Cited by 274Lipoproteins and Cardiovascular HealthStatistical Methods in Clinical TrialsPharmacovigilance and Adverse Drug Reactions

N-of-1 Trial of a Statin, Placebo, or No Treatment to Assess Side Effects

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Wood, Frances A., Howard, James P., Finegold, Judith A., Nowbar, Alexandra N., Thompson, David M., Arnold, Ahran D., Rajkumar, Christopher A., Connolly, Susan +7 more·2020·New England Journal of Medicine

Abstract

N-of-1 Trial of a Statin, Placebo, or No Treatment to Assess Side EffectsTo the Editor: Statins are often discontinued because of side effects, 1,2 even though some blinded trials have not shown an excess of symptoms with statins as compared with placebo.3,4 Patients who had previously discontinued statins because of side effects that occurred within 2 weeks after the initiation of treatment were enrolled in a double-blind, three-group, n-of-1 trial to test whether symptoms would be induced by a statin or placebo.Details of the trial methods are provided in Section S2 in the Supplementary Appendix (available with the full text of this letter at NEJM.org); the trial protocol and statistical analysis plan are also available at NEJM.org.The patients received four bottles containing atorvastatin at a dose of 20 mg, four bottles containing placebo, and four empty bottles; each bottle was to be used for a 1-month period according to a random sequence.The patients used a smartphone application to report symptom intensity daily.Symptom scores ranged from 0 (no symptoms) to 100 (worst imaginable symptoms).If the patients determined that their symptoms were unacceptably severe, they could discontinue the tablets for that month.The primary end point was symptom intensity as assessed with the use of the nocebo ratio (i.e., the ratio of symptom intensity induced by taking placebo to the symptom intensity induced by taking a statin).This ratio was calculated as the symptom intensity with placebo minus the symptom intensity with neither statin nor placebo, divided by the symptom intensity with a statin minus the symptom intensity with neither statin nor placebo.From June 2016 through March 2019, a total of 60 patients underwent randomization.The screening data, the baseline characteristics of the

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Authors
Wood, F. A., Howard, J. P., Finegold, J. A., Nowbar, A. N., Thompson, D. M., Arnold, A. D., Rajkumar, C. A., Connolly, S., Cegla, J., Stride, C., Sever, P., Norton, C., Thom, S. A. M., Shun-Shin, M. J., & Francis, D. P.
Affiliations
  • Imperial College London (GB)
  • Imperial College Healthcare NHS Trust (GB)
  • University of Sheffield (GB)
  • King's College London (GB)
  • Imperial College London, London, United Kingdom
Venue
New England Journal of Medicine
Published
2020-11-26
Volume
383
Issue
22
Pages
2182-2184
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W3104495732
Cited by
274
References
4
Citations by year
2026: 29 · 2025: 25 · 2024: 29 · 2023: 37 · 2022: 59 · 2021: 92 · 2020: 3
FWCI
43.61
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • White Rose Research Online (University of Leeds, The University of Sheffield, University of York) (acceptedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • Spiral (Imperial College London) (submittedVersion)
Funders
British Heart Foundation (PG/15/7/31235)
Topics
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
  • Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods in Clinical Trials
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Pharmacovigilance and Adverse Drug Reactions
Keywords
statins, atorvastatin, adverse drug reactions, nocebo effect, placebo response, symptom intensity, N-of-1 trials, statin discontinuation
MeSH terms
Atorvastatin, Adult, Double-Blind Method, Humans, Placebos, Confidence Intervals, Hydroxymethylglutaryl-CoA Reductase Inhibitors

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