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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| High-dose vitamin D group | Experimental | Vitamin D2 softgels 50,000 U/week |
|
| Low-dose vitamin D group | Experimental | low-dose vitamin D group |
|
| Control group | Placebo Comparator | Placebo |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| High-dose vitamin D2 softgels | Drug | 5000U/capsule of vitamin D2 soft capsule; High-dose VD group 50,000 U/week, 5 vitamin D2 softgels given twice a week each time; 25(OH)D > 80ng/ml after 3 months of intervention or within 3 months in both groups, changed to 5,000 U/ weekly maintenance until the full 6 months of intervention. To prevent unmasking, the maintenance dose was still given twice weekly (the first time 1 vitamin D2 capsule + 4 placebo capsules were given and the second time 5 placebo capsules were given) |
| Measure | Description | Time Frame |
|---|---|---|
| Differences in changes in PTH levels from baseline to 6 months of intervention | baseline,at 6 months intervention |
| Measure | Description | Time Frame |
|---|---|---|
| Differences in changes in PTH levels from baseline to intervention at 1months、2months、3months、4months、5months | baseline,at 1,2,3,4,5 months intervention | |
| Proportion of 25(OH)D >30ng/ml at 3 months of intervention | at 3 months intervention |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Hongli Jiang, Professor | Contact | 13700280897 | j92106@sina.com |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| The First Affiliated Hospital of Xi 'an Jiaotong University | Recruiting | Xi'an | Shaanxi | 710061 | China |
The data including baseline characteristics of study population, blood biochemical index and main outcome measures may be made available.
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|
| low-dose vitamin D2 softgels | Drug | 5000U/capsule of vitamin D2 soft capsule; low-dose VD group 25,000 U/week, 3 vitamin D2 softgels + 2 placebo in the first dose, 2 vitamin D2 softgels + 3 placebo in the second dose, 25(OH)D > 80ng/ml after 3 months of intervention or within 3 months in both groups, changed to 5,000 U/ weekly maintenance until the full 6 months of intervention. To prevent unmasking, the maintenance dose was still given twice weekly (the first time 1 vitamin D2 capsule + 4 placebo capsules were given and the second time 5 placebo capsules were given); |
|
| placebo | Drug | placebo was filled with excipients (aniseed ether, refined vegetable oil), and the shape and size were the same as vitamin D2 soft capsule.the control group was given placebo, 5 placebo capsules twice weekly for 6 months of the intervention. The medication was dispensed by a designated person (not the investigator) in advance and independently according to the patient's medication number (only the drug number was provided on the outer packaging). |
|
| Trends in changes in 25(OH)D levels from baseline to intervention at 1months、2months、3months、4months、5months、6months | baseline,at 1,2,3,4,5,6 months intervention |
| Incidence of cardiovascular events after 6 months of intervention | baseline,at 6 months intervention |
| Change in prevalence of vascular calcification at 6 months of intervention | We used cardiac ultrasound and lateral abdominal views to look for vascular calcification | baseline,at 6 months intervention |
| Change in Montreal Cognitive Assessment Scale scores at 6 months of intervention | A total score of 30 on this scale, with a score of ≥26 indicating normal; a score of <26 indicates the presence of cognitive impairment: 18-26 for mild cognitive impairment, 10-17 for moderate cognitive impairment and <10 for severe cognitive impairment | baseline,at 6 months intervention |
| Trends in blood calcium levels at 1 month, 2 months, 3 months, 4 months, 5 months and 6 months of intervention | baseline,at 1,2,3,4,5,6 months intervention |
| Trends in blood phosphorus levels at 1 month, 2 months, 3 months, 4 months, 5 months and 6 months of intervention | baseline,at 1,2,3,4,5,6 months intervention |
| Trends in FGF23 levels at 3 and 6 months of intervention | baseline,at 3,6 months intervention |
| Trends in Osteocalcin(OC) levels at 3 and 6 months of intervention | baseline,at 3,6 months intervention |
| Trends in Precollagen type I amino-terminal peptide(PINP) levels at 3 and 6 months of intervention | baseline,at 3,6 months intervention |
| Trends in β specific collagen degradation products(β-CTX) levels at 3 and 6 months of intervention | baseline,at 3,6 months intervention |
| Trends in ALP levels at 3 and 6 months of intervention | baseline,at 3,6 months intervention |
| Incidence of fractures at 6 months of intervention | Ask if the patient had a fracture during the intervention, the site of the fracture and the type of fracture | baseline,at 6 months intervention |
| Incidence of falls at 6 months of intervention | Ask if the patient has fallen during the intervention, the number of falls and the reasons for them | baseline,at 6 months intervention |
| ID | Term |
|---|---|
| D014808 | Vitamin D Deficiency |
| ID | Term |
|---|---|
| D001361 | Avitaminosis |
| D003677 | Deficiency Diseases |
| D044342 | Malnutrition |
| D009748 | Nutrition Disorders |
| D009750 | Nutritional and Metabolic Diseases |
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