Clinical Reasoning: A 55-Year-Old Woman With Painless Hand Weakness and Atrophy.

Hand weakness is a frequent chief concern in neurology practice. We report a case of a 55-year-old woman presenting with a chronic, gradually worsening right hand weakness and atrophy, selectively affecting the thenar muscles, without any sensory symptoms. She had a history of carpal tunnel syndrome and previously underwent surgical carpal tunnel release. This case delves into the differential diagnosis of hand weakness and atrophy, emphasizing the significance of myotomal innervation in intrinsic hand muscles. Furthermore, it outlines a systematic approach to diagnosing an uncommon cause for a common clinical presentation, offering a comprehensive differential diagnosis, and exploring various possible causes.

Test for clinical reasoning evaluation in Speech-Language Pathology: content validity. / Teste para avaliação do raciocínio clínico em Fonoaudiologia: validade de conteúdo.

PURPOSE: To validate the content of the Speech-Language Pathology Concordance Test called FonoTCS. METHODS: This is a content validation study of the instrument. Five speech-language pathologists, all with doctoral degrees and teaching experience, averaging 24.8 years of professional practice, participated in the development of FonoTCS and reached a consensus during the process. Thirty questions and 120 items were created, covering seven areas of speech-language pathology expertise across three domains. For content validation, FonoTCS was electronically sent to 15 evaluators to respond to a questionnaire with five questions, rated on a five-point scale, regarding the criteria of clarity, ethics, and relevance of the questions. The Corrected Content Validity Coefficient was calculated for all statements to analyze the responses. Questions with agreement percentages equal to or less than 80% were revised. RESULTS: Thirteen evaluators, all female, with an average age of 39.07 years, including eight with master's degrees and five with doctoral degrees, and an average clinical practice experience of 15.38 years, participated in the analysis. The average Corrected Content Validity Coefficient values for the clarity criterion were 0.93 and 0.95, for the relevance criterion 0.98 and 0.92, and for the ethics criterion 0.99. Two questions received scores of 0.78 and 0.80, both related to the audiology area in the assessment/diagnosis domain, specifically question 2 regarding the relevance criterion. These questions were reviewed and restructured by the judges. CONCLUSION: FonoTCS is a valid instrument from a content perspective.

OBJETIVO: validar o conteúdo do Teste de Concordância de Scripts em Fonoaudiologia, denominado FonoTCS. MÉTODO: Trata-se de estudo de validação de conteúdo de instrumento. Participaram da construção do FonoTCS cinco fonoaudiólogas, doutoras e docentes, com média de 24,8 anos de atuação profissional, que chegaram a um consenso durante o processo de construção do teste. Elaborou-se 30 questões e 120 itens contemplando as áreas de atuação fonoaudiológica. Em seguida, 15 fonoaudiólogas com titulação mínima de mestre, e com, no mínimo, 10 anos de atuação clínica generalista receberam eletronicamente o FonoTCS para validação de conteúdo por meio de questionário sobre critérios de clareza, ética e pertinência do conteúdo das questões. Para a análise das respostas calculou-se o Coeficiente de Validade de Conteúdo Corrigido de todas as afirmativas. Foram revisadas as questões com porcentagem de concordância igual ou inferior a 80%. RESULTADOS: 13 avaliadores responderam a análise, todos do sexo feminino, com média de idade de 39,07 anos, sendo oito mestres e cinco doutoras, com atuação clínica generalista média de 15,38 anos. Os valores médios do Coeficiente de Validade de Conteúdo Corrigido foram 0,93 e 0,95 para o critério de clareza; 0,98 e 0,92 para o critério de pertinência; e 0,99 para o critério de ética. Duas questões apresentaram notas de 0,78 e 0,80, sendo ambas da área de audiologia no domínio de avaliação/diagnóstico, para a questão relacionada ao critério de pertinência, sendo revisadas e reestruturadas pelos juízes. CONCLUSÃO: O FonoTCS é um instrumento válido do ponto de vista do conteúdo.

