The next step of the SR process is to read the full text of each included study and extract the pertinent data using a standardized data extraction/coding form. You should undergo this step whether you plan to perform a meta-analysis or not. According to MECIR Box 5.4.a , data collection for systematic reviews should be performed using structured data collection forms.
What items to collect in data collection or data extraction?
The Cochrane Handbook for Systematic Reviews of Interventions outlines the types of data to consider for extraction/collection from included studies. Refer to Table 5.3.a Checklist of items to consider in data collection for more information.