BACKGROUND Previous work highlighted a number of methodological constraints when reporting health-related quality of life (HRQOL) outcomes from randomized controlled trials (RCTs). Given this, the objective of this study was to investigate whether the quality of such HRQOL reports has improved over time. MATERIALS AND METHODS On the basis of a predefined set of criteria, 159 RCTs with a HRQOL...

This paper covers the topic of randomized controlled trials in social, educational, criminological, health, and other human service sectors. It is studded with illustrations from developed and developing countries. We address the basic ideas that underlie trials in different ways, and cover contemporary definitions and vernacular, some history, and idea of cumulating evidence from such trials i...

Conventional treatment for primary dysmenorrhoea has a failure rate of 20% to 25% and may be contraindicated or not tolerated by some women. Herbal medicine may be a suitable alternative. The objective of the manuscript, is determine the efficacy and safety of some Iranian herbal medicine for primary dysmenorrhea when compared with placebo, no treatment, and other treatment. For this target ele...

BACKGROUND In randomized controlled trials (RCTs), the intention-to-treat (ITT) principle, which involves maintaining study participants in the treatment groups to which they were randomized regardless of postrandomization withdrawal, is the recommended analytic approach for preserving the integrity of randomization, yet little is known about the use of ITT in nursing RCTs. OBJECTIVES The pur...

Cluster randomized controlled trial (RCT), in which groups or clusters of individuals rather than individuals themselves are randomized, are increasingly common. Indeed, for the evaluation of certain types of intervention (such as those used in health promotion and educational interventions) a cluster randomized trial is virtually the only valid approach. However, cluster trials are generally m...