Teaching clinical reasoning: principles from the literature to help improve instruction from the classroom to the bedside.

Clinical reasoning has been characterized as being an essential aspect of being a physician. Despite this, clinical reasoning has a variety of definitions and medical error, which is often attributed to clinical reasoning, has been reported to be a leading cause of death in the United States and abroad. Further, instructors struggle with teaching this essential ability which often does not play a significant role in the curriculum. In this article, we begin with defining clinical reasoning and then discuss four principles from the literature as well as a variety of techniques for teaching these principles to help ground an instructors' understanding in clinical reasoning. We also tackle contemporary challenges in teaching clinical reasoning such as the integration of artificial intelligence and strategies to help with transitions in instruction (e.g., from the classroom to the clinic or from medical school to residency/registrar training) and suggest next steps for research and innovation in clinical reasoning.

Exploring the responses of preclinical medical students and professors to flipped learning for the development of clinical reasoning.

PURPOSE: This study developed and implemented case-based flipped learning using illness script worksheets and investigated the responses of preclinical students and professors to the intervention in terms of its effectiveness, design, and implementation. METHODS: The study was conducted at a medical school in Korea, where the "clinical reasoning method" course, originally a lecture-oriented course, was redesigned into a flipped learning. In total, 42 second-year medical students and 15 professors participated in this course. After the class, online surveys were conducted, and a focus group interview was held with seven students to explore the students' experiences in more detail. RESULTS: In total, 37 students and seven professors participated in the survey. The mean score for all items is 3.12/4 for the student survey and 3.43/4 for the professor survey. The focus group interview results were categorized as the beneficial aspects and challenges for the development of clinical reasoning. CONCLUSION: The findings indicated that their responses to the intervention were generally positive, and it is thought to be an effective instructional method for fostering clinical reasoning skills in preclinical medical students.

Current status and ongoing needs for the teaching and assessment of clinical reasoning - an international mixed-methods study from the students` and teachers` perspective.

BACKGROUND: Clinical reasoning (CR) is a crucial ability that can prevent errors in patient care. Despite its important role, CR is often not taught explicitly and, even when it is taught, typically not all aspects of this ability are addressed in health professions education. Recent research has shown the need for explicit teaching of CR for both students and teachers. To further develop the teaching and learning of CR we need to improve the understanding of students' and teachers' needs regarding content as well as teaching and assessment methods for a student and trainer CR curriculum. METHODS: Parallel mixed-methods design that used web-surveys and semi-structured interviews to gather data from both students (nsurvey = 100; ninterviews = 13) and teachers (nsurvey = 112; ninterviews = 28). The interviews and surveys contained similar questions to allow for triangulation of the results. This study was conducted as part of the EU-funded project DID-ACT ( https://did-act.eu ). RESULTS: Both the surveys and interview data emphasized the need for content in a clinical reasoning (CR) curriculum such as "gathering, interpreting and synthesizing patient information", "generating differential diagnoses", "developing a diagnostic and a treatment plan" and "collaborative and interprofessional aspects of CR". There was high agreement that case-based learning and simulations are most useful for teaching CR. Clinical and oral examinations were favored for the assessment of CR. The preferred format for a train-the-trainer (TTT)-course was blended learning. There was also some agreement between the survey and interview participants regarding contents of a TTT-course (e.g. teaching and assessment methods for CR). The interviewees placed special importance on interprofessional aspects also for the TTT-course. CONCLUSIONS: We found some consensus on needed content, teaching and assessment methods for a student and TTT-course in CR. Future research could investigate the effects of CR curricula on desired outcomes, such as patient care.

[Taking origins into account in medical reasoning in infectious and tropical diseases? A critical look]. / Tenir compte des origines dans le raisonnement médical en maladies infectieuses et tropicales ? Un regard critique.

