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Effects of Vitamin D in Parkinson's Disease (PD)

8 febbraio 2016 aggiornato da: VA Office of Research and Development

The Effects of Vitamin D on Balance in Persons With PD

A trial to measure the effects of vitamin D (versus a placebo) on balance, gait, falls, strength, and cognition in persons with Parkinson's disease.

Panoramica dello studio

Descrizione dettagliata

The proposed study is a randomized, double-blinded, placebo controlled intervention trial to measure the effects of vitamin D at (10,000IU/day) versus placebo on balance and falls in Parkinson's disease. The investigators will measure static, dynamic, and ambulatory balance, as well as strength, falls, and cognition before and after 16 weeks of therapy. Dynamic posturography will be used to measure static and ambulatory balance, a device called iMOBILITY will measure a timed up and go, and strength will be measured with the Biodex machine checking knee flexion and extension. Multiple quality of life and cognitive tests will also be performed.

Tipo di studio

Interventistico

Iscrizione (Effettivo)

101

Fase

  • Fase 2

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Luoghi di studio

    • Oregon
      • Portland, Oregon, Stati Uniti, 97239
        • VA Portland Health Care System, Portland, OR

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

Da 50 anni a 99 anni (Adulto, Adulto più anziano)

Accetta volontari sani

No

Sessi ammissibili allo studio

Tutto

Descrizione

Inclusion Criteria:

  • Parkinson's disease;
  • ability to ambulate 50 feet;
  • ability to cooperate with balance testing;
  • vitamin D level less than 40ng/ml;
  • balance problems;
  • ability to walk 50 feet without the help of another person

Exclusion Criteria:

  • MMSE < 25;
  • another neurological or orthopedic deficit that in the examiner's opinion would affect testing;
  • history of renal stones or hypercalcemia;
  • unwillingness to not be on other vitamin D supplementation during the study

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Trattamento
  • Assegnazione: Randomizzato
  • Modello interventistico: Assegnazione parallela
  • Mascheramento: Quadruplicare

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Comparatore attivo: Arm 1
Will be on high dose vitamin D3 (10,000 IU daily) and 1000 mg of calcium
Vitamin D3 at 10,000 IU a day
1000mg calcium daily
Comparatore placebo: Arm 2
Will be on placebo and 1000mg of calcium.
1000mg calcium daily
A placebo pill with similar appearance to the vitamin D3 will be given to those in the placebo arm

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Change in Static Balance as Recorded Using Dynamic Posturography With the Sensory Organization Test (SOT 1-3)
Lasso di tempo: Baseline, 16 weeks
Sensory organization test (SOT) is a form of posturography. which is designed to assess quantitatively an individual's ability to use visual, proprioceptive and vestibular cues to maintain postural stability in stance. The SOT measures sway during 6 scenarios. In scenarios 1-3 the base is stable and eyes are open, then closed, and then the visual surround moves. SOT 1-3 is an average measurement of equilibrium - the average center of gravity sway for each condition. It generates a score of 0 (fall) up to 100 for each scenario and an overall composite score. Change score is measurement at 16 weeks minus measurement at baseline.
Baseline, 16 weeks
Change in Ambulatory Balance Measured by Instrumented Timed up and go (iTUG) Turn Duration
Lasso di tempo: Baseline and 16 weeks
This is a test that measures ambulatory balance and mobility. The instrumented timed up and go (iTUG) is an average time (seconds) of three trials that involve the participant arising from a chair, walking 25 feet turning around, walking back to the chair, and sitting down. The turn duration is the average time to turn at the end of the 25 foot walk. Longer duration of time (seconds) indicates more rigidity, a proxy measure for "ON" time in Parkinson's disease. Change score is measurement at 16 weeks minus measurement at baseline.
Baseline and 16 weeks
Change in Strength as Recorded by Measuring Knee Flexion Using Biodex (Total Work)
Lasso di tempo: Baseline, 16 weeks
Defined as the total muscular force output for the repetition with the greatest amount of work. The equation for work is: W = F x D. Change score is measurement at 16 weeks minus measurement at baseline.
Baseline, 16 weeks
Change in Dynamic Balance as Recorded Using Dynamic Posturography With the Sensory Organization Test (SOT 4-6)
Lasso di tempo: Baseline, 16 weeks
Sensory organization test (SOT) is a form of posturography. which is designed to assess quantitatively an individual's ability to use visual, proprioceptive and vestibular cues to maintain postural stability in stance. The SOT measures sway during 6 scenarios. In 4-6 the base moves and the subject has eyes open, then closed, then the visual surround moves. SOT 4-6 is an average measurement of equilibrium - the average center of gravity sway for each condition. It generates a score of 0 (fall) up to 100 for each scenario and an overall composite score. Change score is measurement at 16 weeks minus measurement at baseline.
Baseline, 16 weeks
Change in Strength as Recorded by Measuring Knee Extension Using Biodex (Total Work)
Lasso di tempo: Baseline, 16 weeks
Defined as the total muscular force output for the repetition with the greatest amount of work. The equation for work is: W = F x D. Change score is measurement at 16 weeks minus measurement at baseline.
Baseline, 16 weeks

