Evidence map›Paper›PMID 34389867›Full record

ArticleJournal of the American Medical Informatics Association : JAMIA2021

From clinical trials to clinical practice: How long are drugs tested and then used by patients?

Chi Yuan, Patrick B Ryan, Casey N Ta, Jae Hyun Kim, Ziran Li, Chunhua Weng

Abstract read
In one paragraph

Article in Journal of the American Medical Informatics Association : JAMIA, 2021. 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. Trial
  2. Long-term real-world effectiveness and safety of fremanezumab in 1140 patients with migraine and at least 6 months of treatment: third interim analysis of the pan-European PEARL study.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025
    Trial
  3. Review
  4. Review
  5. Article
  6. Review
  7. 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

6 authors.

Chi YuanDepartment of Biomedical Informatics, Columbia University, New York, New York, USA.
Patrick B RyanDepartment of Biomedical Informatics, Columbia University, New York, New York, USA.
Casey N TaDepartment of Biomedical Informatics, Columbia University, New York, New York, USA.
Jae Hyun KimDepartment of Biomedical Informatics, Columbia University, New York, New York, USA.
Ziran LiDepartment of Biomedical Informatics, Columbia University, New York, New York, USA.
Chunhua WengDepartment of Biomedical Informatics, Columbia University, New York, New York, USA.ORCID 0000-0002-9624-0214

Funding

Clinical and Translational Science AwardUL1TR001873 · NCATS · COLUMBIA UNIVERSITY HEALTH SCIENCES · PI REILLY, MUREDACH P · 2016 to 2025
$99.0M
Bridging the Semantic Gap Between Research Eligibility Criteria and Clinical DataR01LM009886 · NLM · COLUMBIA UNIVERSITY HEALTH SCIENCES · PI WENG, CHUNHUA · 2009 to 2020
$5.3M
NCATS NIH HHS grant UL1TR001873NCATS NIH HHS UL1 TR001873NLM NIH HHS 5R01LM009886-11
6 · The paper itself

Abstract

objectiveEvidence is scarce regarding the safety of long-term drug use, especially for drugs treating chronic diseases. To bridge this knowledge gap, this research investigated the differences in drug exposure between clinical trials and clinical practice. MATERIALS AND

methodsWe extracted drug follow-up times from clinical trials in ClinicalTrials.gov and compared the difference between clinical trials and real-world usage data for 914 drugs taken by 96 645 927 patients.

resultsA total of 17.5% of drugs had longer median exposure in practice than in trials, 6% of patients had extended exposure to at least 1 drug, and drugs treating nervous system disorders and cardiovascular diseases were the most common among drugs with high rates of extended exposure.

conclusionsFor most of patients, the drug use length is shorter than the tested length in clinical trials. Still, a remarkable number of patients experienced extended drug exposure, particularly for drugs treating nervous system disorders or cardiovascular disorders.

Indexed as

Pharmaceutical PreparationsHumansPharmaceutical Preparationsevidence-based medicinefollow-up studiesprescription drug overuserandomized controlled trialsvalidation study

Identifiers

PMID34389867
PMCPMC8510283

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.