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Pain in Sickle Cell Epidemiologic Study

This study has been completed.
National Heart, Lung, and Blood Institute (NHLBI)
Information provided by:
Virginia Commonwealth University Identifier:
First received: May 4, 2002
Last updated: March 23, 2016
Last verified: January 2008
To measure the variability in pain and response to pain in sickle cell disease, and to build multivariate models to explain both patients' pain and their response to pain, especially, utilization of health care.

Blood Disease
Anemia, Sickle Cell

Study Type: Observational
Official Title: Pain in Sickle Cell Epidemiologic Study

Resource links provided by NLM:

Further study details as provided by Virginia Commonwealth University:

Study Start Date: October 2001
Study Completion Date: August 2006
Primary Completion Date: August 2006 (Final data collection date for primary outcome measure)
Detailed Description:


Pain in sickle cell disease is poorly recognized, measured, and treated. Although painful episodes are the most common reason sickle cell patients seek care, studies have seldom directly measured pain in detail. In studies to date, biological and demographic variables alone only partly explain the observed variance in painful episode frequency. Further, little is known about differences in pain responses including home management versus health care utilization.


This cohort study is measuring the variability in pain and response to pain in sickle cell disease, and building multivariate models to explain both patients' pain and their response to pain, especially, utilization of health care. The models' outcome variables include mean pain, painful episodes, and various types of utilization episodes, including non-narcotic analgesic use, narcotic use, office visits, emergency department (ED visits, and hospitalization. An additional outcome is the percentage of each patient's painful episodes that result in various types of utilization. Outcomes will be operationalized using daily pain diaries collected over six months. Reflecting on the prior 24 hours, patients will recall on an ordinal (0-9) scale maximum pain, distress, and disability, judge whether they were in a "crisis," and note pain locations and their various types of utilization. Daily pain intensity ratings will be transformed into pain episode counts using a formulaic threshold for a painful episode. The formula calculates each patient's threshold individually, based on his/her pain ratings. The models will measure the effect of several classes of explanatory variables (demographic, disease-related, psycho social, and readiness to utilize care), operationalized using primary data and validated instruments.

Patients will be recruited from the central and Tidewater regions of Virginia, will undergo an initial survey battery, chart review, and a brief final survey, venipuncture and urine sampling, and complete pain diaries daily for six months. This study will advance knowledge of the etiology and influences on pain and pain response in sickle cell disease. By revealing potentially mutable explanatory variables, the study's results will suggest targets of biobehavioral treatment interventions.


Ages Eligible for Study:   16 Years to 100 Years   (Child, Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
No eligibility criteria
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Please refer to this study by its identifier: NCT00035763

Sponsors and Collaborators
Virginia Commonwealth University
National Heart, Lung, and Blood Institute (NHLBI)
OverallOfficial: Wally Smith Virginia Commonwealth University
  More Information

Publications: Identifier: NCT00035763     History of Changes
Other Study ID Numbers: 1105
R01HL064122 ( US NIH Grant/Contract Award Number )
Study First Received: May 4, 2002
Last Updated: March 23, 2016

Additional relevant MeSH terms:
Hematologic Diseases
Anemia, Sickle Cell
Anemia, Hemolytic, Congenital
Anemia, Hemolytic
Genetic Diseases, Inborn processed this record on April 28, 2017