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Clinical Trial Summary

Worldwide, over 2 billion people suffer from worm infections in developing countries. These infections are especially damaging to the health of children, resulting in both short-term and lifelong disability. Older children with worm infections are more likely to be stunted, underweight, vulnerable to other illnesses and perform poorly in school compared to non-infected children. Large-scale deworming programs in school-age children are therefore recommended by the World Health Organization (WHO). WHO also recommends deworming of preschool-age children (as of 12 months of age) in these areas; however, the benefits of deworming, especially in the 12-24 month age group, have been inadequately studied. This knowledge is urgently needed as studies show that all children have a similar potential for healthy growth and development, provided that appropriate nutrition and health interventions are given in the critical window of opportunity before the age of two.

Therefore, the investigators are proposing to undertake a randomized controlled trial to determine the effect of deworming program for improving growth and development in children between 12 and 24 months of age. Our results will provide solid rigorous evidence on if, when, and how often, deworming should be integrated into routine child health care packages provided by Ministries of Health in the 130 countries in the world where worm infections are endemic.


Clinical Trial Description

Worldwide, over 2 billion people suffer from worm infections (hookworm, Ascaris and Trichuris, collectively referred to as soil-transmitted helminths (STHs)) in developing countries. STHs contribute to the overwhelming burden of poverty and deprivation in areas where adverse health, social, economic, education and other related factors predominate. STH infection in childhood results in short-term and lifelong disability, including malnutrition (e.g. underweight, stunting and wasting), cognitive impairment and increased susceptibility to other infection, among others. Mass deworming programs in school-age children are recommended by the World Health Organization (WHO). WHO also recommends deworming of preschool children (as of 12 months of age) in endemic areas; however, the benefits of deworming on improving growth and development, especially in the 12-24 month age group, have been inadequately studied. This knowledge is crucial because, with appropriate nutrition and health interventions, all children have a similar potential for healthy growth and development, provided that such interventions occur in the critical window of opportunity before the age of two.

Therefore, this double-blind randomized controlled trial will assess the benefit of deworming (mebendazole), integrated into routine child health care visits in a highly STH-endemic area (Iquitos, Peru), on the primary outcome of weight gain. Timing, frequency and impact of deworming will be considered. A total of 1760 children will be recruited at their routine 12-month check-up visit and randomly assigned to one of four intervention groups: Group 1 will receive usual care and mebendazole (single dose 500 mg) at their 12-month visit and usual care and a placebo tablet at their 18-month visit; Group 2 will receive usual care and a placebo tablet at their 12-month visit and usual care and mebendazole at their 18-month visit; Group 3 will receive usual care and mebendazole at both their 12-month and 18-month visit; and Group 4 will receive usual care and placebo at both their 12-month and 18-month visit. Usual care will consist of age-appropriate immunizations, supplements and other Peruvian Ministry of Health-recommended interventions. All children will be followed up to their 24-month visit and all will be given mebendazole at that time.

Additional secondary outcomes include length gain, motor and cognitive development and STH prevalence and intensity.

Improving child health is a priority area in global health research and a focus of the Millennium Development Goals. Early preschool-age children are at the most critical stage of growth and development and have been neglected in deworming programs. It is anticipated that the results will inform evidence-based policy on the provision of an integrated health package for young children in endemic areas and ultimately contribute to the reduction of health inequities in this vulnerable group. ;


Study Design

Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment


Related Conditions & MeSH terms


NCT number NCT01314937
Study type Interventional
Source McGill University Health Center
Contact
Status Completed
Phase Phase 4
Start date September 2011
Completion date July 2013

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