Administrative information
Title {1} | EaveTubes for Control of Vector Borne Diseases in Côte d’Ivoire |
Trial registration {2a and 2b}. | ClinicalTrials.gov Identifier: NCT05736679. Registered February 10, 2023. |
Protocol version {3} | July 17, 2022 – Version 4.0 |
Funding {4} | This trial has received financial support from the Fund for Innovation in Development (Grant no. AFD CCII9O8 OIM), USAID Development Innovation Ventures (Grant no. 7200AA21FA00042), and the Achmea Foundation (Agreement 19 Dec 2022). |
Author details {5a} | Raphael N’Guessan, Vector Control Product Evaluation Centre/Institut Pierre Richet, Côte d’Ivoire Serge-Brice Assi, Vector Control Product Evaluation Centre/Institut Pierre Richet, Côte d’Ivoire Alphonsine Koffi, Vector Control Product Evaluation Centre/Institut Pierre Richet, Côte d’Ivoire Phamien Ludovic Ahoua Alou, Vector Control Product Evaluation Centre/Institut Pierre Richet, Côte d’Ivoire Anatole Mian, Vector Control Product Evaluation Centre/Institut Pierre Richet, Côte d’Ivoire Nicole L. Achee, University of Notre Dame, USA Benedicte Fustec, University of Notre Dame, USA John P. Grieco, University of Notre Dame, USA Fang Liu, University of Notre Dame, USA Santosh Kumar, University of Notre Dame, USA Matthew Noffsinger, University of Notre Dame, USA Ashley Hudson, University of Notre Dame, USA Tim W.R. Möhlmann, In2Care BV, Netherlands Marit Farenhorst, In2Care BV, Netherlands |
Name and contact information for the trial sponsor {5b} | In2Care BV Marijkeweg 22, 6709 PG Wageningen, The Netherlands Email: marit@in2care.org Tel: + 31 (0)317–769,018 |
Role of sponsor {5c} | Medical entomologists from In2Care BV gave advice on the study design and contributed to the protocol development, but will hold no authority over the study design, collection, management, analysis/ interpretation of data, writing of the report, or the decision to submit the report for publication. The trial funders had no role in and will hold no authority over the study design, collection, management, analysis/ interpretation of data, writing of the report, or the decision to submit the report for publication. Our grant agreements include a clause that the beneficiary remains free to use and/or publish the outcomes or results of the trial in public reports, publications or external communications. |
Introduction
Background and rationale {6a}
Objectives {7}
Main research question
Trial design {8}
Methods: participants, interventions, and outcomes
Study setting {9}
Eligibility criteria {10}
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≥ 80% of households (HHs) must be suitable for ET installation.
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≥ 70% of HHs willing to have ETs installed.
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No participation in the previous screening + ETs cRCT.
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Received standard pyrethroid-only LLINs (Permanet 2.0).
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100–300 HHs per village.
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≥ 2 km away from another village.
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< 80% of HHs suitable for ET installation
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< 70% of HHs willing to have ETs installed
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Villages being treated by IRS and/or new generation bed net campaigns
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Participation in previous Screening + ET cRCT
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< 100 and > 300 households per village
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< 2 km from another village
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HHs must be suitable for ET installation
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Provision of consent from heads of HH
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HH not suitable for ET installation (e.g., houses with poor quality thatch roofing or very large eaves or wall gaps, houses in substantial disrepair, unfinished houses under construction, poorly constructed houses)
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No provision of consent from heads of HH
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Children aged ≥ 6 months to < 8 years old at the time of enrollment (so all participants are under 10 years old for the duration of clinical follow-up).
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Provision of written, informed consent by parents/caregivers.
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Children must reside in villages enrolled in the study and in ETs-treated HHs.
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Hemoglobin at baseline of > 7 mg/dL.
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Children aged < 6 months or ≥ 8 years old at the time of enrollment
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No provision of written, informed consent by parents/caregivers for child participation
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Expected to be non-resident during a significant part of the transmission season
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Hemoglobin at baseline of ≤ 7 mg/dL, have a known chronic disease, or have signs of clinical decompensation
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Participation in another clinical trial investigating a drug, vaccine, medical device, or procedure
Who will take informed consent? {26a}
Additional consent provisions for collection and use of participant data and biological specimens {26b}
Interventions
Explanation for the choice of comparators {6b}
Intervention description {11a}
Criteria for discontinuing or modifying allocated interventions {11b}
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Withdrawal of consent by subject or parent of cohort subject.
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Cohort subject is non-resident for a significant portion of the malaria transmission season.
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Cohort subject is not available for follow-up visits (i.e., lost to follow-up).
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Subject experiences any clinically significant adverse events (AEs), laboratory abnormalities, or other medical conditions or situations such that continued participation in the study would not be in the best interest of the subject. This includes events that are not related to malaria or the ET intervention.
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Development of any exclusion criteria.
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Serious adverse event (SAE); any events that are life-threatening or result in death, events that result in hospitalization or prolongation of existing hospitalization, events that result in persistent or significant debilitation or incapacity.
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Participant’s consent withdrawal.
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Lost to follow-up: A “lost to follow-up” is any participant who completed all protocol-specific procedures up to the administration of the investigational product or intervention, but was then lost during the study period to any further follow-up, with no safety information and no endpoint data.
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Any other reason requiring a premature termination of the participant.
Strategies to improve adherence to interventions {11c}
Relevant concomitant care permitted or prohibited during the trial {11d}
Provisions for post-trial care {30}
Outcomes {12}
Participant timeline {13}
Study period | ||||
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Pre-trial | Baseline | Follow up | End of trial | |
Timepoint | T(Jan 2023–Feb 2023) | T(Mar 2023–Jun 2023) | T(Jul 2023–Jun 2025) | T(Jul 2025–Sept 2025) |
Ramp-up | ||||
Village selection | X | |||
Community engagement | X | |||
Census | X | |||
Village randomization and allocation | X | |||
Enrollment | ||||
Informed Consent | X | |||
Screening | X | |||
ET installation | X | |||
Distribution of LLINs | X | |||
Baseline prevalence study | X | |||
Parasite clearance | X | |||
Intervention | ||||
Epidemiological monitoring (active case detection) | X | |||
Entomological monitoring | X | |||
Intervention monitoring and replacements | X | |||
Assessments | ||||
Baseline Analysis | X | |||
Final Analysis | X |
Sample size {14}
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True PE/Minimum effect size = 35%
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Baseline first-time malaria infection hazard rate = 1.5 cases of falciparum malaria per person-year (conservative estimate based on control arm data from first SET cRCT)
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Coefficient of variation (k) = 40% (based on first SET cRCT)
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Loss to follow-up (LTFU) rate = 20%
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Monitoring = 2 years to capture 2 peak transmission seasons
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One interim analysis for efficacy and non-binding futility with the O’Brien-Fleming error spending function when 50% information is collected