Online-Offline Integrated Multimodal Teaching Combining PBL, CBL, and CTTM to Enhance Clinical Self-Efficacy in Endocrine and Metabolic Critical Illness Among Internal Medicine Residents: A Convergent Parallel Mixed- Methods Randomized Controlled Trial
This convergent parallel mixed-methods randomized controlled trial demonstrates that an online-offline integrated teaching model combining PBL, CBL, and CTTM significantly enhances internal medicine residents' theoretical knowledge, clinical skills, and self-efficacy in managing endocrine and metabolic critical illnesses compared to traditional lecture-based or single-method approaches.
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In the high-stakes world of hospital medicine, the difference between a calm, effective response to a medical emergency and a paralyzing hesitation often comes down to a doctor's internal confidence. This confidence, known in psychology as self-efficacy, is the belief that one possesses the skills to handle a specific situation. For young doctors training in internal medicine, this belief is frequently shaken when they face sudden, life-threatening metabolic crises, such as severe blood sugar imbalances or thyroid storms. These conditions are complex and abstract; the chemical processes happening inside a patient's body are invisible, making it difficult for a trainee to visualize what is wrong or how to fix it. Traditional medical education often relies on lectures where information flows one way from teacher to student, leaving the trainee to imagine the application of that knowledge alone. When a young doctor feels unprepared to touch a patient or adjust a critical medication, they may hesitate, and that hesitation can delay life-saving treatment.
A team of researchers at the Fourth Affiliated Hospital of Anhui Medical University set out to solve this problem by redesigning how these trainees learn. They wanted to know if combining three distinct teaching methods into a single, seamless system could transform a student's fear into competence. They tested a new approach that blended online preparation, real-world patient interaction, and advanced visual tools. The goal was not just to see if the students learned more facts, but to see if they felt more capable of acting when a patient's life was on the line.
The study involved ninety internal medicine residents who were rotating through the endocrinology department for the first time. The researchers divided them into three equal groups to compare different learning styles. The first group received the standard approach: a series of traditional lectures where they listened to instructors and reviewed materials on their own. The second group added a layer of problem-based learning, where they discussed complex medical cases online before class, forcing them to research and think critically before hearing the lecture. The third group received the full, integrated treatment. They did the online problem-solving, attended the lectures, and then moved into the hospital wards for supervised, hands-on training with real patients. Crucially, this third group also used a three-dimensional teaching method, which utilized computer-generated animations and 3D reconstructions to visualize the invisible metabolic pathways inside the body, followed by a structured cycle of feedback and review.
After a twelve-hour curriculum focused on endocrine and metabolic critical illnesses, the results were striking. The students in the fully integrated group significantly outperformed the others in every category. They scored higher on written tests, but more importantly, they demonstrated far superior skills in analyzing critical cases and managing patient care. Nearly all of them, ninety-seven percent, reported that their ability to manage these high-risk situations had improved. In contrast, the students who only listened to lectures or those who only discussed cases online without the hands-on and visual components remained less confident and less skilled. The data showed that the combination of seeing the invisible processes, practicing on real patients under supervision, and receiving continuous feedback created a complete learning loop that the other methods could not match.
The researchers also looked deeper into the psychology of the students to understand why this method worked so well. They found that the integrated approach successfully addressed the four main sources of confidence identified by psychological theory. First, the students gained mastery experience by actually performing tasks under supervision, which is the strongest way to build confidence. Second, they learned through observation by watching senior doctors handle complex cases, providing a clear model to follow. Third, they received consistent verbal encouragement and correction from multiple sources, from online discussions to bedside guidance. Finally, the use of visual simulations and gradual practice helped lower their anxiety, allowing them to approach emergencies with a calm mind rather than fear. While the other groups struggled with specific gaps—such as lacking a chance to touch a patient or having no way to visualize the disease—the integrated group filled every gap, resulting in a unified sense of readiness.
This study suggests that the way medical residents are trained for critical care can be fundamentally improved by closing the gap between theory and practice. The researchers found that a system which combines online preparation, visual aids to make the abstract concrete, and supervised hands-on training creates a powerful learning environment. This approach does not require expensive, high-tech equipment to be effective; the core elements can be adapted for hospitals with fewer resources. By ensuring that trainees not only know the facts but also feel capable of acting on them, this method offers a path to safer patient care and a more confident next generation of doctors. The findings indicate that when education mirrors the complexity of real life, the fear of the unknown is replaced by the assurance of preparation.
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