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Neuropathic Pain in Jamaicans With Sickle Cell Disease

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ClinicalTrials.gov Identifier: NCT04015401
Recruitment Status : Unknown
Verified July 2019 by Monika Parshad-Asnani, The University of The West Indies.
Recruitment status was:  Recruiting
First Posted : July 11, 2019
Last Update Posted : July 11, 2019
Avicanna Inc
Information provided by (Responsible Party):
Monika Parshad-Asnani, The University of The West Indies

Brief Summary:
Pain is the most common component of the morbidity seen in sickle cell disease (SCD), and may be acute or chronic. It is most commonly acute and a result of the hallmark vaso-occlusive episodes of the disease. Many patients however suffer from chronic pain - defined as pain lasting over three months- with neuropathic pain being a component of chronic pain. Neuropathic pain significantly contributes to the chronicity and morbidity of pain in SCD patients, and is an inadequately managed complication. There is a paucity of literature covering this area, and it has never been examined in the Jamaican population. The main objective of this study is to determine the epidemiology of pain among Jamaicans with SCD, and determine the prevalence of chronic and neuropathic pain among these patients. A second objective is to validate, using gold-standard measures, screening tools to determine neuropathic pain among the study population. This cross-sectional study will investigate the prevalence of neuropathic pain and complications in a sample of persons with SCD in Jamaica aged 14 years and older, with a validation sub-study to be conducted on a random 20 percent of the sample. With improved diagnosis of neuropathic pain, clinicians may potentially improve the management of pain in SCD, as clinicians should be able to direct our treatment toward medications and non-pharmacological methods of pain relief that are more specific for neuropathic pain. All data will be de-identified and maintained in a secure database, with access limited to key personnel. There is very minimal risk to participants.

Condition or disease
Sickle Cell Disease Neuropathic Pain

Detailed Description:

All study participants will complete all the questionnaires provided, specifically the Adult Sickle Cell Quality of Life Measurement Information (ASCQ-Me), Leeds Assessment of Neuropathic Symptoms and Signs (LANSS), PainDETECT and Douleur Neuropathique 4 (DN4). All study participants will also have qualitative sensory testing and laboratory investigations done. Nerve conduction studies will only be done on a randomly selected 20 percent sub-study sample.

Laboratory investigations include sample of blood (~ 10 mls) will also be collected for the participants and analysed for Haemoglobin (steady state), white blood cells, and lactate dehydrogenase, percent reticulocytes. These are common markers of disease severity in SCD. Disease severity is one of the variables which will be used in the epidemiological description of the study population as well as in the statistical analysis of the data.

The Q-Sense will be used to conduct quantitative sensory tests. This allows specific degrees of heat/cold stimulation to assess sensation and pain thresholds to be applied and patients indicate at which degree they detect the stimuli and furthermore when it becomes painful, at each site. The results are then compared to known controls. Hypersensitivity and allodynia to thermal stimuli is considered diagnostic for neuropathic pain. The tests are considered safe in sickle cell patients and when tested have not resulted in any crisis. Patients may experience mild pain after the test, and therefore will be asked to take their regular analgesics immediately following the test.

Nerve conduction studies (NCS): A subset of participants identified with chronic or presumed neuropathic pain will, in addition to QST, receive a standard neurophysiological evaluation by nerve conduction studies to determine the presence/absence of a large fibre neuropathy, whether a focal mononeuropathy or diffuse polyneuropathy. Polyneuropathies will be characterized by process as either axonal or demyelinating, and by pattern as sensory, motor or sensorimotor, with comparisons to findings on QST.

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Study Type : Observational
Estimated Enrollment : 480 participants
Observational Model: Case-Only
Time Perspective: Cross-Sectional
Official Title: Neuropathic Pain in Jamaicans With Sickle Cell Disease
Estimated Study Start Date : July 15, 2019
Estimated Primary Completion Date : July 1, 2020
Estimated Study Completion Date : July 1, 2020

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. Prevalence of neuropathic pain among Jamaicans with Sickle cell disease (SCD) [ Time Frame: 1 year ]
    Determine among a clinic population of persons with SCD the prevalence of chronic and neuropathic pain

Secondary Outcome Measures :
  1. Effect of age on neuropathic pain [ Time Frame: 1 year ]
    Is age ( in years) correlated with the presence of neuropathic pain in persons with SCD

  2. Effect of sex on neuropathic pain [ Time Frame: 1 year ]
    Is sex (male or female) correlated with the presence of neuropathic pain in persons with SCD

Other Outcome Measures:
  1. Validation of common screening tool, PainDetect, in detection of neuropathic pain in persons with sickle cell disease [ Time Frame: 1 year ]
    Determine limits of agreement of detecting the presence of neuropathic pain using common screening tools with the gold standard measurement using quantitative sensory testing

Information from the National Library of Medicine

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Ages Eligible for Study:   14 Years and older   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
Using the Sickle Cell Unit (SCU) of the University of the West Indies patient management system, a computer generated random selection of the sample will be carried out from a sampling frame of all patients aged 14 years and older who are coded as 'alive' upon last visit, and who have had at least one visit to the SCU in the last 2 years. The recruitment of participants to satisfy the sample size of 528 participants will be stratified according to five age-sex categories i.e. male and female 14 - 24; 25 - 34; 35 - 44; 45 - 54; 55 + years old. Selected participants will be recruited by phone to attend a clinic appointment where informed consent will be ascertained.

Inclusion Criteria:

  • Patients aged 14 and older, of any sex and genotype
  • Informed consent/parental consent with child assent available
  • In well state at time of study

Exclusion Criteria:

  • Prior cerebrovascular accidents
  • Acute illness at time of recruitment
  • Current Pregnancy

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04015401

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Contact: Zachary Ramsay, MBBS 8769272471 zachary.ramsay@uwimona.edu.jm
Contact: Rachel Bartlett, RN 8769272471 bartlettrachel9223@gmail.com

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Caribbean Institute for Health Research Recruiting
Kingston, Jamaica, Kingston 7
Contact: Zachary Ramsay, MBBS    8768272471 ext 253    zachary.ramsay@uwimona.edu.jm   
Sponsors and Collaborators
The University of The West Indies
Avicanna Inc
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Principal Investigator: Monika Asnani, DM PhD Caribbean Institute for Health Research
Study Director: Zachary Ramsay, MBBS Caribbean Institute for Health Research
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Responsible Party: Monika Parshad-Asnani, Senior Lecturer, The University of The West Indies
ClinicalTrials.gov Identifier: NCT04015401    
Other Study ID Numbers: NP001
First Posted: July 11, 2019    Key Record Dates
Last Update Posted: July 11, 2019
Last Verified: July 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Monika Parshad-Asnani, The University of The West Indies:
Quantitative sensory testing
Additional relevant MeSH terms:
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Anemia, Sickle Cell
Anemia, Hemolytic, Congenital
Anemia, Hemolytic
Hematologic Diseases
Genetic Diseases, Inborn
Peripheral Nervous System Diseases
Neuromuscular Diseases
Nervous System Diseases
Neurologic Manifestations