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Zinc supplements for preventing otitis media.

Anjana Gulani1, Harshpal S Sachdev

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|June 30, 2014
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This summary is machine-generated.

Zinc supplements show mixed results for preventing otitis media (middle ear infections) in young children. While some evidence suggests a benefit in malnourished children, more research is needed for healthy populations.

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Area of Science:

  • Public Health
  • Pediatrics
  • Nutritional Science

Background:

  • Otitis media, a common middle ear infection, causes significant long-term hearing loss globally, particularly in low-income countries.
  • It disproportionately affects young children, leading to millions of cases of hearing impairment worldwide.
  • Given zinc's role in preventing pneumonia, its potential in preventing otitis media warrants investigation.

Purpose of the Study:

  • To evaluate the efficacy of zinc supplements in preventing otitis media across diverse age groups.
  • To synthesize evidence from randomized, placebo-controlled trials on zinc supplementation for otitis media prevention.

Main Methods:

  • Systematic review of randomized, placebo-controlled trials identified through searches of CENTRAL, MEDLINE, and EMBASE databases.
  • Data extraction and analysis by two independent reviewers, summarizing results using risk ratios and mean differences.
  • Included trials required zinc supplementation at least weekly for a minimum of one month.

Main Results:

  • Twelve trials involving 6820 participants were included; 10 provided outcome data.
  • In healthy children from low-income communities, two trials found no significant difference in otitis media incidence, while one showed a reduced incidence rate with zinc.
  • A small trial indicated a potential benefit of zinc for reducing the number of otitis media episodes in infants with severe malnutrition; zinc supplements were generally well-tolerated with minor adverse events like vomiting.

Conclusions:

  • Evidence regarding zinc supplementation's effectiveness in preventing otitis media in healthy children under five in low- and middle-income countries is inconclusive.
  • A small trial suggests potential benefits for zinc in children with severe malnutrition, but this finding requires cautious interpretation due to limited data.