Tools for Those Who Summarize the Evidence Base
Hello, I'm compiling data for a meta-analysis regarding enzyme concentrations in a patient group compared to a control group that are quantified in papers using different units of measurement, for example μmol/l, nmol/ml, pg/ml, ng/ml etc. My question seems rather elementary, but I can't find sufficient evidence elsewhere to back up my thinking. My inclination is to forego converting the values to a standard unit, but rather to use the standardized mean difference as essentially a 'neutral' unit of measurement. Is this correct? Thanks so much!