title: Missing outcome data in meta-analysis.
abstract: Missing outcome data is a common problem in mental health trials compromising the validity of results and leading to the loss of precision. The problem is accumulated in a meta-analysis of clinical trials with missing outcome data.
authors.affiliation: Department of Hygiene and Epidemiology, University of Ioannina School of Medicine, Ioannina, Greece.|Department of Primary Education, University of Ioannina, Ioannina, Greece.
authors.forename: Dimitris
authors.initials: D
authors.lastname: Mavridis
authors.affiliation: Department of Hygiene and Epidemiology, University of Ioannina School of Medicine, Ioannina, Greece.
authors.forename: Anna
authors.initials: A
authors.lastname: Chaimani
authors.affiliation: Department of Hygiene and Epidemiology, University of Ioannina School of Medicine, Ioannina, Greece.
authors.forename: Orestis
authors.initials: O
authors.lastname: Efthimiou
authors.affiliation: Department of Hygiene and Epidemiology, University of Ioannina School of Medicine, Ioannina, Greece.
authors.forename: Georgia
authors.initials: G
authors.lastname: Salanti
mesh_terms: D003627:Data Interpretation, Statistical; D006801:Humans; D015201:Meta-Analysis as Topic; D015233:Models, Statistical; D017063:Outcome Assessment, Health Care