AMA vs Vancouver: Medical Citation Style Guide
AMA and Vancouver are both numbered citation styles used in medical writing, but they have important differences in formatting. Understanding these distinctions helps medical students, researchers, and healthcare professionals cite sources correctly for different journals and publications.
Quick Comparison: AMA vs Vancouver
AMA Style
- ✓ Superscript numbers1
- ✓ American Medical Association
- ✓ JAMA and AMA journals
- ✓ Specific formatting rules
- ✓ Full journal names
- ✓ 11th edition (2020)
Vancouver Style
- ✓ Bracketed [1] or superscript1
- ✓ International Committee of Medical Journal Editors
- ✓ Most international medical journals
- ✓ ICMJE recommendations
- ✓ Abbreviated journal names (NLM)
- ✓ Updated regularly
Understanding the Relationship
Both AMA and Vancouver are numbered citation systems designed for medical literature, but they evolved separately:
- Vancouver: Developed in 1978 by the International Committee of Medical Journal Editors (ICMJE) at a meeting in Vancouver
- AMA: Developed by the American Medical Association for its publications, documented in the AMA Manual of Style
Key Differences: AMA vs Vancouver
1. Citation Format in Text
| Feature | AMA | Vancouver |
|---|---|---|
| Primary format | Superscript 1 | Bracketed [1] or superscript 1 |
| Punctuation | After punctuation1 | Varies by journal |
| Example | Recent studies show benefits.1 | Recent studies show benefits [1] or 1 |
| Multiple sources | 1-3 | [1-3] or 1-3 |
2. Journal Name Format
| Aspect | AMA | Vancouver |
|---|---|---|
| Journal names | Full journal names (no abbreviation) | Abbreviated (NLM style) |
| Italics | Italicized journal names | Not italicized |
| Example | Journal of the American Medical Association | JAMA |
3. Author Names
| Element | AMA | Vancouver |
|---|---|---|
| Format | Lastname Initials (no periods or commas) | Lastname Initials (no periods) |
| Separator | Commas between authors | Commas between authors |
| Example | Smith JA, Brown BC, Jones KL | Smith JA, Brown BC, Jones KL |
| Many authors | List all authors | First 6, then "et al" |
4. Reference List Format
| Feature | AMA | Vancouver |
|---|---|---|
| Numbering | 1. (number with period) | 1. (number with period) |
| Title case | Sentence case | Sentence case |
| Year format | Year;Volume(Issue):Pages | Year;Volume(Issue):Pages |
| Punctuation | Periods after major elements | Periods after major elements |
Journal Article Examples
Standard Journal Article
AMA Style:
1. Smith JA, Johnson BC, Williams KL. Advances in cardiovascular imaging techniques. Journal of the American College of Cardiology. 2024;83(4):521-533. doi:10.1016/j.jacc.2023.12.015
Vancouver Style:
1. Smith JA, Johnson BC, Williams KL. Advances in cardiovascular imaging techniques. J Am Coll Cardiol. 2024;83(4):521-33. doi: 10.1016/j.jacc.2023.12.015.
Article with Many Authors
AMA Style (lists all):
2. Brown AA, Chen BC, Davis CD, Evans DE, Garcia EF, Harris FG, Ibrahim GH, Jones HI. Large-scale clinical trial results. New England Journal of Medicine. 2024;390(5):445-458.
Vancouver Style (uses et al after 6):
2. Brown AA, Chen BC, Davis CD, Evans DE, Garcia EF, Harris FG, et al. Large-scale clinical trial results. N Engl J Med. 2024;390(5):445-58.
Book Citations
AMA Style:
3. Kumar V, Abbas AK, Aster JC. Robbins and Cotran Pathologic Basis of Disease. 10th ed. Elsevier; 2021.
Vancouver Style:
3. Kumar V, Abbas AK, Aster JC. Robbins and Cotran pathologic basis of disease. 10th ed. Philadelphia: Elsevier; 2021.
When to Use AMA vs Vancouver
Use AMA Style When:
- Publishing in JAMA journals: JAMA, JAMA Internal Medicine, JAMA Surgery, etc.
