Objective: This study aimed to identify the characteristics of cases in which walking level improves even in the later stages of convalescent rehabilitation, and to predict such cases.Methods: The Walking LEVEL Scale (WaLS) was measured over time in 192 patients (brain-related and orthopedic diseases) admitted to a convalescent rehabilitation ward. The “delayed recovery group (DR)” was defined as the group showing improvement of WaLS in the later period, while the “non-delayed recovery group (NDR)” was defined as the group for whom improvement of WaLS did not extend into the same period. Then, changes in WaLS over time and each factor were compared to identify differences between DR and NDR. Using receiver operating characteristic analysis, cutoff values, sensitivity and specificity, likelihood ratios for the relevant factors were calculated and examined for the predictability of DR utilizing Bayesian estimation.Results: WaLS temporal changes showed a sigmoid curve only in the DR of brain-related disease. Other groups showed logarithmic curves. The WaLS score at admission was selected as a significant variable. The positive and negative likelihood ratios for the score at cutoff values of 4 or less were 2.00 and 0.19 for brain-related disease, and 1.49 and 0.63 for orthopedic disease, respectively. Adopting the DR frequency of the participants in this study as the prior probability, the DR posterior probability of brain-related disease was calculated to be 5% using the negative likelihood ratio.Conclusion: The negative likelihood ratio of the WaLS score at admission is useful for predicting DR for brain-related disease.

Objective: To clarify the characteristics of medical students' motives for choosing their profession.Methods: A nationwide, cross-sectional, quantitative web survey was conducted using the Profession Choice Motivation Scale for Education Students. Results: Valid responses were obtained from 1,804 medical students, and the applicability of this scale was demonstrated. Medical students considered "contribution to others," "fulfillment in the profession and studying medicine," "financial aspects," and "evaluation by others" to be important, while "mental and physical comfort" was deemed less important. Mean scores for "contribution to others" were significantly higher among female students, public medical school students, students attending their first- or second-choice medical schools, regional quota students, public high school graduates, and first-generation college students. Conversely, students with very low scores for "contribution to others" showed opposite demographic backgrounds. Discussion: The Profession Choice Motivation Scale for Education Students was applicable to the analysis of medical students, and a correlation was observed between demographic backgrounds and profession choice motives.

BACKGROUND: Mitochondria, which harbor their own genome (mtDNA), have attracted attention due to the potential of mtDNA copy number (mtDNA-CN) as an indicator of mitochondrial dysfunction. Although mtDNA-CN has been proposed as a simple and accessible biomarker for metabolic disorders such as metabolic dysfunction-associated steatotic liver disease, the underlying mechanisms and the causal relationship remain insufficiently elucidated. In this investigation, we combined longitudinal epidemiological data, animal studies, and in vitro assays to elucidate the potential causal relationship between reduced mtDNA-CN and the development of steatotic liver disease (SLD). METHODS: We conducted a longitudinal study using data from a health examination cohort initiated in 1981 in Yakumo, Hokkaido, Japan. Data from examinations performed in 2015 and 2022 were analyzed, focusing on 76 subjects without SLD at baseline (2015) to assess the association between baseline mtDNA-CN and subsequent risk of SLD development. In addition, 28-day-old SD rats were fed ad libitum on a 45% high-fat diet and dissected at 2 and 8 weeks of age. Blood and liver mtDNA-CN were measured and compared at each feeding period. Additionally, in vitro experiments were performed using HepG2 cells treated with mitochondrial function inhibitors to induce mtDNA-CN depletion and to examine its impact on intracellular lipid accumulation. RESULTS: Epidemiological analysis showed that the subjects with low mtDNA-CN had a significantly higher odds ratio for developing SLD compared to high (odds ratio [95% confidence interval]: 4.93 [1.08-22.50]). Analysis of the animal model showed that 8 weeks of high-fat diet led to the development of fatty liver and a significant decrease in mtDNA-CN. A further 2 weeks of high-fat diet consumption resulted in a significant decrease in hepatic mtDNA-CN, despite the absence of fatty liver development, and a similar trend was observed for blood. Complementary in vitro experiments revealed that pharmacologically induced mitochondrial dysfunction led to a significant reduction in mtDNA-CN and was associated with increases in intracellular lipid accumulation in HepG2 cells. CONCLUSIONS Our findings suggest that reduced mtDNA-CN may contribute causally to SLD development and could serve as a convenient, noninvasive biomarker for early detection and risk assessment.
Animals ; DNA, Mitochondrial/genetics* ; Humans ; Male ; DNA Copy Number Variations ; Female ; Fatty Liver/blood* ; Rats ; Middle Aged ; Longitudinal Studies ; Rats, Sprague-Dawley ; Adult ; Japan/epidemiology* ; Aged ; Biomarkers/blood* ; Hep G2 Cells ; Diet, High-Fat/adverse effects*

