Evidence map›Paper›PMID 42245438›Full record

Trial reportInternational journal of public health2026

Optimizing colorectal cancer screening through quality circles of primary care physicians: a cluster randomized controlled trial.

Tamara Scharf, Marc-Andrea Janggen, Yonas Martin, Julian Jakob, Kali Tal, Nikola Biller-Andorno, Jean-Luc Bulliard, Kevin Selby, Reto Auer, Adrian Rohrbasser

Registry-linked trialAbstract readRandomized Controlled TrialPragmatic Clinical Trial
PubMed Full text at PMC Publisher
In one paragraph

Trial report in International journal of public health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03510858 (Colorectal Cancer Testing in Swiss Primary Care), which is not on this map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing 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.

NCT03510858 nacompletednot on this map

Colorectal Cancer Testing in Swiss Primary Care: A Pilot Pragmatic Cluster Randomized Controlled Trial in Quality Circles of Physicians

TypeinterventionalSponsorUniversity of BernRan2018 to 2021Enrolled44ConditionsColorectal CancerArmsMultilevel training intervention (intervention group), Multilevel training intervention (control group with crossover)
3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Trial
  2. 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

10 authors.

Tamara ScharfInstitute of Primary Healthcare (BIHAM), University of Bern, Bern, Switzerland.
Marc-Andrea JanggenInstitute of Primary Healthcare (BIHAM), University of Bern, Bern, Switzerland.
Yonas MartinInstitute of Primary Healthcare (BIHAM), University of Bern, Bern, Switzerland.
Julian JakobInstitute of Primary Healthcare (BIHAM), University of Bern, Bern, Switzerland.
Kali TalInstitute of Primary Healthcare (BIHAM), University of Bern, Bern, Switzerland.
Nikola Biller-AndornoInstitute for Biomedical Ethics and History of Medicine (IBME), UZH, Zürich, Switzerland.
Jean-Luc BulliardCenter for Primary Care and Public Health (Unisanté), Lausanne, Switzerland.
Kevin SelbyCenter for Primary Care and Public Health (Unisanté), Lausanne, Switzerland.
Reto AuerInstitute of Primary Healthcare (BIHAM), University of Bern, Bern, Switzerland.
Adrian RohrbasserInstitute of Primary Healthcare (BIHAM), University of Bern, Bern, Switzerland.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Objectives: Colorectal cancer (CRC) screening rates are low in Switzerland. This study tested whether a PCP intervention-training sessions and performance feedback within quality circles (QC) increased CRC screening rates. Methods: A pragmatic randomized controlled trial was conducted in Switzerland (2018-2021) with PCP in QC. The intervention included three training sessions, shared decision-making materials, and performance feedback based on 40 consecutive patients per PCP. The primary outcome was the difference in CRC screening rates between the intervention and control group after 12 months. Results: Of 120 invited QC, nine participated (5 intervention, 4 control). A total of 63 PCPs (32 intervention, 31 control) collected data on 2,112 patients (1,130 intervention, 982 control; mean age 61.5, 53% women). Analysis clustered by PCP and QC showed screening rate was 58% in the intervention group vs. 42% in controls (OR1.98; 95% CI:1.14-3.42). Screening rates in the intervention group increased from 55% to 57.9% (absolute increase: 2.9%; 95% CI:1.1%-6.9%; OR1.29; 95% CI:1.08-1.55, p < 0.01). Conclusion: Training sessions and performance feedback in QC increased screening rates, but few QCs chose to participate. Clinical Trial Registration: ClinicalTrials.gov, identifier NCT03510858.

Indexed as

Colorectal NeoplasmsEarly Detection of CancerPhysicians, Primary CareAgedFemaleHumansMaleMiddle AgedSwitzerlandcolonoscopycolorectal cancerfecal occult blood testingpragmatic trialprimary care

Identifiers

PMID42245438
PMCPMC13229839

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Registered trials

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.