Article |

DATATOP: A Multicenter Controlled Clinical Trial in Early Parkinson's Disease:  Parkinson Study Group

Arch Neurol. 1989;46(10):1052-1060. doi:10.1001/archneur.1989.00520460028009.
Text Size: A A A
Published online

• DATATOP (Deprenyl and tocopherol antioxidative therapy of parkinsonism) is a placebo-controlled clinical trial designed to test the hypothesis that long-term treatment of patients with early Parkinson's disease with deprenyl 10 mg/d and/or tocopherol (vitamin E) 2000 IU/d will extend the time until disability requires therapy with levodopa (primary end point). At 28 US and Canadian sites, 800 eligible patients in the early stages of untreated Parkinson's disease were enrolled in DATATOP and randomized to (1) active deprenyl, (2) active tocopherol, (3) active deprenyl and tocopherol, or (4) placebo treatments. Subjects are being evaluated systematically at regular intervals over 2 years to determine if and when the primary end point of disability is attained. At baseline evaluation, our cohort represented minimally disabled patients with Parkinson's disease who did not require symptomatic anti-Parkinson's disease medications. Despite an almost 2:1 representation of male-female subjects, no selection biases were identified that might confound the primary end-point analysis. This large DATATOP cohort is expected to provide a high likelihood (power) for detecting significant treatment effects, if indeed they exist.


Sign In to Access Full Content

Don't have Access?

Register and get free email Table of Contents alerts, saved searches, PowerPoint downloads, CME quizzes, and more

Subscribe for full-text access to content from 1998 forward and a host of useful features

Activate your current subscription (AMA members and current subscribers)

Purchase Online Access to this article for 24 hours





Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).
Submit a Comment


Some tools below are only available to our subscribers or users with an online account.

Sign In to Access Full Content

Related Content

Customize your page view by dragging & repositioning the boxes below.