Healthcare discriminations based on one's ethnic background is increasingly being studied in medicine. The scale of the Covid-19 pandemic has played an important role in bringing them to light. Data, although scarce, exist in France. These discriminations have an impact on the care pathway and contribute to the renunciation of care by the most affected populations. The issue of discrimination is particularly relevant in infectious diseases. Although the epidemiology of infectious diseases is unevenly distributed worldwide, erroneous social representations are prevalent and expose to a harmful prejudice against migrants with regard to infectious diseases. The transmissible nature of some infectious diseases reinforces their stigmatizing potential. In this context, it seems important to discuss the dimension to be given to social determinants, geographical origin, phenotype, and ethnicity in teaching and medical reasoning. The English-speaking world uses the concept of "race" in a structural way, whereas this "international standard" has not been applied in France until now. To improve the care of people from minority groups, it seems important to better document and teach a more nuanced clinical reasoning based on origin, without neglecting the importance of collecting and taking into account social determinants of health and environmental factors.

Contribution of ethical reasoning learning sessions on medical training.

INTRODUCTION: Ethical reasoning is an important skill for all physicians who often face complex ethical dilemmas in their daily practice. Therefore, medical training should include methods for learning ethical theories and concepts, as well as how to apply them in practical situations. AIM: Assess the contribution of an Ethical Reasoning Learning session to fifth medical students' training through a comparison of results of the same objective and structured clinical examination (OSCE) in the form of simulated interview before and after sessions. METHODS: Four 45- minutes' sessions of Ethical Reasoning Learning (ERL) were implemented during a psychiatry internship for four groups of 5th-year students of the faculty of medicine of Monastir (Tunisia). Each session was divided into 7 parts: introduction, reading of a clinical vignette, brainstorming concerning the problems posed by this clinical situation, classification of the problems, identification of the principles of medical ethics, construction of the ethical matrix, and a conclusion. RESULTS: Fifty-seven students participated in the study divided into 4 groups. We found a significant difference in the means of the OSCE scores before and after the ERL session and a significant difference between the probability of respecting medical secrecy during pre and post-ethical reasoning learning sessions (p <0.001). We have found an effect of ERL sessions on the acquisition of this ethical competence by medical students. CONCLUSION: We learned that an ERL session has improved medical training in ethics applied to psychiatry. Other sessions dealing with other ethical skills are necessary to confirm these results.

Use of the International IFOMPT Cervical Framework to inform clinical reasoning in postgraduate level physiotherapy students: a qualitative study using think aloud methodology.

BACKGROUND: Vascular pathologies of the head and neck are rare but can present as musculoskeletal problems. The International Federation of Orthopedic Manipulative Physical Therapists (IFOMPT) Cervical Framework (Framework) aims to assist evidence-based clinical reasoning for safe assessment and management of the cervical spine considering potential for vascular pathology. Clinical reasoning is critical to physiotherapy, and developing high-level clinical reasoning is a priority for postgraduate (post-licensure) educational programs. OBJECTIVE: To explore the influence of the Framework on clinical reasoning processes in postgraduate physiotherapy students. METHODS: Qualitative case study design using think aloud methodology and interpretive description, informed by COnsolidated criteria for REporting Qualitative research. Participants were postgraduate musculoskeletal physiotherapy students who learned about the Framework through standardized delivery. Two cervical spine cases explored clinical reasoning processes. Coding and analysis of transcripts were guided by Elstein's diagnostic reasoning components and the Postgraduate Musculoskeletal Physiotherapy Practice model. Data were analyzed using thematic analysis (inductive and deductive) for individuals and then across participants, enabling analysis of key steps in clinical reasoning processes and use of the Framework. Trustworthiness was enhanced with multiple strategies (e.g., second researcher challenged codes). RESULTS: For all participants (n = 8), the Framework supported clinical reasoning using primarily hypothetico-deductive processes. It informed vascular hypothesis generation in the patient history and testing the vascular hypothesis through patient history questions and selection of physical examination tests, to inform clarity and support for diagnosis and management. Most participant's clinical reasoning processes were characterized by high-level features (e.g., prioritization), however there was a continuum of proficiency. Clinical reasoning processes were informed by deep knowledge of the Framework integrated with a breadth of wider knowledge and supported by a range of personal characteristics (e.g., reflection). CONCLUSIONS: Findings support use of the Framework as an educational resource in postgraduate physiotherapy programs to inform clinical reasoning processes for safe and effective assessment and management of cervical spine presentations considering potential for vascular pathology. Individualized approaches may be required to support students, owing to a continuum of clinical reasoning proficiency. Future research is required to explore use of the Framework to inform clinical reasoning processes in learners at different levels.

