Cognitive Rehabilitation in Sickle Cell Disease

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01793740
Recruitment Status : Completed
First Posted : February 18, 2013
Last Update Posted : August 20, 2014
Information provided by (Responsible Party):
Duke University

February 14, 2013
February 18, 2013
August 20, 2014
October 2012
July 2014   (Final data collection date for primary outcome measure)
Feasibility [ Time Frame: Post-study - Baseline to Post-Intervention, approximately 5 to 8-weeks after baseline assessment ]
Feasibility is defined as 75% of subjects completing 80% of the training program.
Same as current
Complete list of historical versions of study NCT01793740 on Archive Site
Efficacy [ Time Frame: Baseline to Post-Intervention, approximately 5 to 8-weeks after baseline assessment ]
Efficacy will be defined by participant performance on cognitive outcome measures including executive functioning outcomes from the Cogstate.
Same as current
Acceptance [ Time Frame: After the recruitment period has been completed (approximately 2-years) ]
Acceptance is defined by 50% of those approached are able to participate/consent to the study.
Same as current
Cognitive Rehabilitation in Sickle Cell Disease
Cognitive Rehabilitation of Children With Sickle Cell Disease: A Pilot Study
The majority of school-age children with sickle cell disease (SCD) experience neurocognitive deficits, even in the absence of stroke. In particular, deficits in attention and working memory have emerged as two of the most common neurocognitive sequelae of SCD. Thus, the goal of the present proposal is to address feasibility and compliance of a novel computerized cognitive training program, Cogmed. Pilot data will also be collected to establish preliminary efficacy. Twenty-four children meeting initial age and diagnostic criteria will be identified and approached about participation by their attending physician during regularly-scheduled SCD clinic visits. Baseline assessments will include a brief measure of intellectual functioning, a brief cognitive testing battery evaluating processing speed and working memory, in addition to questionnaires regarding behavior and quality of life. Children will then be randomized to the computerized CT program Cogmed (n=12) or a waitlist control (n=12). Participants enrolled in the computerized CT program will be asked to complete 25-sessions of Cogmed over a five to eight week period (3 to 5 sessions per week). Following completion of the program, children and their parents will be asked to return to clinic for a follow-up visit. After a five to eight-week waiting period, children in the waitlist condition will also be asked to return to clinic for a second visit. Following this assessment, participants initially enrolled in the waitlist will be offered an opportunity to participant in the intervention. If interested, they will follow the same intervention protocol described above. These children will return to clinic for a third visit following completion of the intervention. Compliance rate and its confidence interval will be calculated for the overall study population. A t-test for binomial proportion with continuity correction will be used to examine whether the compliance rate is lower than the target. Participants' change in criterion outcomes will be evaluated (i.e., those neurocognitive measures such as attention, executive functioning and working memory, that are most closely related to the trained tasks).
Not Provided
Not Applicable
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
  • Sickle Cell Disease
  • Cognitive Impairment
Behavioral: Cogmed
Computer based program that aims to improve children's memory, attention, and processing speed.
Other Name: Cogmed computerized cognitive training
  • Experimental: Cogmed
    These children are enrolled in the Cogmed intervention.
    Intervention: Behavioral: Cogmed
  • No Intervention: Waitlist
    These children are enrolled in a waitlist condition, after which they will be offered the opportunity to complete the intervention.
Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
July 2014
July 2014   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • 1) Children with a diagnosis of SCD (all genotypes)
  • 2) a T-score ≥75th percentile on either the Metacognition or Executive Composite of the BRIEF; and/or
  • 3) a standard score ≥1 standard deviation below the mean (<90) on the tasks of executive function or WM from the Cogstate (mean=100; SD=10)

Exclusion Criteria:

  • 1) Estimated IQ ≤ 75), or motor, visual, or auditory handicap that prevents computer use;
  • 2) a diagnosis of depression or a pervasive developmental disorder (by history);
  • 3) clinical stroke (via record medical history); or
  • 4) non-English fluency.
Sexes Eligible for Study: All
8 Years to 16 Years   (Child)
Contact information is only displayed when the study is recruiting subjects
United States
Not Provided
Not Provided
Duke University
Duke University
Not Provided
Principal Investigator: Melanie J Bonner, PhD Duke University
Duke University
August 2014

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP