Doing a Systematic Review: A Student's Guide
Second Edition
Chapter 6. Data Extraction: Where Do I Begin?
Here are some other helpful materials for you to read through.
Link to the Cochrane Handbook (see Part 7 of ‘Chapter 11: Information about how to present results in the text’)
http://handbook.cochrane.org/chapter_11/11_7_presenting_results_in_the_text.htm
Link to the Centre for Reviews and Dissemination Handbook (section 1.3.5 contains useful information about presenting results)
www.york.ac.uk/crd/SysRev/!SSL!/WebHelp/1_3_UNDERTAKING_THE_REVIEW.htm
Link to the Cochrane Handbook (see ‘Chapter 7: Information on selecting studies and collecting data’)