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Units of Measure

Phil B. Fontanarosa and Stacy Christiansen

in AMA Manual of Style: A Guide for Authors and Editors (10th edition)

Print Publication Year: 
2007
Published Online: 
2009
eISBN: 
9780195382846
DOI: 
10.1093/jama/9780195176339.003.0018
Item type: 
chapter
ISBN: 
9780195176339
The presentation of quantitative scientific information is an integral component of biomedical publication. Accurate communication of scientific knowledge and presentation of numerical data ... More

SI Units

Phil B. Fontanarosa and Stacy Christiansen

in AMA Manual of Style: A Guide for Authors and Editors (10th edition)

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.021.256
Item type: 
section
The International System of Units (Le Système International d'Unités or SI) represents a modified version of the metric system that has been established by international agreement and currently is the ... More

Expressing Unit Names and Symbols

Phil B. Fontanarosa and Stacy Christiansen

in AMA Manual of Style: A Guide for Authors and Editors (10th edition)

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.021.257
Item type: 
section
The SI includes conventions for expressing unit names and abbreviations (often referred to as symbols) and for displaying them in text.The SI unit names are written lowercase (eg, kilogram) when spelled ... More
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Format, Style, and Punctuation

Phil B. Fontanarosa and Stacy Christiansen

in AMA Manual of Style: A Guide for Authors and Editors (10th edition)

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.021.258
Item type: 
section
The format, style, and punctuation guidelines generally apply for SI reporting but also are used for reporting most values in conventional units.SI reporting style uses exponents rather than certain abbreviations, ... More
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Conventional Units and SI Units in JAMA and the Archives Journals

Phil B. Fontanarosa and Stacy Christiansen

in AMA Manual of Style: A Guide for Authors and Editors (10th edition)

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.021.260
Item type: 
section
In the United States, most physicians and other health care professionals use conventional units for most commonly encountered clinical measurements (eg, blood pressure), and most clinical laboratories ... More

Base Units

Phil B. Fontanarosa and Stacy Christiansen

in AMA Manual of Style: A Guide for Authors and Editors (10th edition)

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.022.540
Item type: 
section
The SI is based on 7 fundamental units (base units) that refer to 7 basic quantities of measurement (see the tabulation below). These units form the structure from which other measurement quantities are ... More

Derived Units

Phil B. Fontanarosa and Stacy Christiansen

in AMA Manual of Style: A Guide for Authors and Editors (10th edition)

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.022.541
Item type: 
section
Other SI measurement quantities are referred to as derived units and are expressed as products or quotients of the 7 base units. Certain derived SI units have special names and symbols and may be used ... More

Prefixes

Phil B. Fontanarosa and Stacy Christiansen

in AMA Manual of Style: A Guide for Authors and Editors (10th edition)

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.022.542
Item type: 
section
Prefixes are combined with base units and derived units to form multiples of SI units. The factors designated by prefixes are powers of 10, and most prefixes involve exponents that are simple multiples ... More

Capitalization

Phil B. Fontanarosa and Stacy Christiansen

in AMA Manual of Style: A Guide for Authors and Editors (10th edition)

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.022.544
Item type: 
section
The SI unit names are written lowercase (eg, kilogram) when spelled out, except for Celsius (as in “degrees Celsius”), which is capitalized. Abbreviations or symbols for SI units also are written lowercase, ... More

Products and Quotients of Unit Symbols

Phil B. Fontanarosa and Stacy Christiansen

in AMA Manual of Style: A Guide for Authors and Editors (10th edition)

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.022.545
Item type: 
section
The product of 2 or more SI units should be indicated by a space between them or by a raised multiplication dot. The multiplication dot must be positioned properly to distinguish it from a decimal point, ... More

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