Trial · NCT01281475
A Trial of Levodopa in Angelman Syndrome
NCT01281475, Phase 2, Phase 3, Completed, Wen-Hann Tan; results first posted 2017-01-13
3 sourcestrials-2026-11-12-0.5.0
Cite this record
ConductScience Library. A Trial of Levodopa in Angelman Syndrome. Trials, record NCT01281475. Release trials-2026-11-12-0.5.0, 12 Nov 2026. https://conductscience.org/library/trials/NCT01281475
On this page
Trial
As registered on ClinicalTrials.gov, in the graph's capture of the registry.
- Title
- A Trial of Levodopa in Angelman Syndrome
- NCT number
- NCT01281475
- Status
- Completed
- Phases
- Phase 2, Phase 3
- Enrollment
- 67 participants, actual
- Lead sponsor
- Wen-Hann Tan
- Conditions
- Angelman Syndrome
- Interventions
- Levodopa, Placebo Oral Capsule
- First posted
- 2011-01-24
- Last updated
- 2020-07-15
- Results first posted
- 2017-01-13
Source ClinicalTrials.gov
Registered outcomes2
Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.
| List | Outcome | Time frame | Description |
|---|---|---|---|
| Primary | Bayley Cognitive Age Equivalent at 1 Year | 12 months | |
| Secondary | Presence of Tremors | 1 year |
Source ClinicalTrials.gov
Outcomes2
Each outcome the trial posted results for, in ClinicalTrials.gov's words.
| Type | Outcome | Time frame | Population | Units | Measured as |
|---|---|---|---|---|---|
| PRIMARY | Bayley Cognitive Age Equivalent at 1 Year | 12 months | months | MEAN | |
| SECONDARY | Presence of Tremors | 1 year | Participants | COUNT_OF_PARTICIPANTS |
Source ClinicalTrials.gov
Results by group4
Each measurement the trial posted, group by group, in the words and numbers it posted.
| Outcome | Group | Category | Value | Spread | Units |
|---|---|---|---|---|---|
| Bayley Cognitive Age Equivalent at 1 Year | Levodopa | 19 | Standard Deviation 7 | months | |
| Bayley Cognitive Age Equivalent at 1 Year | Placebo | 19 | Standard Deviation 8 | months | |
| Presence of Tremors | Levodopa | 14 | Participants | ||
| Presence of Tremors | Placebo | 12 | Participants |
Source ClinicalTrials.gov
Participant flow6
How many started, completed or left each group, period by period.
| Period | Milestone | Group | Participants | Units counted |
|---|---|---|---|---|
| Overall Study | STARTED | Levodopa | 33 | |
| Overall Study | STARTED | Placebo | 34 | |
| Overall Study | COMPLETED | Levodopa | 29 | |
| Overall Study | COMPLETED | Placebo | 26 | |
| Overall Study | NOT COMPLETED | Levodopa | 4 | |
| Overall Study | NOT COMPLETED | Placebo | 8 |
Source ClinicalTrials.gov
Adverse events8
Each adverse event the trial posted, group by group: the participants affected out of those at risk.
| Type | Event | Organ system | Group | Affected | At risk | Events |
|---|---|---|---|---|---|---|
| other | Seizures | Nervous system disorders | Levodopa | 11 | 33 | |
| other | Seizures | Nervous system disorders | Placebo | 9 | 34 | |
| serious | Seizure | Nervous system disorders | Levodopa | 2 | 33 | 2 |
| serious | Seizure | Nervous system disorders | Placebo | 0 | 34 | 0 |
| serious | Vomiting | Gastrointestinal disorders | Levodopa | 1 | 33 | 1 |
| serious | Vomiting | Gastrointestinal disorders | Placebo | 0 | 34 | 0 |
| serious | Fever | General disorders | Levodopa | 0 | 33 | 0 |
| serious | Fever | General disorders | Placebo | 1 | 34 | 1 |
Source ClinicalTrials.gov
Adverse event totals6
The totals the trial posted for each group.
| Total | Group | Affected | At risk |
|---|---|---|---|
| Total, all-cause mortality | Levodopa | ||
| Total, all-cause mortality | Placebo | ||
| Total, other adverse events | Levodopa | 11 | 33 |
| Total, other adverse events | Placebo | 9 | 34 |
| Total, serious adverse events | Levodopa | 3 | 33 |
| Total, serious adverse events | Placebo | 1 | 34 |
Source ClinicalTrials.gov
Papers0
The papers the trial lists on ClinicalTrials.gov.
None in this release.
Grants0
The grants NIH RePORTER links to the trial, newest funded first: NIH's, and some of AHRQ's, CDC's, FDA's and VA's. Each shows its title, principal investigators, organization and funder in its newest year.
None in this release.
Trial comparisons2
Comparisons of the trial's two groups, calculated by ConductScience from the counts it posted.
| Comparison | Source |
|---|---|
| Levodopa vs Placebo: Presence of Tremors | Trial comparisons |
| Levodopa vs Placebo: serious adverse events | Trial comparisons |
Tests0
The ConductCognition tests this trial's registered outcomes name, as ScienceGraph matched them in trial-tests-2026-11-12-0.2.1.
None in this release.
Data dates
The day each source was copied for this release.
Sources 3
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNo license stated
- NIH RePORTER's clinical studies and project filesPublic domain
Each source's terms
- ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
- ClinicalTrials.govnone stated
- NIH RePORTER's clinical studies and project filesPublic domain (NIH RePORTER)
ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.
For software
Read this trial from software.
The record and each of its lists are JSON, twenty rows a page. No key.
GET https://conductscience.org/api/trials/v1/NCT01281475
GET https://conductscience.org/api/trials/v1/NCT01281475/registered