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Public healthDiscussion postEpidemiology

Where Asthma Is Least Prevalent: Discussion Guide

The question asks where asthma is least common, which is the harder direction. Then it asks for a hypothesis, and a hypothesis has to be testable rather than plausible.

Editorial process

Last reviewed · August 16, 2026

01

Find where, then explain why — the hypothesis is the graded half

Two things make this short prompt harder than it looks. The first is direction: asking where asthma is least prevalent sends you to comparative international data rather than to the national statistics that dominate search results. The International Study of Asthma and Allergies in Childhood remains the standard source for that comparison, and it documented a striking pattern — prevalence varying by more than an order of magnitude between countries, with the lowest rates concentrated in parts of Eastern Europe, Asia and rural Africa, and the highest in English-speaking high-income countries. Give a figure and a source rather than naming a region vaguely, and note the methodological caveat that makes this data hard: low measured prevalence can reflect under-diagnosis and limited access to spirometry rather than genuinely less disease, and saying so is itself a mark of reading carefully. Check whether your source measured reported symptoms or clinician diagnoses, because the two give different maps.

The second half asks for a hypothesis, which has a specific meaning: a proposed explanation that could be tested and could turn out to be wrong. 'Different environments' is not one. The hygiene hypothesis is the obvious candidate and it is genuinely testable — early childhood exposure to microbial diversity, farm animals and endotoxin shapes immune development away from allergic sensitisation, which predicts that rural farming children should have lower rates than urban children in the same country, and that migrants should converge on their destination's rate over time. Both predictions have been examined. Alternatives worth naming include outdoor air pollution and traffic exposure, indoor allergen load in sealed modern housing, obesity, and dietary change. Pick one, state the mechanism, and then state what evidence would count against it — that last sentence is what makes it a hypothesis rather than an opinion. Say which alternative you find second most convincing, and why it comes second.

Likely learning objectives

Inferred from the brief — check these against your own rubric.

  • 01
    Locate international comparative prevalence data rather than national statistics.
  • 02
    Recognise under-diagnosis as a confounder in prevalence comparisons.
  • 03
    State a hypothesis in testable form.
  • 04
    Identify evidence that would count against your own explanation.
Assignment instructionsQuoted verbatim

Read the full question

Review every instruction before using the planning guidance that follows.

Find out where in the world asthma is least prevalent. Create a hypothesis as to why this may be so. Use complete sentences in your response and appropriately cite the source(s) of your answer using APA format. You must use at least 2 sources (your textbook can be one) to support your answer. References Asher, M.I., et al. 1998. Worldwide variation in the prevalence of asthma symptoms: The international study of asthma and allergies in childhood. European Respiratory Journal 12:315–35. Doyle, Roger. 2000. Asthma worldwide. Scientific American, June, 30. http://www.mayoclinic.com http://www.aaaai.org http://www.mhhe.com/biosci/genbio/casestudies/asthma.mhtml
Course-wide instructions that accompany this question

You must proofread your paper. But do not strictly rely on your computer’s spell-checker and grammar-checker; failure to do so indicates a lack of effort on your part and you can expect your grade to suffer accordingly. Papers with numerous misspelled words and grammatical mistakes will be penalized. Read over your paper – in silence and then aloud – before handing it in and make corrections as necessary. Often it is advantageous to have a friend proofread your paper for obvious errors. Handwritten corrections are preferable to uncorrected mistakes. Discussion: Asthma is least prevalent. Use a standard 10 to 12 point (10 to 12 characters per inch) typeface. Smaller or compressed type and papers with small margins or single-spacing are hard to read. It is better to let your essay run over the recommended number of pages than to try to compress it into fewer pages. Likewise, large type, large margins, large indentations, triple-spacing, increased leading (space between lines), increased kerning (space between letters), and any other such attempts at “padding” to increase the length of a paper are unacceptable, wasteful of trees, and will not fool your professor. The paper must be neatly formatted, double-spaced with a one-inch margin on the top, bottom, and sides of each page. When submitting hard copy, be sure to use white paper and print out using dark ink. If it is hard to read your essay, it will also be hard to follow your argument. ADDITIONAL INSTRUCTIONS FOR THE CLASS Discussion Questions (DQ) Initial responses to the DQ should address all components of the questions asked, include a minimum of one scholarly source, and be at least 250 words. Successful responses are substantive (i.e., add something new to the discussion, engage others in the discussion, well-developed idea) and include at least one scholarly source. One or two sentence responses, simple statements of agreement or “good post,” and responses that are off-topic will not count as substantive. Substantive responses should be at least 150 words. I encourage you to incorporate the readings from the week (as applicable) into your responses. Weekly Participation Your initial responses to the mandatory DQ do not count toward participation and are graded separately. In addition to the DQ responses, you must post at least one reply to peers (or me) on three separate days, for a total of three replies. Participation posts do not require a scholarly source/citation (unless you cite someone else’s work). Part of your weekly participation includes viewing the weekly announcement and attesting to watching it in the comments. These announcements are made to ensure you understand everything that is due during the week. APA Format and Writing Quality Familiarize yourself with APA format and practice using it correctly. It is used for most writing assignments for your degree. Visit the Writing Center in the Student Success Center, under the Resources tab in LoudCloud for APA paper templates, citation examples, tips, etc. Points will be deducted for poor use of APA format or absence of APA format (if required). Cite all sources of information! When in doubt, cite the source. Paraphrasing also requires a citation. I highly recommend using the APA Publication Manual, 6th edition. Use of Direct Quotes I discourage overutilization of direct quotes in DQs and assignments at the Masters’ level and deduct points accordingly. As Masters’ level students, it is important that you be able to critically analyze and interpret information from journal articles and other resources. Simply restating someone else’s words does not demonstrate an understanding of the content or critical analysis of the content. It is best to paraphrase content and cite your source. LopesWrite Policy For assignments that need to be submitted to LopesWrite, please be sure you have received your report and Similarity Index (SI) percentage BEFORE you do a “final submit” to me. Once you have received your report, please review it. This report will show you grammatical, punctuation, and spelling errors that can easily be fixed. Take the extra few minutes to review instead of getting counted off for these mistakes. Review your similarities. Did you forget to cite something? Did you not paraphrase well enough? Is your paper made up of someone else’s thoughts more than your own? Visit the Writing Center in the Student Success Center, under the Resources tab in LoudCloud for tips on improving your paper and SI score. Late Policy The university’s policy on late assignments is 10% penalty PER DAY LATE. This also applies to late DQ replies. Please communicate with me if you anticipate having to submit an assignment late. I am happy to be flexible, with advance notice. We may be able to work out an extension based on extenuating circumstances. If you do not communicate with me before submitting an assignment late, the GCU late policy will be in effect. I do not accept assignments that are two or more weeks late unless we have worked out an extension. As per policy, no assignments are accepted after the last day of class. Any assignment submitted after midnight on the last day of class will not be accepted for grading. Communication Communication is so very important. There are multiple ways to communicate with me: Questions to Instructor Forum: This is a great place to ask course content or assignment questions. If you have a question, there is a good chance one of your peers does as well. This is a public forum for the class. Individual Forum: This is a private forum to ask me questions or send me messages. This will be checked at least once every 24 hours. Discussion: Asthma is least prevalent.

