The EAL is seeking RDNs and NDTRs who work with patients, clients, or the public to treat children and adolescents living with type 1 diabetes, for participation in a usability test and focus group. Interested participants should email a professional resume to by July 15, 2024.

Classification of Studies

Hierarchy and Classification of Research Studies

Primary ReportsSecondary Reports


 Randomized Controlled Trial
 Cluster Randomized Trial
 Randomized Crossover Trial



 Meta-analysis or Systematic review
 Decision analysis
 Cost-benefit analysis
 Cost-effectiveness study
B Prospective Cohort Study
 Retrospective Cohort Study
C Non-Randomized Controlled        Trial
 Non-Randomized Crossover        Trial
 Case-Control Study
 Time Series Study
 Diagnostic, Validity or  Reliability  Study
R Narrative review (Review article)
 Consensus statement
 Consensus report
D Non-Controlled Trial
 Case Study or Case Series
 Other Descriptive Study
 Cross-Sectional Study
 Trend Study
 Before-After Study
X Medical opinion