A Phase 4 interventional study of Mebendazole in Hookworm Infections, sponsored by PATH. Withdrawn at 1 site in Ghana. Open to participants aged 6 Years to 18 Years. Per ClinicalTrials.gov, last updated 2017-11-17.
Sponsored by PATH · Phase 4, Interventional, and Treatment
The Ghana study will hypothesize that both the multiple dose and single dose of mebendazole will achieve effective cure rates against hookworm among children and adolescents. This study is intended to be a pilot study for a planned Phase 3 registration trial of a new drug for hookworm, tribendimidine.
This study will determine the Cure Rates (CRs) of mebendazole regimens to be used as comparator drug regimens in the future pivotal trial of tribendimidine and will provide evidence of the efficacy and safety of mebendazole among children and adolescents infected with hookworm in Ghana. Children and adolescents bear a large burden of morbidity from hookworm infection, so building the evidence base for effective treatments in this population has important public health implications in Ghana and other endemic settings.
39 studies on the registry are indexed under Hookworm Infections; 5 are open to participants now.
Browse Hookworm Infections studies →PATH is the lead sponsor of 113 studies on the registry; 7 are open to participants now.
Of its 10 completed or terminated interventional studies of FDA-regulated products, 10 (100%) have results posted.
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All participants must meet all of the following inclusion criteria:
Exclusion Criteria
Participants must meet none of the following exclusion criteria to be eligible for this study:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Assess the efficacy (Cure Rate/CR) and safety of 100 mg dose regimen of mebendazole in children aged 6 to 18 years, inclusive, infected with hookworm.
Drug: Mebendazole
Assess the efficacy (Cure Rate/CR) and safety of 500 mg dose regimen of mebendazole in children aged 6 to 18 years, inclusive, infected with hookworm.
Drug: Mebendazole
Participants will be randomized using a 1:1 ratio to one of the two arms. Study participants eligible for treatment will be randomly assigned to one of the two treatment arms using a computer-generated stratified block randomization code.
Also known as: Vermox
Cure Rate (CR) against hookworm, as determined by Kato Katz.
To determine point estimates for the efficacy of two mebendazole regimens: (i) 100 mg solid tablets twice daily for three days, and (ii) single dose of 500 mg solid tablets in participants aged 6 to 18 years infected with hookworm. The CR will be calculated as the percentage of children and adolescents (all hookworm egg-positive at enrollment) who are egg negative 20 days after treatment. The CRs will be tabulated by mebendazole dose regimen received, along with their corresponding 95% CIs.
Time frame: 20 days
Egg reduction rate (ERR), based on geometric mean, against hookworm
In a simple analysis, the study will estimate a risk ratio between CRs by using log binomial regression. Baseline characteristics will be assessed by arm to determine any imbalance between the two randomization arms. Any factor (e.g., age, sex, school, weight, height, baseline hookworm infection intensity) out of balance at baseline will be adjusted for in the analyses. Sensitivity analyses will be conducted which will consider all participants with missing endpoint data as treatment failure or all as treatment success to test whether the results (of the CR comparison) are sensitive to potential differences in loss to follow-up.
Time frame: 20 days
CR and ERR against Ascaris lumbricoides and Trichuris trichiura
Determine the ERR in the two treatment arms; EPG will be assessed by adding up the egg counts from the Kato-Katz thick smears and multiplying this number by twenty-four. The ERR will be calculated (ERR = (1-(mean egg count at follow-up/mean egg count at baseline))\*100). Geometric mean egg counts will be calculated for the different treatment arms before and after treatment to assess the corresponding ERRs. The bootstrap resampling method with 5,000 replicates will be used to calculate 95% CIs for ERRs and the difference between the ERRs. Analyses of mebendazole efficacy against concomitant STHs will proceed similarly to those conducted for hookworm.
Time frame: 20 days
Adverse Events
For the safety objective, the probability of observing zero, one or more, and two or more solicited AEs among the 150 subjects in each treatment arm given a true event rate. For example, if the true rate of an AE among subjects receiving single dose mebendazole is 1% then the probability we will see 1 or more subjects with this event is 78%.
Time frame: Through 20 days of follow-up
Sensitivity of Kato-Katz and PCR for hookworm infection detection
Compare the sensitivity of Kato-Katz to quantitative polymerase chain reaction (PCR) assays among participants at day 20 of follow-up. As there is no true gold standard for hookworm diagnosis, we will consider individuals as "true" positives if they are identified as positive by PCR or Kato-Katz. This assumes no false positives for either diagnostic technique. While PCR has higher sensitivity than microscopy in general, microscopy has been noted to have high specificity. The study will therefore avoid discounting as "true" positives those who test negative by PCR but positive by microscopy and conduct an inter-method reliability study to separately compare hookworm and other STH diagnoses by PCR or the pooled microscopy in the full sample (N= 300) with the pooled (Kato-Katz or PCR positive) gold standard. Specificity cannot be calculated, as both diagnostic methods are contained within the pooled gold standard.
Time frame: Up to 14 weeks following Day 20
Prevalence of hookworm genetic resistance markers
Determine the prevalence of hookworm genetic resistance markers among participants at day 20 of follow-up. The conditional prevalence is defined as the proportion of individuals who have a disease subtype among those who test positive for the disease. All participants identified as positive for hookworm by PCR at day 20 will be considered hookworm positive.
Time frame: Up to 14 weeks following Day 20
Distribution of hookworm species among participants
Determine the distribution of hookworm species among participants at baseline. All participants identified as positive for hookworm by PCR at baseline will be considered hookworm positive. The conditional prevalence(s) will be calculated as follows, pooled and separately for each arm.
Time frame: Up to 14 weeks following Day 20
Plan to share: Undecided — The final results of this study will be published in a scientific journal and presented at scientific conferences. Any publication, lecture, and manuscripts of the findings of this study by any individual involved with the study will be governed by the procedure outlined in the Clinical Trial Agreement. Within any presentation or publication, confidentiality of individual subjects will be maintained, with identification by subject code number and initials, if applicable. A summary of study conclusions will be shared with the local community.
No publications or documents are linked to this record.
Start is estimated for Sep 2017; primary completion for Dec 2017, 3 months later.
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This study is withdrawn, as verified in Nov 2017. You cannot join it, but the record below documents what was studied.
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Studies of the drug tested here: Mebendazole