References of "Lejeune, Emmanuelle"
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See detailDo utility values and willingness to pay suitably reflect health outcome in hip and knee osteoarthritis? A comparative analysis with the WOMAC index
Ethgen, Olivier ULg; Tancredi, Annalisa ULg; Lejeune, Emmanuelle ULg et al

in Journal of Rheumatology (2003), 30(11), 2452-2459

Objective. To establish whether health utility (time trade-off, TTO) and willingness to pay (WTP) values reflect clinical health outcome as evaluated by the Western Ontario McMaster Universities ... [more ▼]

Objective. To establish whether health utility (time trade-off, TTO) and willingness to pay (WTP) values reflect clinical health outcome as evaluated by the Western Ontario McMaster Universities Osteoarthritis Index (WOMAC) in hip and knee osteoarthritis (OA). Methods. One hundred twenty-eight patients with OA attending a specialized arthritis clinic were interviewed about their socioeconomic characteristics and administered the TTO technique and the WOMAC. Their WTP for 2 hypothetical anti-osteoarthritic drugs was also investigated: the first drug was said to provide a significant improvement in WOMAC dimensions and the second a complete cure of the disease. WTP was elicited by both discrete-choice and bidding game methods. Results. Answer rates were 89.1% for TTO, 98.4% for discrete-choice WTP for both scenarios, and 89.8% and 85.2% for bidding game WTP in the relief and the cure scenario, respectively. The mean TTO utility value was 0.84 (standard deviation 0.20). In discrete-choice, those accepting the bid had higher monthly income (euro 1536.5 vs euro 1060. 1, p < 0.001, for the relief scenario and euro 1449.3 vs euro 1071.6, p < 0.001, for the cure scenario). With the bidding game format, WTP was positively correlated with income in both scenarios (r = 0.56, r = 0.55, p < 0.001). WTP measures differed equally between education and socioeconomic groups with those in favored groups consistently reporting higher WTP (Kruskal-Wallis tests statistics ranging from p < 0.01 to p < 0.001). Except for stiffness, WOMAC dimensions were correlated in the expected direction with TTO values (r = -0.27, p < 0.01 for pain and r = -0.36, r = -0.34, p < 0.001 for physical function and total score, respectively). Conclusion. Whereas they showed good feasibility, WTP measures poorly reflected clinical condition and were mainly related to economic status and ability to pay. TTO was correlated with the WOMAC dimensions and may be considered closer to clinical situations than WTP. However, concern arises regarding the homogeneity of the study sample in terms of clinical severity, which may have precluded the identification of a relationship between WTP and clinical status. [less ▲]

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See detailInfluence of daily regimen calcium and vitamin D supplementation on parathyroid hormone secretion
Reginster, Jean-Yves ULg; Zegels, Brigitte ULg; Lejeune, Emmanuelle ULg et al

in Calcified Tissue International (2002), 70(2), 78-82

Calcium and vitamin D supplementation has been shown to reduce secondary hyperparathyroidism and play a role in the management of senile osteoporosis. In order to define the optimal regimen of calcium and ... [more ▼]

Calcium and vitamin D supplementation has been shown to reduce secondary hyperparathyroidism and play a role in the management of senile osteoporosis. In order to define the optimal regimen of calcium and vitamin D supplementation to produce the maximal inhibition of parathyroid hormone secretion, we have compared the administration of a similar amount of Ca and vitamin D, either as a single morning dose or split in two doses, taken 6 hours apart. Twelve healthy volunteers were assigned to three investigational procedures, at weekly intervals. After a blank control procedure, when they were not exposed to any drug intake, they received two calcium-vitamin D supplement regimens including either two doses of Orocal D3 (500 mg Ca and 400 IU vitamin D) 6 hours apart or one water-soluble effervescent powder pack of Cacit D3 in a single morning dose (1000 mg Ca and 880 IU vitamin D). During the three procedures (control and the two calcium-vitamin D supplementations), venous blood was drawn every 60 minutes for up to 9 hours, for serum Ca and serum PTH measurements. The order of administration of the two Ca and vitamin D supplementation sequences was allocated by randomization. No significant changes in serum Ca were observed during the study. During the 6 hours following Ca and vitamin D supplementation, a statistically significant decrease in serum PTH was observed with both regimens, compared with baseline and with the control procedure. Over this period of time, no differences were observed between the two treatment regimens. However, between the sixth and the ninth hour, serum PTH levels were still significantly decreased compared with baseline with split dose Orocal D3 administration, while they returned to baseline value with the Cacit D3 preparation. During this period, the percentage decrease in serum PTH compared with baseline was significantly more pronounced with Orocal D3 than with Cacit D3 (P = 0.0021). We therefore conclude that the administration of two doses of 500 mg of calcium and 400 IU of vitamin D3 6 hours apart provides a more prolonged decrease in serum PTH levels than the administration of the same total amount of Ca and vitamin D as a single morning dose in young healthy volunteers. This might have implications in terms of protection of the skeleton against secondary hyperparathyroidism and increased bone resorption and turnover in elderly subjects. [less ▲]

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See detailInfluence of Daily Calcium and Vitamin D Supplementation on Parathyroid Hormone Secretion
Reginster, Jean-Yves ULg; Zegels, Brigitte ULg; Lejeune, Emmanuelle ULg et al

in Gynecological Endocrinology : The Official Journal of the International Society of Gynecological Endocrinology (2001), 15(1), 56-62

Calcium and vitamin D supplementation have been shown to reduce secondary hyperparathyroidism and play a role in age-related osteoporosis. In order to define the optimal regimen of calcium and vitamin D ... [more ▼]

Calcium and vitamin D supplementation have been shown to reduce secondary hyperparathyroidism and play a role in age-related osteoporosis. In order to define the optimal regimen of calcium and vitamin D supplementation to produce the maximal inhibition of parathyroid hormone secretion, we compared the administration of a calcium-vitamin D supplement as a single morning dose with the administration of two divided doses at 6-hour intervals. Twelve healthy male volunteers were assigned to three investigational procedures, which were alternated at weekly intervals. After a 'blank' control procedure, when they were not exposed to any supplements, they received one of two calcium-vitamin D supplement regimens: either two doses of Orocal D3 (500 mg calcium and 400 IU vitamin D3) with a 6-hour interval between doses, or one water-soluble effervescent powder pack of Cacit vitamin D3, taken in the morning (1000 mg calcium and 880 IU vitamin D3). During the three procedures (control and the two calcium-vitamin D supplementation protocols), veinous blood was drawn every 60 minutes for up to 9 hours, for serum calcium and parathyroid hormone measurements. The order of administration of the two calcium and vitamin D supplementation regimens was allocated by randomization. No significant changes in serum calcium were observed during the study. During the first 6 hours following calcium-vitamin D supplementation, a statistically significant decrease in serum parathyroid hormone was observed with both regimens, compared with baseline and the control procedure. During this first period, no differences were observed between the two treatment regimens. However, between the 6th and the 9th hour, serum parathyroid hormone levels remained significantly decreased compared to baseline with the twice-daily Orocal D3 administration, while they returned to baseline values with the once-daily Cacit D3 preparation. During this period, the percentage decrease in serum parathyroid hormone relative to baseline was significantly greater with Orocal D3 than Cacit D3 (p = 0.0021). We therefore conclude that the twice-daily administration of 500 mg calcium and 400 IU vitamin D3 at 6-hour intervals provides a more prolonged decrease in serum parathyroid hormone levels than the administration of the same total amount of calcium and vitamin D, as a single morning dose in young healthy. [less ▲]

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