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Abbreviations.  

Lauren Fischer and Paul Frank

in AMA Manual of Style: A Guide for Authors and Editors (11th edn)

Print Publication Year: 
Feb 2020
Published Online: 
Feb 2020
DOI: 
10.1093/jama/9780190246556.003.0017.022.0013
Item type: 
section
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. Thereafter, the abbreviated form should be used in text (see 14.12, Units of Measure)....

Base Units.  

Lauren Fischer and Paul Frank

in AMA Manual of Style: A Guide for Authors and Editors (11th edn)

Print Publication Year: 
Feb 2020
Published Online: 
Feb 2020
DOI: 
10.1093/jama/9780190246556.003.0017.022.0002
Item type: 
section
The SI is based on 7 fundamental units (base units) that refer to 7 basic quantities of measurement (Table 17.1-1). These units form the structure from which other measurement quantities are composed. Although not included among the 7 base units, the liter is widely used in the SI as a fundamental measure of capacity or volume. The liter is the recommended unit for measurement of volume for liquids and gases, whereas the cubic meter is the SI unit of volume for solids. Although the kelvin is the SI unit for thermodynamic temperature, Celsius is used with the SI for temperature measurement in biomedical settings....

Capitalization.  

Lauren Fischer and Paul Frank

in AMA Manual of Style: A Guide for Authors and Editors (11th edn)

Print Publication Year: 
Feb 2020
Published Online: 
Feb 2020
DOI: 
10.1093/jama/9780190246556.003.0017.022.0006
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, with the following exceptions: ■ Abbreviations derived from a proper name should be capitalized (eg, N for newton, K for kelvin, A for ampere), although nonabbreviated SI unit names derived from a proper name are not capitalized (eg, newtons, amperes)....

Conventional Units and SI Units in JAMA Network Journals.  

Lauren Fischer and Paul Frank

in AMA Manual of Style: A Guide for Authors and Editors (11th edn)

Print Publication Year: 
Feb 2020
Published Online: 
Feb 2020
DOI: 
10.1093/jama/9780190246556.003.0017.021.0006
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 report many laboratory values by means of conventional units. To serve these readers, but also to serve the needs of readers more familiar with JAMA Network journals have adopted an approach for reporting units of measure that includes a combination of SI units and conventional units....

Currency.  

Lauren Fischer and Paul Frank

in AMA Manual of Style: A Guide for Authors and Editors (11th edn)

Print Publication Year: 
Feb 2020
Published Online: 
Feb 2020
DOI: 
10.1093/jama/9780190246556.003.0017.022.0034
Item type: 
section
Amounts of money are expressed as a decimal number or whole number preceded by the symbol for the unit of measure for the currency. The cost-effectiveness analysis suggested a $7000 difference between the 2 treatment strategies. Table 17.5-5 lists some international currencies and their symbols. Online currency converter programs are also available....

Decimal Format.  

Lauren Fischer and Paul Frank

in AMA Manual of Style: A Guide for Authors and Editors (11th edn)

Print Publication Year: 
Feb 2020
Published Online: 
Feb 2020
DOI: 
10.1093/jama/9780190246556.003.0017.022.0018
Item type: 
section
The decimal format is recommended for numbers used with units of measure. Fractions should not be used with SI units. Mixed fractions occasionally are used in text to indicate less precise measurements and most commonly involve units of measure that represent time. After more than 7½ years of investigation, the effort to develop a new vaccine was abandoned....

Derived Units.  

Lauren Fischer and Paul Frank

in AMA Manual of Style: A Guide for Authors and Editors (11th edn)

Print Publication Year: 
Feb 2020
Published Online: 
Feb 2020
DOI: 
10.1093/jama/9780190246556.003.0017.022.0003
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 in algebraic relationships to express other derived units (Table ...

Drug Doses.  

Lauren Fischer and Paul Frank

in AMA Manual of Style: A Guide for Authors and Editors (11th edn)

Print Publication Year: 
Feb 2020
Published Online: 
Feb 2020
DOI: 
10.1093/jama/9780190246556.003.0017.022.0031
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section
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 prepared as mixtures and have no specific molecular weight, thereby precluding their expression in mass units. Although other drug dose units, such as drops (for ophthalmologic preparations), grains (for aspirin), and various apothecary system measurements (eg, teaspoonfuls, ounces, and drams), may be encountered clinically, these units generally are not used....

Energy.  

Lauren Fischer and Paul Frank

in AMA Manual of Style: A Guide for Authors and Editors (11th edn)

Print Publication Year: 
Feb 2020
Published Online: 
Feb 2020
DOI: 
10.1093/jama/9780190246556.003.0017.022.0030
Item type: 
section
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 pure water by 1 °C. The joule is the preferred SI unit for energy, and calories and kilocalories may be converted to joules (J) and kilojoules (kJ) by using the following formulas:...

Exponents.  

Lauren Fischer and Paul Frank

in AMA Manual of Style: A Guide for Authors and Editors (11th edn)

Print Publication Year: 
Feb 2020
Published Online: 
Feb 2020
DOI: 
10.1093/jama/9780190246556.003.0017.022.0009
Item type: 
section
The SI reporting style uses exponents rather than certain abbreviations, such as cu and sq. Previous | Next The same symbol is used for single and multiple quantities. Unit symbols are not expressed in the plural form....

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