Improving clinical reasoning and communication during handover: An intervention study of the BRIEF-C tool.

BACKGROUND: Existing handover communication tools often lack a clear theoretical foundation, have limited psychometric evidence, and overlook effective communication strategies for enhancing diagnostic reasoning. This oversight becomes critical as communication breakdowns during handovers have been implicated in poor patient care. To address these issues, we developed a structured communication tool: Background, Responsible diagnosis, Included differential diagnosis, Excluded differential diagnosis, Follow-up, and Communication (BRIEF-C). It is informed by cognitive bias theory, shows evidence of reliability and validity of its scores, and includes strategies for actively sending and receiving information in medical handovers. DESIGN: A pre-test post-test intervention study. SETTING: Inpatient internal medicine and orthopaedic surgery units at one tertiary care hospital. INTERVENTION: The BRIEF-C tool was presented to internal medicine and orthopaedic surgery faculty and residents who participated in an in-person educational session, followed by a 2-week period where they practised using it with feedback. MEASUREMENTS: Clinical handovers were audiorecorded over 1 week for the pre- and again for the post-periods, then transcribed for analysis. Two faculty raters from internal medicine and orthopaedic surgery scored the transcripts of handovers using the BRIEF-C framework. The two raters were blinded to the time periods. RESULTS: A principal component analysis identified two subscales on the BRIEF-C: diagnostic clinical reasoning and communication, with high interitem consistency (Cronbach's alpha of 0.82 and 0.99, respectively). One sample t-test indicated significant improvement in diagnostic clinical reasoning (pre-test: M=0.97, SD=0.50; post-test: M=1.31, SD=0.64; t(64)=4.26, p<0.05, medium to large Cohen's d=0.63) and communication (pre-test: M=0.02, SD=0.16; post-test: M=0.48, SD=0.83); t(64)=4.52, p<0.05, large Cohen's d=0.83). CONCLUSION: This study demonstrates evidence supporting the reliability and validity of scores on the BRIEF-C as good indicators of diagnostic clinical reasoning and communication shared during handovers.

Critical Thinking and Clinical Reasoning in Undergraduate Medical Course: A Mixed-Methods Study in a Medical College in Kolkata, West Bengal, India.

Critical thinking is considered as the essential set of skills for medical practice, particularly during emergencies. However, there is lack of conceptual clarity around it and it was not explicitly included in the undergraduate medical curriculum in India. The present study has been planned to assess the critical thinking disposition and clinical reasoning skills among medical undergraduate students in a medical college in West Bengal, India. The perceived definition and attributes of critical thinking in medical education will be explored and the contexts where application of critical thinking skills may be crucial for medical practice will be identified. The content validity index, test-retest agreement; internal consistency and construct validity of the Critical Thinking Disposition Assessment Questionnaire (CTDAQ) will be assessed through step-by-step procedure. CTDAQ and the case-based objective-type questions for the clinical reasoning skills will be applied to around 200 medical undergraduate students. Their perception and experience on critical thinking in medical education will be assessed with structured open-ended questions. In-depth interviews with medical teachers of the second and third phases of undergraduate medical curriculum will be conducted to assess their perception and experiences on critical thinking. The quantitative analysis will be conducted with MS excel and R software using the relevant packages. The qualitative data will be transcribed and translated in English, close to the participants' verbatim. The thematic analysis will be conducted with inductive coding and memoing. The study will be conducted maintaining ethical standards for epidemiological studies. The present study, one of the first a few studies in India, will help to meet the conceptual gap in understanding the attributes of critical thinking, its association with clinical reasoning and the contexts of preferred application in medical practice.