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Change in Cognition (Trail Making Test B-A)
Lasso di tempo: Baseline, 16 weeks
The Trail Making Test (TMT) consists of two parts (A & B) in which the subject is instructed to connect a set of 25 dots as quickly as possible while still maintaining accuracy. The test provides information about visual search speed, scanning, speed of processing, and executive functioning. Part A measures processing speed and part B measures executive functioning. The TMT is time to complete each part of the test in seconds. Higher scores indicate greater impairment. Subtracting part A from part B is theorized to reduce the influence of the working memory and visuospatial demands and, therefore, provides a relatively pure indicator of executive function. Change score is measurement (Part B - Part A) at 16 weeks minus measurement (Part B - Part A) at baseline, negative scores indicate a improvement in executive functioning.
Baseline, 16 weeks
Change in Quality of Life as Recorded Using Quality of Life Scales (PDQ39)
Lasso di tempo: Baseline, 16 weeks
The PDQ39 is a 39 item patient completed survey targeting well-being and functioning in PD. This scale address 8 dimensions (mobility, activities of daily living, emotional well-being, stigma, social support, cognitions, communication, and bodily discomfort). The PDQ39 dimension scores are on a scale of 0 ("Never") to 4 ("Always/Cannot Do"). Scale scores are summed and range from 0 to 100 with 100 being the maximum level of problems. For a single index figure to characterize the impact of Parkinson's disease upon PD patients (PDSI), all 39 items of the PDQ39 can be summed. The PDQ39 and the use of a PDSI have shown adequate reliability and convergent validity. Change score is measurement at 16 weeks minus baseline measurement, negative scores indicate an improvement in quality of life.
Baseline, 16 weeks
Change in Parkinsonism as Measured by the UPDRS
Lasso di tempo: Baseline, 16 weeks
This is the motor subsection of the UPDRS and is a commonly used tool to rate the symptoms of Parkinson's disease. This scale rates from 0 (normal) to 4 (Can barely perform the task) several motor areas including speech, facial expression, tremor, rigidity, hand movements, agility, posture, and gait. A sum score represents motor function with higher values on this scale represent a more severe stage of the disease. Change is measurement at 16 weeks minus baseline measurement, negative scores indicate an improvement in Parkinson's motor symptoms.
Baseline, 16 weeks

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Investigatori

  • Investigatore principale: Amie Hiller, MD BS, VA Portland Health Care System, Portland, OR

Pubblicazioni e link utili

La persona responsabile dell'inserimento delle informazioni sullo studio fornisce volontariamente queste pubblicazioni. Questi possono riguardare qualsiasi cosa relativa allo studio.

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio

1 maggio 2011

Completamento primario (Effettivo)

1 gennaio 2015

Completamento dello studio (Effettivo)

1 gennaio 2015

Date di iscrizione allo studio

Primo inviato

23 aprile 2010

Primo inviato che soddisfa i criteri di controllo qualità

5 maggio 2010

Primo Inserito (Stima)

7 maggio 2010

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Stima)

7 marzo 2016

Ultimo aggiornamento inviato che soddisfa i criteri QC

8 febbraio 2016

Ultimo verificato

1 febbraio 2016

Maggiori informazioni

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .

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