A single study rarely suffices to underpin treatment or policy decisions. This creates a strong
imperative for systematic reviews. Authors of reviews need a method to synthesize the …

Work environment factors are highly correlated with employees' health and well-being. Our
aim was to sum up current evidence of health promotion interventions in the workplace …

Background Classification of study design can help provide a common language for
researchers. Within a systematic review, definition of specific study designs can help guide …

Literature reviews are conducted for a range of purposes, from providing an overview or
primer of a novel topic, to providing a comprehensive, precise, and accurate estimate of an …

Systematic reviews are powerful tools for drawing causal inference for evidence-based
decision-making. Published systematic reviews and meta-analyses of environmental and …

Background Systematic review is a powerful research tool which aims to identify and
synthesize all evidence relevant to a research question. The approach taken is much like …

OBJECTIVES: To develop and test a study design classification tool. STUDY DESIGN: We
contacted relevant organizations and individuals to identify tools used to classify study …

Psychology researchers and practitioners are besieged by information. To take just one
health behaviour as an example, up to 1,000 articles on smoking are added every year to …

Systematic review is a scientific process for systematically assessing the available evidence
from scientific studies, for example, about the prevalence of a condition or the comparative …

Background Confounding caused by selection bias is often a key difference between non‐
randomized studies (NRS) and randomized controlled trials (RCTs) of interventions. Key …