Augmenting Clinical Workflow With a Structured Chatbot for Patient History Collection and Diagnostic Support (CHAT-HX)
Prospective Observational Evaluation of a Structured, Agentic AI Chatbot for Pre-Visit Patient History Collection and Diagnostic Support in Outpatient Clinical Workflows
Doctors spend much of each visit collecting the patient's medical history, and incomplete histories can delay diagnosis. This study tests an AI chatbot that interviews patients before their appointment and produces a structured summary of their history for the doctor. Adult patients at the first study site, a university gynecology outpatient clinic in Germany, answer the chatbot's questions on a tablet before the doctor visit. The doctor then takes the history and examines the patient as usual, without seeing the chatbot's output. Only after the doctor has finished planning care does the doctor review the chatbot's summary and rate its usefulness and accuracy. The chatbot does not change patient care. Patients also rate the ease of use and acceptability of the chatbot. The investigators will report how useful doctors find the summaries, how complete and correct the summaries are, and how patients experience the tool.
Panoramica dello studio
Stato
Intervento / Trattamento
Descrizione dettagliata
This is a prospective, observational study of an AI-based, structured history-taking tool used before a clinical visit. The tool uses large language models and follows a fixed interview plan with defined topic blocks, such as chief complaint, current history, past conditions, medications, allergies, specialty-specific history, and social and family history. It produces a structured history summary, a list of possible diagnoses, and suggested workup steps. In earlier benchmarking on more than 670 simulated and clinical cases, the system captured most clinically relevant history items and flagged clinically important warning signs.
The study is designed so that the tool does not influence care. Participants give written informed consent, then complete the AI interview on a study tablet using a pseudonymous study ID. Participants enter no name, birth date, or address. Participants then complete a short questionnaire on usability and acceptance. The treating physician takes a full history, examines the patient, and documents a plan without access to the AI output. Only afterward does the physician receive the AI output and complete a structured evaluation of its completeness, correctness, plausibility, and usefulness. No follow-up contact occurs after the visit.
The study is not randomized and has no control arm. The physician's independently obtained history serves as the reference standard. The first site is the Department of Gynecology at Leipzig University Hospital, with about 100 patients and 8 to 15 physicians. Analysis is descriptive, with subgroup comparisons by reason for visit. Additional sites may be added later. The study is a collaboration between Leipzig University Hospital and Massachusetts General Hospital and Harvard Medical School.
Tipo di studio
Iscrizione (Stimato)
Contatti e Sedi
Contatto studio
- Nome: Sonu Subudhi, MBBS, PhD
- Numero di telefono: 617-726-8051
- Email: ssubudhi@mgh.harvard.edu
Luoghi di studio
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Leipzig, Germania, 04103
- Universität Leipzig
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Contatto:
- Bahriye Aktas
- Numero di telefono: +49 341 97 23400
- Email: bahriye.aktas@medizin.uni-leipzig.de
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Metodo di campionamento
Popolazione di studio
Adult women presenting for the first time, or with a new complaint, to the general gynecology outpatient clinic, the gynecology emergency clinic, or as referrals to the gynecology outpatient clinic at the first study site (Leipzig University Hospital, Germany). Patients are recruited consecutively in the clinic waiting area by trained study staff. Additional sites may be added later.