- AMA-affiliated publications: American Medical Association journals and publications
- Your institution specifies AMA: Some medical schools require AMA for theses
- Writing for US-based journals: Some American medical journals prefer AMA
- Following AMA Manual of Style: When specifically instructed to use this manual
Use Vancouver Style When:
- Publishing in most medical journals: The majority of biomedical journals use Vancouver/ICMJE
- International publications: Vancouver is the international standard
- Following ICMJE guidelines: When journals specify ICMJE or Vancouver
- Clinical research: Most clinical trial publications use Vancouver
- BMJ, Lancet, BMC journals: These major publishers use Vancouver
- PubMed compatibility: Vancouver formatting aligns with PubMed/MEDLINE standards
Common Journal Abbreviations (Vancouver)
Vancouver uses NLM (National Library of Medicine) abbreviations. Here are common examples:
| Full Journal Name | NLM Abbreviation |
|---|---|
| The New England Journal of Medicine | N Engl J Med |
| Journal of the American Medical Association | JAMA |
| The Lancet | Lancet |
| British Medical Journal | BMJ |
| Annals of Internal Medicine | Ann Intern Med |
| Journal of Clinical Oncology | J Clin Oncol |
Find abbreviations at: NLM Catalog
Electronic Sources
Online Journal Article
AMA Style:
4. Chen L, Park HJ. Digital health interventions for chronic disease. Journal of Medical Internet Research. 2024;26(1):e45678. doi:10.2196/45678
Vancouver Style:
4. Chen L, Park HJ. Digital health interventions for chronic disease. J Med Internet Res. 2024;26(1):e45678. doi: 10.2196/45678.
Website
AMA Style:
5. Centers for Disease Control and Prevention. Heart disease facts. Updated December 15, 2023. Accessed January 20, 2024. https://www.cdc.gov/heartdisease/facts.htm
Vancouver Style:
5. Centers for Disease Control and Prevention. Heart disease facts [Internet]. Atlanta (GA): CDC; c2023 [updated 2023 Dec 15; cited 2024 Jan 20]. Available from: https://www.cdc.gov/heartdisease/facts.htm
Special Considerations
DOI Format
- AMA: doi:10.1000/journal.2024.12345 (no "https://doi.org/")
- Vancouver: doi: 10.1000/journal.2024.12345 (space after "doi:")
Publisher Location
- AMA: Publisher name; Year (no location)
- Vancouver: Location: Publisher; Year (includes city)
Page Number Abbreviation
- AMA: Full page range: 123-133
- Vancouver: Abbreviated when possible: 123-33
Detailed Comparison Table
| Feature | AMA | Vancouver |
|---|---|---|
| Authority | American Medical Association | International Committee of Medical Journal Editors |
| Manual | AMA Manual of Style (11th ed., 2020) | ICMJE Recommendations (updated regularly) |
| Geographic use | Primarily US | International standard |
| Journal adoption | JAMA journals, some US journals | Majority of biomedical journals worldwide |
| Manual cost | Purchase required (~$80) | Free online (ICMJE website) |
| Update frequency | New editions every ~10 years | Updated annually as needed |
Similarities Between AMA and Vancouver
Despite their differences, AMA and Vancouver share many features:
- Both use numbered citations in order of appearance
- Both list references in citation order (not alphabetically)
- Both use similar author name formats
- Both use sentence case for titles
- Both are designed specifically for medical literature
- Both emphasize brevity and standardization
- Both include DOIs when available
Common Mistakes to Avoid
- Abbreviating journals in AMA: AMA uses full journal names, not abbreviations
- Wrong abbreviations in Vancouver: Must use NLM abbreviations, not random ones
- Italicizing in Vancouver: Journal names are not italicized in Vancouver
- Wrong author limits: AMA lists all authors, Vancouver uses et al. after 6
- Mixing styles: Never combine AMA and Vancouver in one paper
- Forgetting location in Vancouver books: Vancouver requires publisher city
Tools and Resources
Official Resources
- AMA: AMA Manual of Style website and manual
- Vancouver: ICMJE.org (free recommendations)
Finding Journal Abbreviations
- NLM Catalog (www.ncbi.nlm.nih.gov/nlmcatalog)
- PubMed journal database
- Reference management software databases
Citation Management Software
Zotero, Mendeley, EndNote, and Papers all support both AMA and Vancouver styles. Ensure you select the correct style for your target journal.
Frequently Asked Questions
Is Vancouver more common than AMA?
Yes, globally. Vancouver/ICMJE is the international standard for most biomedical journals. AMA is primarily used by JAMA and affiliated journals.
Can I convert between AMA and Vancouver easily?
The main differences are journal name format (full vs. abbreviated) and some punctuation. With reference management software, conversion is relatively straightforward.
Which style should I learn first?
Vancouver is more widely used internationally. However, check your institution's or target journal's requirements first.
Are the in-text citations the same?
Nearly identical—both use numbers corresponding to references. The main difference is AMA prefers superscripts while Vancouver allows brackets or superscripts.
Do I need to buy the AMA manual?
If you're publishing extensively in JAMA journals or your program requires it, yes. For Vancouver, the ICMJE recommendations are free online.
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