg; Dethor, M; Pirenne, H et al

in International Journal of Gynecology & Obstetrics (1998), 63(1), 21-8

OBJECTIVE: The present study was designed to assess the reproducibility and the diagnostic sensitivity of the amplitude-dependent speed of sound (SoS) at the distal metaphysis of the proximal phalanges ... [more ▼]

OBJECTIVE: The present study was designed to assess the reproducibility and the diagnostic sensitivity of the amplitude-dependent speed of sound (SoS) at the distal metaphysis of the proximal phalanges. METHOD: Fourteen presumably healthy volunteers were repeatedly measured every 6 weeks for approximately 6 months in order to assess the reproducibility of the SoS of the phalanges. We recruited 91 post-menopausal women, aged 55-75 years, who were divided in three groups according to their lumbar bone mineral density (BMD) and the existence of prevalent vertebral fractures. The objective was to evaluate the diagnostic sensitivity of SoS measurements. We used DBM Sonic 1200 equipment, and assessed the velocity at which US cross the phalanx in a lateral-medial direction. In post-menopausal women, BMD was measured by dual energy X-ray absorptiometry (DXA) at the level of the lumbar spine, the total zone of the non-dominant hip and the femoral neck zone of the non-dominant hip. RESULTS: The precision of the SoS measurements was 0.71+/-0.05% (mean+/-S.E.M) whereas the reproducibility was 0.95+/-0.06%. Subjects with low BMD or prevalent fractures had significantly lower values of SoS (P < 0.001) than the controls. ROC curve analysis applied to the study population confirmed that SoS was able to discriminate between the controls and osteoporotic subjects (area under the ROC curves were 0.82 (low bone mineral density) and 0.85 (prevalent fractures), respectively). Hip BMD was found to be the most significant variable when comparing the controls and the low density patients by stepwise discrimination and SoS significantly improved the discrimination between the groups when added to the hip BMD. The hip BMD was again the most discriminant variable when applying the same techniques to controls and patients with prevalent fractures, followed by SoS and lumbar BMD. A cut-off value of 1881 m/s is defined for SoS by logistic discrimination and likelihood ratio function. With this value, the sensitivity and the specificity for SoS used in the diagnosis of established osteoporosis were, 81.5% and 79.3%, respectively. Sensitivity and specificity were significantly improved when combining ultrasonometry and densitometry. CONCLUSION: Measurement of ultrasound velocity at the phalanges appears to be a precise and reproducible technique. SoS discriminates between normal post-menopausal women and patients with either low lumbar BMD or prevalent fractures to the same extent as BMD measurements. [less ▲]

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