Effectiveness of Using Interactive Consulting System to Enhance Informed Choice

Study Overview
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Brief Summary
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To compare the performance of an interactive chatbot versus senior ophthalmologists for enhancing informed decisions made by cataract patients. The chatbot was built based on large language models, and could generate medical expert-level responses.

Detailed Description
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Cataract surgery is the only way to treat age-related cataract. For patients at early or moderate stages, cataract surgery is an elective surgery without objective indications. Therefore the patients are uaually not aware whether they should receive the surgery. The number of trained and qualified ophthalmologists are limited in China and lots of patients cannot have detailed consultation with ophthalmologists. As a result, many patients still have doubts about whether they should receive cataract surgery or not. In this study, we aim to assess the effectiveness of an interactive chatbot based on large language models versus senior ophthalmologists to enhance informed decisions made by cataract patients.

Official Title
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Effectiveness of Using Interactive Consulting System Based on Large Language Model to Enhance Informed Choice of Cataract Patients: a Non-inferiority Randomized Controlled Trial

Conditions
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Age-related Cataract

Intervention / Treatment
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* Other: An interactive chatbot for patient decision aid
* Other: Senior ophthalmologists


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Individuals aged 45-80 years who have been resident in the selected study district for more than six months; A definite diagnosis of age-related cataract; Having not received cataract surgery; Willing to participate the study and provide informed consent. Exclusion Criteria: Bilateral blindness (presenting distance visual acuity worse than 3/60); Having ocular, hearing or mental disorders precluding reading or telephone interview; Ocular disorders other than cataract leading to permanent vision loss that could not be corrected through cataract surgery; Having cataract surgery contraindication.

Ages Eligible for Study
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Minimum Age: 45 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Health Services Research
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Interactive chatbot<br>A chatbot embedded into a mobile application which is able to bidirectionally interact with patients and provide standard general information, quantitative risk information on the possible outcomes of cataract surgery. | Other: An interactive chatbot for patient decision aid<br>* A chatbot embedded into a mobile application which is able to bidirectionally interact with patients and provide standard general information, quantitative risk information on the possible outcomes of cataract surgery.<br>|
| Active Comparator: Senior ophthalmologists<br>Senior ophthalmologists would communicate with patients and provide standard general information, quantitative risk information on the possible outcomes of cataract surgery. | Other: Senior ophthalmologists<br>* Senior ophthalmologists would communicate with patients and provide standard general information, quantitative risk information on the possible outcomes of cataract surgery.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Informed choice about cataract surgery (the proportion of participants who make an informed choice，which is defined as a good knowledge score and an intention that is consistent with their attitude score) | Informed choice is an aggregated measure of multiple measurements, including knowledge (a 12-item questionnaire that assesses conceptual (items 1-10) and numerical (items 11-12) knowledge), attitudes (6 items, with 5 responses for each), and intentions (single item with 5 responses) | 2 weeks post intervention |