Front page
Handbook information
Part 1: Cochrane reviews
Part 2: General methods for Cochrane reviews
5 Defining the review question and developing criteria for including studies
6 Searching for studies
7 Selecting studies and collecting data
8 Assessing risk of bias in included studies
9 Analysing data and undertaking metaanalyses
10 Addressing reporting biases
11 Presenting results and 'Summary of findings' tables
12 Interpreting results and drawing conclusions
12.1 Introduction
12.2 Assessing the quality of a body of evidence
12.3 Issues in applicability
12.4 Interpreting results of statistical analyses
12.5 Interpreting results from dichotomous outcomes (including numbers needed to treat)
12.5.1 Relative and absolute risk reductions
12.5.2 More about the number needed to treat (NNT)
12.5.3 Expressing absolute risk reductions
12.5.4 Computations
Introductory text
12.5.4.1 Computing NNT from a risk difference (RD)
12.5.4.2 Computing absolute risk reduction or NNT from a risk ratio (RR)
12.5.4.3 Computing absolute risk reduction or NNT from an odds ratio (OR)
12.5.4.4 Computing risk ratio from an odds ratio (OR)
12.5.4.5 Computing confidence limits
12.6 Interpreting results from continuous outcomes (including standardized mean differences)
12.7 Drawing conclusions
12.8 Chapter information
Box 12.8.a: The Cochrane Applicability and Recommendations Methods
12.9 References
Part 3: Special topics
Additional material