Diagnosis: What Is the Structure of Its Reasoning?

How does the diagnosis process work? This essay traces the philosophical underpinnings of diagnosis from Hume through Kant, Peirce, and Popper, analyzing how pathologists amalgamate sensibility, intuition, and imagination to form new hypotheses that can be tested by evidence and experience.

Storylines of family medicine VIII: clinical approaches.

Storylines of Family Medicine is a 12-part series of thematically linked mini-essays with accompanying illustrations that explore the many dimensions of family medicine as interpreted by individual family physicians and medical educators in the USA and elsewhere around the world. In 'VIII: clinical approaches', authors address the following themes: 'Evaluation, diagnosis and management I-toward a working diagnosis', 'Evaluation, diagnosis and management II-process steps', 'Interweaving integrative medicine and family medicine', 'Halfway-the art of clinical judgment', 'Seamless integration in family medicine-team-based care', 'Technology-uncovering stories from noise' and 'Caring for patients with multiple long-term conditions'. May readers recognise in these essays the uniqueness of a family medicine approach to care.

Clinical Reasoning of a Generative Artificial Intelligence Model Compared With Physicians.

This cross-sectional study assesses the ability of a large language model to process medical data and display clinical reasoning compared with the ability of attending physicians and residents.

Embracing ChatGPT for Medical Education: Exploring Its Impact on Doctors and Medical Students.

ChatGPT (OpenAI), a cutting-edge natural language processing model, holds immense promise for revolutionizing medical education. With its remarkable performance in language-related tasks, ChatGPT offers personalized and efficient learning experiences for medical students and doctors. Through training, it enhances clinical reasoning and decision-making skills, leading to improved case analysis and diagnosis. The model facilitates simulated dialogues, intelligent tutoring, and automated question-answering, enabling the practical application of medical knowledge. However, integrating ChatGPT into medical education raises ethical and legal concerns. Safeguarding patient data and adhering to data protection regulations are critical. Transparent communication with students, physicians, and patients is essential to ensure their understanding of the technology's purpose and implications, as well as the potential risks and benefits. Maintaining a balance between personalized learning and face-to-face interactions is crucial to avoid hindering critical thinking and communication skills. Despite challenges, ChatGPT offers transformative opportunities. Integrating it with problem-based learning, team-based learning, and case-based learning methodologies can further enhance medical education. With proper regulation and supervision, ChatGPT can contribute to a well-rounded learning environment, nurturing skilled and knowledgeable medical professionals ready to tackle health care challenges. By emphasizing ethical considerations and human-centric approaches, ChatGPT's potential can be fully harnessed in medical education, benefiting both students and patients alike.

Enhancing clinical reasoning for management of non-communicable diseases: virtual patient cases as a learning strategy for nurses in primary healthcare centers: a pre-post study design.

