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Ruling out early trimester pregnancy when implementing community-based deworming programs.

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This summary is machine-generated.

Identifying early pregnancy in women is crucial for community deworming programs. A simple questionnaire, asking "Are you pregnant?", achieved 100% positive predictive value, though a small false negative rate requires careful consideration.

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Area of Science:

  • Global health
  • Tropical medicine
  • Public health interventions

Background:

  • Deworming programs traditionally target children, but are expanding to women of reproductive age.
  • The World Health Organization advises deworming pregnant women only after the first trimester.
  • Accurate identification of early pregnancy is essential for safe and effective deworming programs.

Purpose of the Study:

  • To validate a concise questionnaire for deworming program managers.
  • To identify women in the early stages of pregnancy.
  • To screen out pregnant women from deworming initiatives when necessary.

Main Methods:

  • A questionnaire was administered to 1,203 adult women in the Peruvian Amazon.
  • Pregnancy tests were used as the gold standard for validation.
  • Regression analyses identified questions with high predictive value for early pregnancy.

Main Results:

  • The question 'Are you pregnant?' yielded a 100% positive predictive value.
  • This single question had a 1.9% false negative rate, missing 21 pregnant women.
  • Adding more questions reduced false negatives but increased false positives, with rates depending on question order and combination.

Conclusions:

  • Questionnaire design (number and order of questions) is key for identifying early pregnancy in deworming programs.
  • Local context and cultural factors should guide question selection.
  • Pregnancy tests can supplement questionnaires, balancing efficiency and accuracy for optimal deworming coverage in women of reproductive age.