Evidence map›Paper›PMID 33627619›Full record

SynthesisTranslational psychiatry2021

Meta-analysis of probability estimates of worldwide variation of CYP2D6 and CYP2C19.

Anne B Koopmans, Mario H Braakman, David J Vinkers, Hans W Hoek, Peter N van Harten

Abstract readMeta-AnalysisReview
In one paragraph

Synthesis in Translational psychiatry, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 70 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
70citing papers in PubMed, 3 pooled it
–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

70 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Frontiers in pharmacology · 2025
    Pooled it
  4. Article
  5. Article
  6. Article
  7. Review
  8. Review
  9. Article
  10. Influence ofPharmaceuticals (Basel, Switzerland) · 2026
    Article
  11. Observational
  12. Distribution ofFrontiers in genetics · 2026
    Article
  13. Article
  14. Review
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  16. Article
  17. Pharmacogenomics ofPharmaceutics · 2025
    Article
  18. Article
  19. Article
  20. Prevalence ofAnnals of neurosciences · 2025
    Article

10 more citing papers are in PubMed but not listed here.

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

5 authors.

Anne B KoopmansParnassia Academy, Parnassia Psychiatric Institute, The Hague, the Netherlands. koopmansanne@gmail.com.ORCID http://orcid.org/0000-0002-2113-3414
Mario H BraakmanDepartment of Psychiatric Residency Training, Pro Persona Mental Health, Wolfheze, the Netherlands.
David J VinkersSchool for Mental Health and Neuroscience, Maastricht University, Maastricht, the Netherlands.
Hans W HoekParnassia Academy, Parnassia Psychiatric Institute, The Hague, the Netherlands.ORCID http://orcid.org/0000-0001-6353-5465
Peter N van HartenSchool for Mental Health and Neuroscience, Maastricht University, Maastricht, the Netherlands.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Extensive migration has led to the necessity of knowledge regarding the treatment of migrants with different ethnical backgrounds. This is especially relevant for pharmacological treatment, because of the significant variation between migrant groups in their capacity to metabolize drugs. For psychiatric medications, CYP2D6 and CYP2C19 enzymes are clinically relevant. The aim of this meta-analysis was to analyze studies reporting clinically useful information regarding CYP2D6 and CYP2C19 genotype frequencies, across populations and ethnic groups worldwide. To that end, we conducted a comprehensive meta-analysis using Embase, PubMed, Web of Science, and PsycINFO (>336,000 subjects, 318 reports). A non-normal metabolizer (non-NM) probability estimate was introduced as the equivalent of the sum-prevalence of predicted poor, intermediate, and ultrarapid metabolizer CYP2D6 and CYP2C19 phenotypes. The probability of having a CYP2D6 non-NM predicted phenotype was highest in Algeria (61%) and lowest in Gambia (2.7%) while the probability for CYP2C19 was highest in India (80%) and lowest in countries in the Americas, particularly Mexico (32%). The mean total probability estimates of having a non-NM predicted phenotype worldwide were 36.4% and 61.9% for CYP2D6 and CYP2C19, respectively. We provide detailed tables and world maps summarizing clinically relevant data regarding the prevalence of CYP2D6 and CYP2C19 predicted phenotypes and demonstrating large inter-ethnic differences. Based on the documented probability estimates, pre-emptive pharmacogenetic testing is encouraged for every patient who will undergo therapy with a drug(s) that is metabolized by CYP2D6 and/or CYP2C19 pathways and should be considered in case of treatment resistance or serious side effects.

Indexed as

Cytochrome P-450 CYP2D6Cytochrome P-450 CYP2C19GenotypeHumansIndiaProbabilityCYP2C19 protein, humanCytochrome P-450 CYP2C19Cytochrome P-450 CYP2D6

Identifiers

PMID33627619
PMCPMC7904867

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Registered trials

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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.