Data Analysis
Results from all studies were analysed concurrently, following the
convergent integrated approach in Hong’s typology 40.
We treated the data in the “qualitized” declarative statements as
qualitative data and used a staged constant comparative coding strategy
adapted from Grounded Theory 49, which we have
previously used in integrative qualitative meta-synthesis45, 50, 51. This is an inductive approach to analysis
which starts with initial rounds of coding to describe and condense the
findings of individual studies. The analysts then proceed to generate
categories from these descriptive codes and later move to a constant
comparative analysis. During comparative analysis we paid attention to
factors such as the legal status of cannabis, comparator substances,
funding source, time of publication, sampling strategy, discipline of
authors. Analysis was led by MV, JP, AP, ST. All analytic
interpretations were negotiated during regular meetings with the whole
research team.