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Meta-analysis

Margaret A. Winker and Stephen J. Lurie

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

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.021.280
Item type: 
section
Meta-analysis is a systematic pooling of the results of 2 or more studies to address a question of interest or hypothesis. According to Moher and Olkin, [Meta-analyses] provide a systematic and explicit ... More
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Methods

Margaret A. Winker and Stephen J. Lurie

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

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.022.595
Item type: 
section
UPDATE: We will discontinue using quotation marks to identify parts of an article, but retain the capitalization; eg, This is discussed in the Methods section (not the “Methods” section). This change ... More

Observational Studies

Margaret A. Winker and Stephen J. Lurie

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

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.021.279
Item type: 
section
In an observational study, the researcher identifies a condition or outcome of interest and then measures factors that may be related to that outcome. Although observational studies cannot lead to strong ... More

Parallel-Design Double-blind Trials

AMA Manual of Style Committee

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

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.022.599
Item type: 
section
In this study design, participants are assigned to only 1 treatment group of the study. These trials are generally designed to assess whether 1 or more treatments are superior to the others. Participants ... More

Randomized Controlled Trials

Margaret A. Winker and Stephen J. Lurie

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

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.021.278
Item type: 
section
The randomized controlled trial (RCT) generally leads to the strongest inferences about the effect of medical treatments. Randomized controlled trials assess efficacy of the treatment intervention in ... More
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Results

Margaret A. Winker and Stephen J. Lurie

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

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.022.596
Item type: 
section
UPDATE: We will discontinue using quotation marks to identify parts of an article, but retain the capitalization; eg, This is discussed in the Methods section (not the “Methods” section). This change ... More
This content has an associated quiz

Rounding

Margaret A. Winker and Stephen J. Lurie

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

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.022.608
Item type: 
section
The digits to the right of the last significant digit are rounded up or down. If the digit to the right of the last significant digit is less than 5, the last significant digit is not changed. If the ... More

Significant Digits

Margaret A. Winker and Stephen J. Lurie

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

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.022.607
Item type: 
section
The use of a numeral in a numbers column (eg, the ones column) implies that the method of measurement is accurate to that level of precision. For example, when a reporter attempts to estimate the size ... More

Significant Digits and Rounding Numbers

Margaret A. Winker and Stephen J. Lurie

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

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.021.284
Item type: 
section
When numbers are expressed in scientific and biomedical articles, they should reflect the degree of accuracy of the original measurement. Numbers obtained from mathematical calculations should be rounded ... More

Statistical Symbols and Abbreviations

Margaret A. Winker and Stephen J. Lurie

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

Print Publication Year: 
2007
Published Online: 
2009
DOI: 
10.1093/jama/9780195176339.021.286
Item type: 
section
The following may be used without expansion except where noted by an asterisk. For a term expanded at first mention, the abbreviation may be placed in parentheses after the expanded term and the abbreviation ... More

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