Evidence map›Paper›PMID 34163144›Full record

ArticlePatient preference and adherence2021

Enhancing Specific Health Literacy with a Digital Evidence-Based Patient Decision Aid for Hypertension: A Randomized Controlled Trial.

Kai Wehkamp, Felicia Beatrice Kiefer, Friedemann Geiger, Fueloep Scheibler, Jens Ulrich Rueffer, Norbert Donner-Banzhoff, Cornelia Betsch

Abstract read
In one paragraph

Article in Patient preference and adherence, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing 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

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

  1. Pooled it
  2. A systematic review of patient decision aids for hypertension.BMC medical informatics and decision making · 2026
    Pooled it
  3. Decision aids for people facing health treatment or screening decisions.The Cochrane database of systematic reviews · 2024
    Pooled it
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  7. Observational
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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

7 authors.

Kai Wehkamp *Department of Pediatrics/Project SHARE TO CARE, University Hospital Schleswig-Holstein, Kiel, Schleswig-Holstein, Germany.ORCID 0000-0003-3536-4958
Felicia Beatrice Kiefer *Center for Empirical Research in Economics and Behavioral Sciences, University of Erfurt, Erfurt, Thüringen, Germany.
Friedemann GeigerDepartment of Pediatrics/Project SHARE TO CARE, University Hospital Schleswig-Holstein, Kiel, Schleswig-Holstein, Germany.
Fueloep ScheiblerDepartment of Pediatrics/Project SHARE TO CARE, University Hospital Schleswig-Holstein, Kiel, Schleswig-Holstein, Germany.ORCID 0000-0002-4983-7253
Jens Ulrich RuefferTake Part Media & Science GmbH, Cologne, Nordrhein-Westfalen, Germany.
Norbert Donner-BanzhoffDepartment of General Practice/Family Medicine, University of Marburg, Marburg, Hessen, Germany.
Cornelia BetschCenter for Empirical Research in Economics and Behavioral Sciences, University of Erfurt, Erfurt, Thüringen, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionHealth literacy is an important competency to make informed, shared decisions in line with patient's preferences. On the other hand, lower health literacy is associated with poorer health outcomes. Evidence-based patient decision aids (EbPDA) are validated instruments to support informed medical decisions and empower patients for relevant involvement in their care. This study aimed to investigate the effect of a digital EbPDA for hypertension on health literacy.

methodsIn a randomized controlled trial, 124 participants were presented with a web-based scenario related to a newly diagnosed condition of arterial hypertension. The intervention group was provided with an online decision aid, while the control group was prompted to search for related information without support. Specific health literacy for hypertension was operationalized based on the European survey for health literacy (HLS-EU-Q47).

resultsThe intervention group showed a statistically significant increase in subjectively perceived overall specific health literacy regarding hypertension (p=0.02, Cohen's d=0.44). The effect was also statistically significant for the subcategories understanding, appraising, and applying health-related information (all p<0.05). At least equal results could be shown for participants with a lower level of education compared to participants with a high level.

conclusionThe findings suggest that digital EbPDAs can be an effective and easily scalable instrument to improve populations' specific health literacy. A possible advantage of the measure could be that patients are addressed concerning important and pressing personal decisions, fostering awareness of the individual's need for health literacy to reflect one's options and preferences. EbPDAs may also be a promising approach to target vulnerable populations, as the investigated EbPDA seems to perform equally in less versus more educated individuals. For future research, it may be interesting to investigate whether EbPDAs have effects on general health literacy that go beyond the disease specifically addressed.

Indexed as

decision aidsequityhealth literacypreferencesshared decision-making

Identifiers

PMID34163144
PMCPMC8214525

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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.