BACKGROUND: In Rwanda, nurses manage all primary care at health centres, and therefore are their clinical reasoning skills important. In this study, a web-based software that allows the creation of virtual patient cases (VP cases) has been used for studying the possibility of using VP cases for the continuous professional development of nurses in primary health care in Rwanda. Previous studies in pre-service education have linked VP cases with the enhancement of clinical reasoning, a critical competence for nurses. This study investigated the feasibility of continuous professional development through VP cases to further train in-service nurses in clinical reasoning. METHOD: The study used a pre-post test design. Initially, seventy-six participants completed a questionnaire as part of the pre-test phase, subsequently invited to engage with all four VP cases, and finally responded to the post-test questionnaire evaluating clinical reasoning skills. Fifty-six participants successfully completed the entire study process and were considered in the analysis. The primary outcomes of this study were evaluated using a paired t-test for the statistical analysis. RESULTS: The results show that the mean score of clinical reasoning increased significantly from the pre-test to the post-test for all four illness areas (p < 0.001). The study findings showed no statistically significant difference in participants' scores based on demographic factors, including whether they worked in urban or rural areas.  CONCLUSION AND RECOMMENDATION: Utilizing VP cases appears to significantly enhance the continuous professional development of nurses, fostering a deliberate learning process that enables them to reflect on how they manage cases and, in turn, refine their clinical reasoning skills. This study strongly recommends incorporating VP cases in the continuous professional development of nurses at the primary health level (health centers). This is especially pertinent in a context where nurses are required to perform diagnostic processes similar to those employed by physicians.

High-fidelity simulation versus case-based discussion for training undergraduate medical students in pediatric emergencies: a quasi-experimental study.

OBJECTIVE: To evaluate the effect of high-fidelity simulation of pediatric emergencies compared to case-based discussion on the development of self-confidence, theoretical knowledge, clinical reasoning, communication, attitude, and leadership in undergraduate medical students. METHODS: 33 medical students were allocated to two teaching methods: high-fidelity simulation (HFS, n = 18) or case-based discussion (CBD, n = 15). Self-confidence and knowledge tests were applied before and after the interventions and the effect of HFS on both outcomes was estimated with mixed-effect models. An Objective Structured Clinical Examination activity was conducted after the interventions, while two independent raters used specific simulation checklists to assess clinical reasoning, communication, attitude, and leadership. The effect of HFS on these outcomes was estimated with linear and logistic regressions. The effect size was estimated with the Hedge's g. RESULTS: Both groups had an increase in self-confidence (HFS 59.1 × 93.6, p < 0.001; CDB 50.5 × 88.2, p < 0.001) and knowledge scores over time (HFS 45.1 × 63.2, p = 0.001; CDB 43.5 × 56.7, p-value < 0.01), but no difference was observed between groups (group*time effect in the mixed effect models adjusted for the student ranking) for both tests (p = 0.6565 and p = 0.3331, respectively). The simulation checklist scores of the HFS group were higher than those of the CBD group, with large effect sizes in all domains (Hedges g 1.15 to 2.20). CONCLUSION: HFS performed better than CBD in developing clinical reasoning, communication, attitude, and leadership in undergraduate medical students in pediatric emergency care, but no significant difference was observed in self-confidence and theoretical knowledge.

Clinical Reasoning: A 24-Year-Old Man With Gait Impairment, Hearing Loss, and Recurrent Fever.

We present a case study of a 24-year-old man who reported mild balance and walking difficulties for 2 years. He had a history of recurrent fever, skin lesions, headache, and elbow pain, but most of these events resolved spontaneously. There was no significant family history. On examination, we observed frontal bossing, sensorineural hearing loss, and gait ataxia. This case underscores the significance of identifying clinical indicators in patients with neurologic symptoms, particularly recurrent fever, to establish a precise and thorough differential diagnosis.

Virtual patients versus standardized patients for improving clinical reasoning skills in ophthalmology residents. A randomized controlled trial.

