Scott A. Baldwin|Zac E. Imel|Scott R. Braithwaite|David C. Atkins
Analyzing multiple outcomes in clinical research using multivariate multilevel models.
Brigham Young University|University of Utah|Brigham Young University|University of Washington
multilevel models become standard data analysis approach intervention research although vast majority intervention studies involve multiple outcome measures studies use multivariate analysis methods authors discuss multivariate extensions multilevel model used psychotherapy researchersusing simulated longitudinal treatment data authors show multivariate models extend common univariate growth models multivariate model used examine multivariate hypotheses involving fixed effects eg size treatment effect differ across outcomes random effects eg change one outcome related change online supplemental appendix provides annotated computer code simulated example data implementing multivariate modelmultivariate multilevel models flexible powerful models enhance clinical research