Abbreviations
Phil B. Fontanarosa and Stacy Christiansen
in AMA Manual of Style: A Guide for Authors and Editors (10th edition)
Most units of measure are abbreviated when used with numerals or in a virgule construction. Certain units of measure should be spelled out at first mention, with the abbreviated form in parentheses. ...
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Base Units
Phil B. Fontanarosa and Stacy Christiansen
in AMA Manual of Style: A Guide for Authors and Editors (10th edition)
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 ...
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Beginning of Sentence, Title, Subtitle
Phil B. Fontanarosa and Stacy Christiansen
in AMA Manual of Style: A Guide for Authors and Editors (10th edition)
A unit of measure that follows a number at the beginning of a sentence, title, or subtitle should not be abbreviated, even though the same unit of measure is abbreviated if it appears elsewhere in ...
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Capitalization
Phil B. Fontanarosa and Stacy Christiansen
in AMA Manual of Style: A Guide for Authors and Editors (10th edition)
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 ...
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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)
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 ...
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Currency
Phil B. Fontanarosa and Stacy Christiansen
in AMA Manual of Style: A Guide for Authors and Editors (10th edition)
Amounts of money in US, Canadian, and British currency are expressed as a decimal number or whole number preceded by the symbol for the unit of measure for the currency.The cost-effectiveness ...
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Decimal Format
Phil B. Fontanarosa and Stacy Christiansen
in AMA Manual of Style: A Guide for Authors and Editors (10th edition)
The decimal format is recommended for numbers used with units of measure. Numerical values less than 1 require placement of 0 before the decimal marker. However, certain statistical values, such as α ...
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Derived Units
Phil B. Fontanarosa and Stacy Christiansen
in AMA Manual of Style: A Guide for Authors and Editors (10th edition)
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 ...
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Drug Doses
Phil B. Fontanarosa and Stacy Christiansen
in AMA Manual of Style: A Guide for Authors and Editors (10th edition)
Drug doses are expressed in conventional metric mass units (eg, milligrams or milligrams per kilogram), rather than in molar SI units. Moreover, certain drugs (such as insulin or heparin) may be ...
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Energy
Phil B. Fontanarosa and Stacy Christiansen
in AMA Manual of Style: A Guide for Authors and Editors (10th edition)
The calorie is the unit of measure often used in chemistry and biochemistry for reporting heat energy. A value of 1 calorie is the amount of energy (heat) required to raise the temperature of 1 g of ...
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