Descrizione
Inclusion Criteria:
Women 18 years or older
First presentation or new complaint at the gynecology outpatient clinic (self-presentation, emergency, or referral)
Sufficient German language skills to complete a structured patient interview independently
Able to complete study participation without external support
Written informed consent
Exclusion Criteria:
Acute emergency requiring immediate treatment (for example, impaired consciousness, hemodynamic instability, or acute bleeding requiring immediate care)
Lack of legal or decisional capacity to consent
Insufficient language skills
Severe cognitive, visual, or motor impairment preventing tablet use
Previous participation in this study
Refusal or withdrawal of consent
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Modelli osservazionali: COHORT
- Prospettive temporali: PROSPECTIVE
Coorti e interventi
Gruppo / Coorte |
Intervento / Trattamento |
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Adult Clinic Patients
Adult patients with a first presentation or new complaint at the participating outpatient clinic who consent to complete the AI-based pre-visit history interview and questionnaire. Their physician completes routine care blinded to the AI output, then evaluates the AI-generated summary. |
A large language model-based agentic chatbot that conducts a structured, pre-visit history interview on a study tablet and generates a history summary, differential diagnosis list, and workup suggestions. The output is released to the treating physician only after the physician has completed an independent history, examination, and care plan, and does not influence patient care. |
Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
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Proportion of AI history summaries rated useful by the evaluating physician
Lasso di tempo: Same day as the enrollment visit, after routine care is complete (up to approximately 1 day)
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After completing routine care, the treating physician rates the usefulness of the AI-generated history summary on a 5-point Likert scale (1 = not useful at all, 5 = very useful). The outcome is the proportion of summaries rated 4 or higher, reported with a 95% Wilson confidence interval. |
Same day as the enrollment visit, after routine care is complete (up to approximately 1 day)
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Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Completeness of the AI-generated history
Lasso di tempo: Same day as the enrollment visit, after routine care is complete (up to approximately 1 day)
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Percentage of items from a standardized history grid that the AI captured correctly, reported overall and by history domain. |
Same day as the enrollment visit, after routine care is complete (up to approximately 1 day)
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Correctness of the AI-generated history
Lasso di tempo: Same day as the enrollment visit, after routine care is complete (up to approximately 1 day)
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Proportion of factually incorrect or missing clinically relevant items in the AI history, per physician review. |
Same day as the enrollment visit, after routine care is complete (up to approximately 1 day)
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Plausibility of AI differential diagnoses
Lasso di tempo: Same day as the enrollment visit, after routine care is complete (up to approximately 1 day)
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Physician rating of plausibility on a 1-5 Likert scale, and concordance of the AI differential with the physician's working diagnosis. |
Same day as the enrollment visit, after routine care is complete (up to approximately 1 day)
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Plausibility of AI workup recommendations
Lasso di tempo: Same day as the enrollment visit, after routine care is complete (up to approximately 1 day)
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Physician rating of the AI's suggested diagnostic workup on a 1-5 Likert scale. |
Same day as the enrollment visit, after routine care is complete (up to approximately 1 day)
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Identification of clinically relevant red flags
Lasso di tempo: Same day as the enrollment visit, after routine care is complete (up to approximately 1 day)
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Proportion of clinically relevant red flags correctly recognized by the AI versus not recognized, per physician review. |
Same day as the enrollment visit, after routine care is complete (up to approximately 1 day)
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Patient usability (System Usability Scale)
Lasso di tempo: Same day as the enrollment visit, immediately after the AI interview or after the physician consultation (up to approximately 1 day)
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Patient-completed System Usability Scale, score 0-100, higher scores indicating better usability. |
Same day as the enrollment visit, immediately after the AI interview or after the physician consultation (up to approximately 1 day)
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Patient acceptance and willingness to use the tool again
Lasso di tempo: Same day as the enrollment visit, immediately after the AI interview or after the physician consultation (up to approximately 1 day)
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Patient-reported acceptance, comprehensibility, empathy, comfort, trust, and willingness to use again, each on a 1-5 Likert scale. |
Same day as the enrollment visit, immediately after the AI interview or after the physician consultation (up to approximately 1 day)
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Duration of the AI interaction
Lasso di tempo: During the AI interview at the enrollment visit (approximately 15 minutes)
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Time in minutes for the patient to complete the AI interview, recorded automatically by the system. |
During the AI interview at the enrollment visit (approximately 15 minutes)
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Physician-estimated time savings
Lasso di tempo: Same day as the enrollment visit, after routine care is complete (up to approximately 1 day)
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Physician's estimate, in minutes, of the time the AI history would save in clinical workflow. |
Same day as the enrollment visit, after routine care is complete (up to approximately 1 day)
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Collaboratori e investigatori
Sponsor
Collaboratori
Pubblicazioni e link utili
Studiare le date dei record
Studia le date principali
Inizio studio (Stimato)
Completamento primario (Stimato)
Completamento dello studio (Stimato)
Date di iscrizione allo studio
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Effettivo)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Altri numeri di identificazione dello studio
- 2026P001764
- 201/26-ek (Altro identificatore: Ethics Committee, Medical Faculty, Leipzig University)
Piano per i dati dei singoli partecipanti (IPD)
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Descrizione del piano IPD
Individual participant data will not be shared with outside researchers. Participants consented under a German ethics-approved form that permits only fully anonymized, aggregated data to be shared with collaborating study partners for analysis and publication. Data are pseudonymized, are classified as health data under GDPR, and remain on servers of the clinical site. De-identified aggregate results will be reported in publications.
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