Step 3: Creating the analysis

Study-centric data is only available for the reviews that enter the pilot. If you are interested in learning more about the pilot and how to join, please contact revman@cochrane.org.

1. Add analysis group

Once you have set up the concepts (Step 1) and entered study results (Step 2), you are almost ready to see the result of your efforts, but first you need to create an analysis group where you can place the analysis (analysis groups were formerly known as comparisons). Click Analyses in the navigation panel, and on the Analyses page, click Add Analysis Group .

For the Name of the analysis group enter 'Antibiotic versus placebo', and then click the 'Back to Analyses' link to get back to the previous page.

2. Add analysis

Back on the Analyses page, expand the panel for the analysis group that you just created by clicking on its name. Then click Add Analysis. You are prompted whether you would like to create an analysis based on study data or custom input. Choose Study Data because you want to base the analysis on the data you just entered.

3. Set the synthesis PICO

On the Analysis page under Synthesis PICO, choose 'Persistent symptoms after 7 days' as the Outcome, 'Antibiotics' as the Experimental Intervention and 'Placebo' as the Control Intervention. Provide a Name for the analysis, which in this case is the same as the name of the outcome. Leave the Statistical Settings at the defaults for now.

Click the Graphs page and you will see a forest plot with the result of the analysis. Notice how the two antibiotics arms for the study 'Herne 1980' (as per data entered in Step 2), have been combined automatically. That would also happen for continuous outcomes. Change the labels under the graph to read 'Favours antibiotics' and 'Favours placebo'.