Hiroko Okada
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View article: Redefining health communication through narrative intersection: opening closed narratives and co-creating meaning
Redefining health communication through narrative intersection: opening closed narratives and co-creating meaning Open
We aimed to propose a new conceptualization of health communication that mitigates the limitations of traditional one-way models by introducing a relational, narrative-based approach that emphasizes mutual understanding. This paper critiqu…
View article: Changes in maternal coping strategies from pregnancy to postpartum among Japanese women: A prospective longitudinal study
Changes in maternal coping strategies from pregnancy to postpartum among Japanese women: A prospective longitudinal study Open
Background: Coping strategies like self-distraction and self-blame predict later maternal mental health problems; however, little is known about changes in coping strategies that occur within pregnant individuals. Objectives: This study an…
View article: Factors Predicting Information Overload During the COVID-19 Pandemic in the Digital Age: Longitudinal Study
Factors Predicting Information Overload During the COVID-19 Pandemic in the Digital Age: Longitudinal Study Open
Background The human capacity to process information is limited. During the COVID-19 pandemic, people were exposed to a large amount of uncertain and complex health information. This situation made some people experience perceived informat…
View article: Evaluating the Reliability and Accuracy of an AI-Powered Search Engine in Providing Responses on Dietary Supplements: Quantitative and Qualitative Evaluation
Evaluating the Reliability and Accuracy of an AI-Powered Search Engine in Providing Responses on Dietary Supplements: Quantitative and Qualitative Evaluation Open
Background The widespread adoption of artificial intelligence (AI)–powered search engines has transformed how people access health information. Microsoft Copilot, formerly Bing Chat, offers real-time web-sourced responses to user queries, …
View article: Listening to the silence of pain narratives: A qualitative study of epistemic injustice in patient–clinician communication on medically unexplained chronic pain in Japan
Listening to the silence of pain narratives: A qualitative study of epistemic injustice in patient–clinician communication on medically unexplained chronic pain in Japan Open
Clinicians should cultivate epistemic humility and validate patient narratives, regardless of diagnostic certainty. Establishing institutional and cultural conditions that protect narrative spaces is both an ethical and practical imperativ…
View article: Associations between lifestyle habits and family members’ health literacy in middle-aged adults with metabolic syndrome: a cross-sectional study in Japan
Associations between lifestyle habits and family members’ health literacy in middle-aged adults with metabolic syndrome: a cross-sectional study in Japan Open
Background Health literacy has gained importance as a factor related to health behaviors and the risk of developing metabolic syndrome (MetS). Although the health literacy of family members may affect lifestyle habits among individuals wit…
View article: Comparison of Japanese Mpox (Monkeypox) Health Education Materials and Texts Created by Artificial Intelligence: Cross-Sectional Quantitative Content Analysis Study
Comparison of Japanese Mpox (Monkeypox) Health Education Materials and Texts Created by Artificial Intelligence: Cross-Sectional Quantitative Content Analysis Study Open
Background Mpox (monkeypox) outbreaks since 2022 have emphasized the importance of accessible health education materials. However, many Japanese online resources on mpox are difficult to understand, creating barriers for public health comm…
View article: Effectiveness and Related Factors of Narrative Messages in Correcting Health-Related Misinformation: Protocol for a Systematic Review
Effectiveness and Related Factors of Narrative Messages in Correcting Health-Related Misinformation: Protocol for a Systematic Review Open
Background The internet and social media have become essential sources of health information for patients and citizens; however, they often disseminate misinformation that lacks scientific evidence. Health-related misinformation can underm…
View article: Textbook-Level Medical Knowledge in Large Language Models: A Comparative Evaluation Using the Japanese National Medical Examination
Textbook-Level Medical Knowledge in Large Language Models: A Comparative Evaluation Using the Japanese National Medical Examination Open
Study aims and objectives This study aimed to evaluate the performance of four reasoning-enhanced large language models (LLMs)—GPT-5, Grok-4, Claude Opus 4.1, and Gemini 2.5 Pro—on the Japanese National Medical Examination (JNME). Methods …
View article: Responsiveness of the Japanese version of the Pregnancy‐Related Anxiety Questionnaire‐Revised 2 and its predictive validity for postnatal maternal mental health: A longitudinal study in Japan
Responsiveness of the Japanese version of the Pregnancy‐Related Anxiety Questionnaire‐Revised 2 and its predictive validity for postnatal maternal mental health: A longitudinal study in Japan Open
Aim The extent to which pregnancy‐related anxiety predicts postnatal maternal mental health remains unclear. This study aimed to evaluate the responsiveness and predictive validity of the Japanese version of the Pregnancy‐Related Anxiety Q…
View article: Hidden misinformation in YouTube short videos on syphilis: A mixed-methods study
Hidden misinformation in YouTube short videos on syphilis: A mixed-methods study Open
This study is among the first to analyze YouTube short videos about STIs, combining qualitative and quantitative methods to assess misinformation.
