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Table 5 Weighted ranking of participant responses to the “top-five” priorities question order by the most highly ranked item in survey 2

From: An international, Delphi consensus study to identify priorities for methodological research in behavioral trials in health research

Item nameWeighted ranking score
Survey 1
Overall rank
Survey 1
Weighted ranking score Survey 2Overall rank
Survey 2
Tailoring interventions to specific populations and contexts9411091
Methods for ensuring that behavioral interventions are implementable into practice and policy725972
Specifying intervention components802753
Use of systematic approaches to move from evidence to intervention components725734
Development of novel research designs to test behavioral interventions as alternatives to, or to complement, standard randomized controlled trials (RCTs)744675
How to disseminate behavioral trial research findings to increase implementation753636
Using theory in behavioral intervention development706577
Measurement of process(es) of change or mechanisms of action within interventions597577
Determining clinically significant changes in outcomes within trials489438
Selection of suitable comparison group(s) within trials498339
Reporting intervention and comparison group(s) intervention content37132510
Selecting appropriate behavioral outcomes for trials44122011
Standardizing methods for reporting behavioral trials11231812
Methods to assess intervention fidelity32141713
Strategies to maximize trial participant recruitment and retention47101614
Strategies to optimize intervention fidelity (including adherence)22181315
Engaging stakeholders in the selection of outcomes (New item in survey 2)N/An/a1315
Relationship between behavioral outcomes and clinical/other outcomes32141216
Standardized methods for reporting and registering behavioral trials’ protocols29151017
Novel approaches and designs for piloting behavioral interventions4511918
Establishing criteria for progressing from trial piloting phases to full RCT2716819
Incorporating stakeholder input in intervention development and delivery824720
How to optimize stakeholder engagement in behavioral trials’ research1222421
Impact on intervention delivery of characteristics (such as qualifications and training) of those delivering interventions2019421
Methods for cost-effectiveness analyses for behavioral trials1820322
Strategies for handling missing data within behavioral trials327223
Sample-size calculations for pilot725024
Developing novel statistical techniques to enhance behavioral trials327024
Determining ideal timing of outcome measurement within trials824024
Testing the impact of stakeholder engagement in behavioral trial research626024
Trials’ research to test and develop behavioral theories1421024
Investigating the impact of intervention intensity on outcomes (New item in survey 2)N/An/a024
Exploring impact of mode of intervention delivery2317024
Contamination between study arms (intervention and comparison) within trials1421024
Blinding of researchers and participants to study-arm allocation028024
  1. NB. Weights were calculated as follows: first priority = 5; second priority = 4; third priority = 3; fourth priority = 2; fifth priority = 1