Evaluation of a multi-component, non-pharmacological intervention to prevent and reduce sleep disturbances in people with dementia living in nursing homes (MoNoPol-sleep): study protocol for a cluster-randomized exploratory trial.

Background: Sleep problems are highly prevalent in people with dementia. Nevertheless, there is no "gold standard" intervention to prevent or reduce sleep problems in people with dementia. Existing interventions are characterized by a pronounced heterogeneity as well as insufficient knowledge about the possibilities and challenges of implementation.

An observational study found large methodological heterogeneity in systematic reviews addressing prevalence and cumulative incidence.

Objectives: The objective of this study was to assess reporting and methodological aspects of systematic reviews (SRs) on prevalence and cumulative incidence data.

Study Design And Setting: We searched PubMed up to 18 April, 2018, and drew a random sample of eligible SRs.

Results: The included 215 SRs were reported in 187 different journals.