02

Turn the brief into deliverables

  1. 01
    A named region or country with the lowest prevalence, with a figure.
  2. 02
    A source for that figure.
  3. 03
    A hypothesis stated as a testable mechanism.
  4. 04
    Predictions the hypothesis makes.
  5. 05
    At least two sources in APA format.
03

Locate the low-prevalence region, then propose a mechanism

01

Where prevalence is lowest

Name the regions and give comparative figures.

02

The measurement caveat

Note that low measured prevalence may reflect under-diagnosis.

03

The hypothesis

Propose a mechanism for the geographic pattern.

04

What it predicts

Derive testable predictions from the mechanism.

05

Alternatives and what would refute it

Name competing explanations and disconfirming evidence.

04

Where international asthma prevalence data lives

Recommended databases

  • Global Initiative for Asthma
  • PubMed Central
  • MedlinePlus
  • World Health Organization

Search sequence

  1. 1.
    Search for international comparative prevalence rather than country statistics.
  2. 2.
    Find the migration studies, which are the strongest test of the hygiene hypothesis.
  3. 3.
    Check whether the data source measured symptoms or diagnoses; they differ.
  4. 4.
    Look for at least one source that argues against your chosen mechanism.
05

Reference shortlist

These are authoritative starting points, not a ready-made bibliography. A qualified reviewer must confirm that each source fits the assignment and supports the claim beside which it is cited.

Nothing here is cleared for citation until you have read it.

  1. 01

    Reports

    Global Initiative for Asthma · 2025

    The global strategy reports, with international prevalence and its variation.

  2. 02

    Asthma in Children

    MedlinePlus, National Library of Medicine · 2024

    Childhood asthma background, which is where the comparative data is strongest.

  3. 03

    2020 Focused Updates to the Asthma Management Guidelines

    National Heart, Lung, and Blood Institute, NIH · 2020

    National guidance, useful for the diagnostic criteria that determine measured prevalence.

  4. 04

    Call for the alignment of Medicare Part D formularies with clinical treatment guidelines for asthma

    Journal of Managed Care & Specialty Pharmacy · 2025

    How diagnosis and treatment access shape recorded asthma burden.

06

Review before submission

Common mistakes

  • Reporting where asthma is most prevalent, which is the easier data to find.
  • Offering 'different environments' as a hypothesis.
  • Ignoring under-diagnosis as an alternative explanation for low measured prevalence.
  • Citing no source for the prevalence claim itself.

Submission checklist

  • Have you given a figure and a source for the low-prevalence region?
  • Is your hypothesis stated as a mechanism that could be wrong?
  • Did you mention diagnostic access as a confounder?
  • Are there at least two sources in APA format?

Use this guide to plan and review your own work. Follow your institution's rules and read our academic-integrity policy.

Written by

Aaron Bishop

MA, Education

assignment interpretation and research-methods coaching across disciplines

Aaron leads the EssayCrackers editorial desk. He works on how assignment briefs are read — what a rubric is actually asking for, and where students most often answer a different question than the one set.

Reviewed by

Dr. Nathan Cole

PhD, Rhetoric & Composition

Argumentation and thesis development

Nathan teaches first-year composition and directs a university writing center. He reviews EssayCrackers guides for argumentative soundness and citation accuracy.

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