We are conducting IPD meta-analyses to examine psychosocial treatments for children and adolescents with ADHD. Psychosocial interventions are defined as all interventions with a psychosocial (psychological or social) aim. More specifically, we  included studies investigating behavioral interventions.

What is an Individual Participant Data Meta-analysis?

An IPD meta-analysis is a specific type of systematic review. In an IPD meta-analysis, individual participant data is collected in a systematic manner. IPD are the data collected for each participant in each study. The IPD meta-analysis has also been described as the golden standard of systematic reviews.

Why perform an  Individual Participant Data Meta-analysis

An IPD meta-analysis differs from aggregated data meta-analysis in that aggregated data meta-analysis uses results described in research articles, while IPD meta-analysis uses the original participant data. With this method it is possible to look whether a treatment in effective. However, there are several advantages with using IPD meta-analysis, like using the same method across all studies for handling missing data, and which participants to include. Furthermore, the same analysis, with the same variables and covariates can be used across studies, specific subgroup analysis can be performed, and moderator and predictor analysis with great statistical power can be performed. Importantly, using individual participant data meta-analysis (IPD meta-analysis), can cause a great advance in the matter of personalized medicine with regard to psychosocial treatments for ADHD.