Age-Related Eye Disease Study 2 (AREDS2)

This study has been completed.
Information provided by (Responsible Party):
National Eye Institute (NEI) Identifier:
First received: June 14, 2006
Last updated: November 1, 2013
Last verified: November 2013
Results First Received: November 1, 2013  
Study Type: Interventional
Study Design: Allocation: Randomized;   Endpoint Classification: Efficacy Study;   Intervention Model: Parallel Assignment;   Masking: Double Blind (Subject, Investigator);   Primary Purpose: Treatment
Conditions: Age-related Macular Degeneration
Interventions: Dietary Supplement: Lutein/zeaxanthin
Dietary Supplement: DHA/EPA
Drug: Lutein/zeaxanthin and DHA/EPA

  Participant Flow
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Recruitment Details
Key information relevant to the recruitment process for the overall study, such as dates of the recruitment period and locations
Between October 2006 and September 2008 a total of 4,203 participants aged 50 - 85 years were randomized at 82 clinical sites.

Pre-Assignment Details
Significant events and approaches for the overall study following participant enrollment, but prior to group assignment
Prior to randomization, participants had to complete the Qualification phase. They could only be randomized if they took at least 75% of the run-in medication.

Reporting Groups
Placebo/Control Considered control because all participants received the AREDS formulation
Lutein/Zeaxanthin lutein (10mg)/zeaxanthin (2 mg)
DHA/EPA DHA (350 mg)/EPA (650 mg)
Lutein/Zeaxanthin + DHA/EPA lutein (10 mg)/zeaxanthin (2 mg) + DHA (350 mg)/EPA (650 mg)

Participant Flow:   Overall Study
    Placebo/Control     Lutein/Zeaxanthin     DHA/EPA     Lutein/Zeaxanthin + DHA/EPA  
STARTED     1012     1044     1068     1079  
COMPLETED     1007     1038     1062     1069  
NOT COMPLETED     5     6     6     10  

  Baseline Characteristics

  Outcome Measures
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1.  Primary:   Development of Advanced AMD in People at Moderate to High Risk for Progression.   [ Time Frame: 5 years of follow-up ]

2.  Secondary:   Progression to Moderate Vision Loss   [ Time Frame: 5 years of follow-up ]

3.  Secondary:   Adverse Events   [ Time Frame: 5 years of follow-up ]

4.  Secondary:   Progression to Cataract Surgery   [ Time Frame: 5 years of follow-up ]

  Serious Adverse Events

  Other Adverse Events

  Limitations and Caveats
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Limitations of the study, such as early termination leading to small numbers of participants analyzed and technical problems with measurement leading to unreliable or uninterpretable data
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