BACKGROUND: History taking and clinical reasoning are important skills that require knowledge, cognition and meta-cognition. It is important that a trainee must experience multiple encounters with different patients to practice these skills. However, patient safety is also important, and trainees are not allowed to handle critically ill patients. To address this issue, a randomized controlled trial was conducted to determine the effectiveness of using Virtual Patients (VP) versus Standardized Patients (SP) in acquiring clinical reasoning skills in ophthalmology postgraduate residents. METHODS: Postgraduate residents from two hospitals in Lahore, Pakistan, were randomized to either the VP group or the SP group and were exposed to clinical reasoning exercise via the VP or SP for 30 min after the pretest. This was followed by a posttest. One month after this activity, a follow-up posttest was conducted. The data were collected and analysed using IBM-SPSS version 25. Repeated measures ANOVA was used to track the effect of learning skills over time. RESULTS: The mean age of the residents was 28.5 ± 3 years. The male to female ratio was 1:1.1. For the SP group, the mean scores were 12.6 ± 3.08, 16.39 ± 3.01 and 15.39 ± 2.95, and for the VP group, the mean scores were 12.7 ± 3.84, 16.30 ± 3.19 and 15.65 ± 3.18 for the pretest, posttest and follow-up posttest, respectively (p value < 0.00). However, the difference between the VP and SP groups was not statistically significant (p = 0.896). Moreover, there was no statistically significant difference between the VP and SP groups regarding the retention of clinical reasoning ability. In terms of learning gain, compared with the VP group, the SP group had a score of 51.46% immediately after clinical reasoning exercise as compared to VP group, in which it was 49.1%. After one month, it was 38.01 in SP and 40.12% in VP group. CONCLUSION: VPs can be used for learning clinical reasoning skills in postgraduate ophthalmology residents in a safe environment. These devices can be used repeatedly without any risk to the real patient. Although similarly useful, SP is limited by its nonavailability for repeated exercises.

Clinical Reasoning: A 19-Month-Old Girl With Infantile-Onset Myopathy and White Matter Changes.

We describe the case of a 19-month-old girl presenting with gross motor delays, hypotonia, diminished deep tendon reflexes, hyperCKaemia, extensive white matter changes on MRI brain, and electromyography studies consistent with myopathy. The differential diagnosis for infantile-onset hypotonia and muscle weakness is broad. It includes numerous subtypes of genetic disorders, including congenital muscular dystrophies, congenital myopathies, congenital myasthenic syndromes, spinal muscular atrophy, single-gene genetic syndromes, and inborn errors of metabolism. We outline our clinical approach leading to the diagnosis of a distinctive genetic neuromuscular condition essential for neurologists and geneticists working with patients of all ages to recognize.

Characteristics differentiating problem representation synthesis between novices and experts.

BACKGROUND: Formulating a thoughtful problem representation (PR) is fundamental to sound clinical reasoning and an essential component of medical education. Aside from basic structural recommendations, little consensus exists on what characterizes high-quality PRs. OBJECTIVES: To elucidate characteristics that distinguish PRs created by experts and novices. METHODS: Early internal medicine residents (novices) and inpatient teaching faculty (experts) from two academic medical centers were given two written clinical vignettes and were instructed to write a PR and three-item differential diagnosis for each. Deductive content analysis described the characteristics comprising PRs. An initial codebook of characteristics was refined iteratively. The primary outcome was differences in characteristic frequencies between groups. The secondary outcome was characteristics correlating with diagnostic accuracy. Mixed-effects regression with random effects modeling compared case-level outcomes by group. RESULTS: Overall, 167 PRs were analyzed from 30 novices and 54 experts. Experts included 0.8 fewer comorbidities (p < .01) and 0.6 more examination findings (p = .01) than novices on average. Experts were less likely to include irrelevant comorbidities (odds ratio [OR] = 0.4, 95% confidence interval [CI] = 0.2-0.8) or a diagnosis (OR = 0.3, 95% CI = 0.1-0.8) compared with novices. Experts encapsulated clinical data into higher-order terms (e.g., sepsis) than novices (p < .01) while including similar numbers of semantic qualifiers (SQs). Regardless of expertise level, PRs following a three-part structure (e.g., demographics, temporal course, and clinical syndrome) and including temporal SQs were associated with diagnostic accuracy (p < .01). CONCLUSIONS: Compared with novices, expert PRs include less irrelevant data and synthesize information into higher-order concepts. Future studies should determine whether targeted educational interventions for PRs improve diagnostic accuracy.