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Effects of nutritional supplements on the re-infection rate of soil-transmitted helminths in school-age children: A systematic review and meta-analysis

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  • Aisha Ummi Jibrin Isah
  • Obinna Ikechukwu Ekwunife
  • Izuchukwu Loveth Ejie
  • Olena Mandrik

Abstract

Background: The effect of nutritional supplements on the re-infection rate of species-specific soil-transmitted helminth infections in school-aged children remains complex and available evidence on the subject matter has not been synthesized. Methods: The review included randomised controlled trials (RCTs) and cluster RCTs investigating food supplements on school-aged children between the age of 4–17 years. A search for RCTs was conducted on eight databases from inception to 12th June 2019. Cochrane Risk of Bias tool was used to assess the risk of bias in all included studies. Meta-analysis and narrative synthesis were conducted to describe and analyze the results of the review. Outcomes were summarized using the mean difference or standardized mean difference where appropriate. Results: The search produced 1,816 records. Six studies met the inclusion criteria (five individually RCTs and one cluster RCT). Four studies reported data on all three STH species, while one study only reported data on Ascaris lumbricoides infections and the last study reported data on only hookworm infections. Overall, the risk of bias in four individual studies was low across most domains. Nutritional supplementation failed to statistically reduce the re-infection rates of the three STH species. The effect of nutritional supplements on measures of physical wellbeing in school-aged children could not be determined. Conclusions: The findings from this systematic review suggest that nutritional supplements for treatment of STH in children should not be encouraged unless better evidence emerges. Conclusion of earlier reviews on general populations may not necessarily apply to children since children possibly have a higher re-infection rate.

Suggested Citation

  • Aisha Ummi Jibrin Isah & Obinna Ikechukwu Ekwunife & Izuchukwu Loveth Ejie & Olena Mandrik, 2020. "Effects of nutritional supplements on the re-infection rate of soil-transmitted helminths in school-age children: A systematic review and meta-analysis," PLOS ONE, Public Library of Science, vol. 15(8), pages 1-20, August.
    • Handle: RePEc:plo:pone00:0237112
    DOI: 10.1371/journal.pone.0237112
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    References listed on IDEAS

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