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This document provides guidance to study authors about how to describe group design studies and report their findings in a way that is clear, complete, and transparent. The first two sections detail the descriptive information, and the third section describes the data that WWC reviewers use to assess studies.

This document does not include information about how studies are judged against WWC design standards. For information about the WWC review process and design standards, please refer to the WWC Procedures and Standards Handbooks.


Table of Contents

  • I. Study Characteristics and Context
  • II. Study Design and Analysis
  • III. Study Data
  • Table 1. Information to include for each outcome measure, time point, and comparison
  • Table 2. Additional data to include for RCTs that assigned individuals to the intervention and comparison groups
  • Table 3. Additional sample sizes to include for all studies that assigned clusters to the intervention and comparison groups
  • Table 4. Additional sample sizes to include for RCTs that assigned clusters to the intervention and comparison groups
  • Table 5. Data to include for each pre-intervention measure for which any observations are missing or imputed in the analytic sample and each outcome measure for which any observations are imputed

Document Details

  • Version: 2.0
  • Released: February 2018

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