View article: Pro- and anti-fluoride use messages on YouTube in Japan: A content analysis (Preprint)
Pro- and anti-fluoride use messages on YouTube in Japan: A content analysis (Preprint) Open
BACKGROUND Dental caries is one of the most prevalent chronic conditions worldwide, affecting approximately 44% of the global population. In Japan, fluoride application—mainly via toothpaste, mouth rinses, and professional treatments—is a…
View article: Effectiveness and determinants of narrative-based corrections for health misinformation: A systematic review
Effectiveness and determinants of narrative-based corrections for health misinformation: A systematic review Open
The effectiveness of narrative-based corrections on health misinformation depends on thoughtful design grounded in theoretical principles such as transportation, identification, and exemplification. Health communicators should consider nar…
View article: Reliability of AI-generated responses on frequently-posed questions by patients with chronic kidney disease
Reliability of AI-generated responses on frequently-posed questions by patients with chronic kidney disease Open
Background AI tools are becoming primary information sources for patients with chronic kidney disease (CKD). However, as AI sometimes generates factual or inaccurate information, the reliability of information must be assessed. Methods Thi…
View article: Development and psychometric evaluation of the Infertility Public Stigma Scale for Japanese women: protocol for an exploratory sequential mixed method study of the Japanese population
Development and psychometric evaluation of the Infertility Public Stigma Scale for Japanese women: protocol for an exploratory sequential mixed method study of the Japanese population Open
Introduction Women undergoing infertility treatment are often tagged with negative labels, subjected to negative reactions and behaviors by laypeople (public stigma), and they internalize these negative values (self-stigma). As self-stigma…
View article: Leveraging artificial intelligence chatbots for anemia prevention: A comparative study of ChatGPT-3.5, copilot, and Gemini outputs against Google Search results
Leveraging artificial intelligence chatbots for anemia prevention: A comparative study of ChatGPT-3.5, copilot, and Gemini outputs against Google Search results Open
AI-generated texts on anemia were found to be more readable and easier to understand than traditional web-based texts, with Gemini demonstrating the highest level of understandability. Moving forward, improvements in prompts will be necess…
View article: Experiences of Public Health Professionals Regarding Crisis Communication During the COVID-19 Pandemic: Systematic Review of Qualitative Studies
Experiences of Public Health Professionals Regarding Crisis Communication During the COVID-19 Pandemic: Systematic Review of Qualitative Studies Open
Background The COVID-19 pandemic emerged in the digital age and has been called the first “data-driven pandemic” in human history. The global response demonstrated that many countries had failed to effectively prepare for such an event. Le…
View article: Evaluating the understandability and actionability of Japanese human papillomavirus vaccination educational materials on cervical cancer
Evaluating the understandability and actionability of Japanese human papillomavirus vaccination educational materials on cervical cancer Open
Educational materials about human papillomavirus (HPV) vaccination must be easy to understand and must support recommended behaviors regardless of readers’ health literacy levels. The purpose of this study was to evaluate the understandabi…
View article: Readability of written information for patients across 30 years: A systematic review of systematic reviews
Readability of written information for patients across 30 years: A systematic review of systematic reviews Open
Health professionals should use available guidelines to make existing patient information easy to read and to write easy-to-read patient information, thereby improving readability. Such efforts are needed regardless of the organizations th…
View article: Evaluating Online and Offline Health Information With the Patient Education Materials Assessment Tool: Protocol for a Systematic Review
Evaluating Online and Offline Health Information With the Patient Education Materials Assessment Tool: Protocol for a Systematic Review Open
Background The Patient Education Materials Assessment Tool (PEMAT) is a reliable and validated instrument for assessing the understandability and actionability of patient education materials. It has been applied across diverse cultural and…
View article: Family‐Centered Care in asthma treatment for patients under 5 years of age
