Abstract
Individual participant data (IPD) meta-analysis is a meta-analysis in which the individual-level data for each study are obtained and used for synthesis. A common challenge in IPD meta-analysis is when variables of interest are measured differently in different studies. The term harmonization has been coined to describe the procedure of placing variables on the same scale in order to permit pooling of data from a large number of studies. Using data from an IPD meta-analysis of 19 adolescent depression trials, we describe a multiple imputation approach for harmonizing 10 depression measures across the 19 trials by treating those depression measures that were not used in a study as missing data. We then apply diagnostics to address the fit of our imputation model. Even after reducing the scale of our application, we were still unable to produce accurate imputations of the missing values. We describe those features of the data that made it difficult to harmonize the depression measures and provide some guidelines for using multiple imputation for harmonization in IPD meta-analysis.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 95-108 |
| Number of pages | 14 |
| Journal | Prevention Science |
| Volume | 19 |
| DOIs | |
| State | Published - Feb 1 2018 |
Funding
We gratefully acknowledge the National Institute of Mental Health Collaborative Synthesis for Adolescent Depression Trials Study Team, comprised of our many colleagues who generously provided their data to be used in this study, obtained access to key datasets, reviewed coding decisions, or provided substantive or methodologic recommendations. We also thank NIH for their support through Grant Number R01MH040859 (Collaborative Synthesis for Adolescent Depression Trials, Brown PI), and the following grants: Siddique-NCI CA154862-01, Garber, Brent, Beardslee, Clarke et al. NIMH MH64735, MH6454, MH64717, Gillham et al.– NIMH MH52270, Garber et al.– William T. Grant Foundation 961730, Dishion et al.– NIDA DA07031 and DA13773, Gillham et al.– NIMH MH52270, Szapocznik et al.– NIMH MH61143, Pantin et al.– NIDA DA017462, Prado et al.– NIDA DA025894, Prado et al.– CDC U01PS000671, Stormshak et al.– NIDA DA018374, Sandler et al.– NIMH MH49155, Wolchik et al.– NIMH MH068685, Young et al.– NARSAD, Spoth et al. – NIDA DA 007029, Clarke et al.– NIMH MH 48118, Young et al.– NIMH MH071320, Beardslee et al.– NIMH MH48696, VanVoorhees et al.– NIMH MH072918, and Gonzales et al. NIMH MH64707. The content of this paper is solely the responsibility of the authors and does not necessarily represent the official views of the funding agencies nor that of our collaborators who provided access to their data. Acknowledgments We gratefully acknowledge the National Institute of Mental Health Collaborative Synthesis for Adolescent Depression Trials Study Team, comprised of our many colleagues who generously provided their data to be used in this study, obtained access to key datasets, reviewed coding decisions, or provided substantive or methodologic recommendations. We also thank NIH for their support through Grant Number R01MH040859 (Collaborative Synthesis for Adolescent Depression Trials, Brown PI), and the following grants: Siddique-NCI CA154862-01, Garber, Brent, Beardslee, Clarke et al. NIMH MH64735, MH6454, MH64717, Gillham et al.– NIMH MH52270, Garber et al.– William T. Grant Foundation 961730, Dishion et al.– NIDA DA07031 and DA13773, Gillham et al.– NIMH MH52270, Szapocznik et al.– NIMH MH61143, Pantin et al.– NIDA DA017462, Prado et al.– NIDA DA025894, Prado et al.– CDC U01PS000671, Stormshak et al.– NIDA DA018374, Sandler et al.– NIMH MH49155, Wolchik et al.– NIMH MH068685, Young et al.– NARSAD, Spoth et al. – NIDA DA 007029, Clarke et al.– NIMH MH 48118, Young et al.– NIMH MH071320, Beardslee et al.– NIMH MH48696, VanVoorhees et al.– NIMH MH072918, and Gonzales et al. NIMH MH64707. The content of this paper is solely the responsibility of the authors and does not necessarily represent the official views of the funding agencies nor that of our collaborators who provided access to their data.
Keywords
- Data synthesis
- Individual participant data meta-analysis
- Multiple imputation
- Posterior predictive checking
ASJC Scopus subject areas
- Public Health, Environmental and Occupational Health