Cited by 285Statistical Methods in Clinical TrialsAdvanced Causal Inference TechniquesMeta-analysis and systematic reviews

Intention to treat and per protocol analysis in clinical trials

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Tripepi, Giovanni, Chesnaye, Nicholas C., Dekker, Friedo W., Zoccali, Carmine, Jager, Kitty J.·2020·Nephrology

Abstract

In clinical epidemiology, experimental studies usually take the form of randomized controlled clinical trials (RCTs). The data analysis of an RCT can be performed by using two complementary strategies, that is according to the intention to treat (ITT) principle and the per protocol (PP) analysis. By using the ITT approach, investigators aim to assess the effect of assigning a drug whereas by adopting the PP analysis, researchers investigate the effect of receiving the assigned treatment, as specified in the protocol. Both ITT and PP analyses are essentially valid but they have different scopes and interpretations dependent on the context.

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Authors
Tripepi, G., Chesnaye, N. C., Dekker, F. W., Zoccali, C., & Jager, K. J.
Affiliations
  • CNR‐IFC Clinical Epidemiology and Pathophysiology of Renal Diseases and Hypertension Reggio Calabria Italy
  • Amsterdam UMC Location University of Amsterdam (NL)
  • Leiden University Medical Center (NL)
Corresponding author
Tripepi, Giovanni
Venue
Nephrology
Publisher
Wiley
Published
2020-03-15
Volume
25
Issue
7
Pages
513-517
ISSN
  • 1320-5358 (ISSN-L)
  • 1440-1797
OpenAlex
W3010995490
Cited by
284
References
10
Citations by year
2026: 47 · 2025: 69 · 2024: 66 · 2023: 53 · 2022: 30 · 2021: 18 · 2020: 1
FWCI
17.98
Type
journal article
Language
en
Open access
Locations
  • Nephrology (publishedVersion)
  • PubMed (publishedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
  • Pure Amsterdam UMC (submittedVersion, other-oa)
Topics
  • Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods in Clinical Trials
  • Physical Sciences › Mathematics › Statistics and Probability › Advanced Causal Inference Techniques
  • Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Meta-analysis and systematic reviews
Keywords
intention-to-treat analysis, per-protocol analysis, randomized controlled trials, treatment effect estimation, protocol adherence, clinical trial data analysis
MeSH terms
Clinical Protocols, Humans, Reproducibility of Results, Randomized Controlled Trials as Topic, Intention to Treat Analysis

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