Family‐Centered Care in asthma treatment for patients under 5 years of age Open
Background Family‐Centered Care (FCC) is important for self‐management education and partnership building in childhood asthma treatment. This study aimed to gather suggestions for promoting FCC in the asthma treatment of patients aged <5 y…
View article: Analysis of the growth trajectories of junior residents in Japan: a longitudinal cohort study using data from a nationwide e-portfolio system (EPOC2)
Analysis of the growth trajectories of junior residents in Japan: a longitudinal cohort study using data from a nationwide e-portfolio system (EPOC2) Open
Objectives As more emphasis is placed on the acquisition of competencies in medical education, portfolios are increasingly being used for evaluation. EPOC2 (E-POrtfolio of Clinical training) is an e-portfolio system developed in Japan and …
View article: Quality Assessment of Medical Institutions’ Websites Regarding Prescription Drug Misuse of Glucagon-Like Peptide-1 Receptor Agonists by Off-Label Use for Weight Loss: Website Evaluation Study
Quality Assessment of Medical Institutions’ Websites Regarding Prescription Drug Misuse of Glucagon-Like Peptide-1 Receptor Agonists by Off-Label Use for Weight Loss: Website Evaluation Study Open
Background Misuse of glucagon-like peptide-1 receptor agonists (GLP-1RAs) has emerged globally as individuals increasingly use these drugs for weight loss because of unrealistic and attractive body images advertised and shared on the inter…
View article: Readability of online and offline written health information: a protocol of a systematic review of systematic reviews
Readability of online and offline written health information: a protocol of a systematic review of systematic reviews Open
Introduction Healthcare organisations should create and disseminate readable information to citizens and patients to reduce the level of health literacy required for individuals. Several systematic reviews have reported overviews of the re…
View article: Producing nuclear disaster prevention materials with artificial intelligence chatbots: comparison of ChatGPT-3.5, Copilot, and Gemini output with google search results
Producing nuclear disaster prevention materials with artificial intelligence chatbots: comparison of ChatGPT-3.5, Copilot, and Gemini output with google search results Open
Objective : To compare the understandability, actionability, and readability of AI chatbot-generated text and webpage text about nuclear disasters. Methods : In this cross-sectional study, we compared the understandability, actionability, …
View article: Quality Assessment of Medical Institutions’ Websites Regarding Prescription Drug Misuse of Glucagon-Like Peptide-1 Receptor Agonists by Off-Label Use for Weight Loss: Website Evaluation Study (Preprint)
Quality Assessment of Medical Institutions’ Websites Regarding Prescription Drug Misuse of Glucagon-Like Peptide-1 Receptor Agonists by Off-Label Use for Weight Loss: Website Evaluation Study (Preprint) Open
BACKGROUND Misuse of glucagon-like peptide-1 receptor agonists (GLP-1RAs) has emerged globally as individuals increasingly use these drugs for weight loss because of unrealistic and attractive body images advertised and shared on the inte…
View article: Large Language Models in Dental Licensing Examinations: Systematic Review and Meta-Analysis
Large Language Models in Dental Licensing Examinations: Systematic Review and Meta-Analysis Open
LLMs, particularly GPT-4, show potential in dental education and diagnostics, yet their accuracy remains below the threshold required for clinical application. The lack of sufficient training data in dentistry has affected LLMs' accuracy. …
View article: Evaluating the Effectiveness of advanced large language models in medical Knowledge: A Comparative study using Japanese national medical examination
Evaluating the Effectiveness of advanced large language models in medical Knowledge: A Comparative study using Japanese national medical examination Open
GPT-4o achieved an overall accuracy rate close to 90%, with 95.0% on easy questions, significantly outperforming the other LLMs. This indicates GPT-4o's potential as a knowledge source for easy questions. Image-based questions and question…
View article: Performance of ChatGPT in medical licensing examinations in countries worldwide: A systematic review and meta-analysis protocol
Performance of ChatGPT in medical licensing examinations in countries worldwide: A systematic review and meta-analysis protocol Open
Introduction In November 2022, the online artificial intelligence (AI) chatbot ChatGPT was released to the public, and swiftly garnered global attention because of its ability to provide detailed answers to complex queries. In medical fiel…