Using Different Doses of Active Vitamin D Combined With Neutral Phosphate in Children With X-link… (NCT03820518) | Clinical Trial Compass
UnknownPhase 4
Using Different Doses of Active Vitamin D Combined With Neutral Phosphate in Children With X-linked Hypophosphatemia
China100 participantsStarted 2017-01-01
Plain-language summary
X-linked hypophosphatemia (XLH) is the most common form of heritable rickets. Current treatments include active vitamin D metabolites (e.g. calcitriol) and phosphate salts. There is no consistent weight-based dosing of calcitriol and phosphate now. The primary objective of this study is to establish the efficacy of different dose of calcitriol combined with neutral phosphate in children with XLH.
Who can participate
Age range
1 Year – 12 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Male or female, aged 1-12 years, inclusive
* Diagnosis of XLH by clinical features: serum phosphorus level \< 2.5 mg/dl; ALP?; RSS total score ≥2; bowed legs; short stature; family history with appropriate X-linked inheritance
* Meet at least one of the following: confirmed Phosphate regulating gene with homology to endopeptidases located on the X chromosome (PHEX) mutation in the participant, or serum FGF23 level \>30 pg/ml (Kainos assay)
* Willing to participate the study, and provide an informed consent
* Able to complete all aspects of study and adhere to the visit schedule
Exclusion Criteria:
* Use of growth hormone within 12 months before first visit
* Height \>50 percentile for age and sex specific data
* Presence of nephrocalcinosis or nephrolithiasis
* Serum intact parathyroid hormone level\>170 pg/ml
* Plan to receive orthopaedic surgery in 12 months
* Poor compliance
* Use of gonadotropin-releasing hormone therapy right now
* Use of aluminium hydroxide, steroid, acetazolamide or thiazide drugs within 7 days before first visit
* Not be fit to participant in the study, by the judgement of investigators
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Change From Baseline to Post-treatment in Severity of Rickets as Measured by Rickets Severity Score (RSS) Total Score