Calcium carbonate (Tums), vitamin D
DrugCalcium carbonate 100mg/day (Tums), vitamin D 800 units/day
NCT Number: NCT00186901
Research studies have shown that children who are long-term survivors of childhood leukemia may be at greater risk for early bone loss called osteoporosis. This bone loss may lead to a greater risk of broken bones and other spine and bone problems. However, researchers still do not know much about how frequently this long-term side effect may occur and how severe the problem is.
St. Jude Children's Research Hospital researchers want to determine the frequency and severity of this side effect. They are also studying whether taking calcium and Vitamin D supplements can help children at risk for osteoporosis and if certain factors can be identified -- such as age at diagnosis, cancer treatments, or family history -- that may increase the chances of having osteoporosis. Researchers will take an x-ray study called quantitative computed tomography (QCT) to measure bone mineral density (BMD). The BMD is a measure of bone strength. If a subject's BMD falls below the average, he/she will be assigned to one of two groups. Subjects will be randomly assigned (like tossing a coin) to receive calcium and vitamin D pills. The other half will receive placebo pills that look like the calcium and vitamin D pills.
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Interventional
Phase 3
Metabolic Bone Center at the University of Tennessee, Memphis, Tennessee, United States
The main objectives of the study are:
Secondary Aim
Healthy volunteers accepted: No
Only the study team can determine whether someone qualifies for participation.
Inclusion criteria
Exclusion criteria
Calcium carbonate 100mg/day (Tums), vitamin D 800 units/day
Placebo
Time frame: Baseline, 12 months, 24 months, and at 36 months or study end
The effect of taking calcium and vitamin D supplements was measured using Quantitative Computed Tomography (QCT) to calculate a QTC Z score. A standardized Z-score was calculated to indicate the difference between the patient's Bone Mineral Density (BMD) and the mean value for age and gender-appropriate controls. Z-scores from 0 to +2 are considered normal, above +2 are considered to be elevated, from 0 to -1 are considered to represent a mild BMD deficit, between -1 and -2 are considered to represent moderate deficits, and below -2 are considered to represent severe deficits.
Time frame: Baseline
Using bone mineral density Z-score, assess relationship between predisposing factors (gender) and bone mineral density; a negative value indicates a deficit in bone mineral density.
Time frame: Baseline
Using bone mineral density Z-score, assess relationship between predisposing factors (race) and bone mineral density; a negative value indicates a deficit in bone mineral density.
Time frame: Baseline
Using bone mineral density Z-score, assess relationship between predisposing factors (age groups) and bone mineral density; a negative value indicates a deficit in bone mineral density.
Time frame: Baseline
To compare the bone mineral density scores determined by Quantitative Computed Tomography (QCT) with those determined by dual energy x-ray absorptiometry (DXA) scan. 121 patients at baseline were assessed by both method the QCT and DXA methods to assess Bone Mineral Density.
Time frame: 12 months
To compare the bone mineral density scores determined by Quantitative Computed Tomography (QCT) with those determined by dual energy x-ray absorptiometry (DXA) scan. 218 patients were assessed at 12 months for QCT. 94 were evaluated using DXA. 94 patients received both scans.
Time frame: 24 months
To compare the bone mineral density scores determined by Quantitative Computed Tomography (QCT) with those determined by dual energy x-ray absorptiometry (DXA) scan. 188 patients were assessed at 24 months by the QCT method and 90 were evaluated using the DXA methods to assess Bone Mineral Density. 90 patients received both scans.
Time frame: 36 months
To compare the bone mineral density scores determined by Quantitative Computed Tomography (QCT) with those determined by dual energy x-ray absorptiometry (DXA) scan. 180 patients were assessed at 36 months by the QCT method and 89 were evaluated using the DXA methods to assess Bone Mineral Density. 89 patients received both scans.
Time frame: At enrollment
The Apa1 Vitamin D Receptor has been associated with bone mineral density and bone turnover markers in various patient cohorts but has not been investigated I survivors of childhood
Time frame: At enrollment
The Bsm1 Vitamin D Receptor has been associated with bone mineral density and bone turnover markers in various patient cohorts but has not been investigated I survivors of childhood
St. Jude Children's Research Hospital
Other
Diminished Bone Mineral Density in Survivors of Childhood Acute Lymphoblastic Leukemia (ALL): A Severity-Adapted Clinical Trial
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