Evidence map›Paper›PMID 18504330›Full record

ArticleArchives of internal medicine2008

N-of-1 trials of expensive biological therapies: a third way?

Richard L Kravitz, Naihua Duan, Richard H White

Abstract read
In one paragraph

Article in Archives of internal medicine, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

8 citing papers in PubMed.

  1. The N-of-1 Trials and where to use them in Rheumatology.Mediterranean journal of rheumatology · 2025
    Review
  2. Review
  3. Article
  4. Article
  5. Review
  6. Article
  7. Acrylamine-induced autoimmune phenomena.Clinical rheumatology · 2010
    Article
  8. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Richard L KravitzDivision of General Medicine and Center for Healthcare Policy and Research, University of California, Davis, School of Medicine, Sacramento, CA 95817, USA. rlkravitz@ucdavis.edu
Naihua Duan
Richard H White

Funding

Improving Care for Comorbid Physical and Mental IllnessK24MH072756 · NIMH · UNIVERSITY OF CALIFORNIA DAVIS · PI KRAVITZ, RICHARD L · 2005 to 2009
$643k
NIMH NIH HHS K24 MH072756NIMH NIH HHS K24 MH72756
6 · The paper itself

Abstract

In developing policies for use of expensive agents, such as those used for the treatment of rheumatoid arthritis, managed care organizations have invoked "stepped care," in which physicians and patients must first try more established and less costly agents. N-of-1 clinical trials are multiple crossover trials in a single patient. In this cost-minimization analysis, we show that offering patients with rheumatoid arthritis the opportunity to participate in an n-of-1 trial comparing methotrexate with etanercept could save costs relative to open access while preserving clinical freedom relative to mandatory stepped care. In the primary model, the n-of-1 trial option was 15% more expensive than stepped care but 47% cheaper than open access to etanercept. More research is needed on the acceptability, safety, and generalizability of this promising approach.

Indexed as

Antirheumatic AgentsArthritis, RheumatoidCost-Benefit AnalysisDecision TreesDrug Therapy, CombinationEtanerceptHumansImmunoglobulin GMethotrexateReceptors, Tumor Necrosis FactorTreatment OutcomeAntirheumatic AgentsEtanerceptImmunoglobulin GMethotrexateReceptors, Tumor Necrosis Factor

Identifiers

PMID18504330
PMCPMC2715700

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.