Background : Health Advocacy (HA) is an important competency for physicians, but education in this area remains underdeveloped in Japan. This study aimed to qualitatively analyze the educational effects of the Child Advocacy Training (CHAT) program designed for pediatric residents in Japan and to derive implications for future educators.　Methods : Semi-structured interviews were conducted with six pediatric residents who participated in all sessions of CHAT after program completion. The obtained transcripts were analyzed using thematic analysis.　Results : Three categories and 12 themes were extracted : “Deepening of Conceptual Understanding,” “Expansion and Quality Improvement of Practice Content,” and “Expansion of Considerations for Practice Environment.” Participants demonstrated long-term understanding of HA concepts, acquired the ability to systematically combine HA methods, and developed changes in their practical environment. Additionally, they gained perspectives on educational recall and educational expansion.　Discussion : Through CHAT learning, participants not only acquired superficial HA knowledge and skills but were also confirmed to engage in self-reflection and form new values or reconstruct existing ones, suggesting the possibility that CHAT promotes the experiential learning cycle.　Conclusion : The CHAT program may promote awareness and behavioral transformation related to the HA role and serve as a foundation for developing practical HA competencies through experiential learning cycles.

Objective: This study investigated and compared the responsiveness of the Walking LEVEL Scale (WaLS), Functional Independence Measure (FIM)-walk item, and Functional Ambulation Category (FAC) in patients hospitalized in a Convalescent Rehabilitation Ward (CRW).Methods: One hundred three patients participated in this study. Physical or occupational therapists assessed the three scales at two times of admission and discharge to determine the responsiveness. The amount of change, ceiling and floor effect, Effect Size (ES), and Standardized Response Mean (SRM) determined the responsiveness to change from admission to discharge. Their analysis was by severity and disease.Results: The amount of change in WaLS was larger than that of the FIM-walk item and FAC, except for the moderate gait disability group. More ceiling and floor effects were observed in FIM-walk item evaluation. Regardless of severity or disease, all rating scales showed moderate or better responsiveness (ES > 0.5). When ceiling or floor effects were observed, ES tended to be overestimated. The SRM of WaLS was larger than that of the other scales, except for the mild gait disability group.Conclusion: The results support WaLS as the most suitable instrument to detect walking level changes over time for patients in CRW.

Objective: To determine the socio-economic and educational backgrounds of first-generation college students (FGCs) among Japanese medical students, with the aim of contributing to the improvement of medical school admissions.　Methods: A nationwide cross-sectional online questionnaire survey was conducted. A total of 1,849 medical students and 295 nursing students participated.　Results: The proportion of FGCs among medical students was 12.1%, lower than that among nursing students (39.4%). The backgrounds of FGCs were compared with those of non-FGCs (students whose parents were university graduates). FGCs were more likely to come from small cities and from outside the Kanto/Kansai regions. They reported lower annual family incomes and had fewer doctors or dentists among their relatives. FGCs attended cram schools less frequently, were more likely to have graduated from national or public high schools, and had higher academic grades. They applied exclusively to national or public medical schools, were more likely to take regional quota or recommended AO entrance examinations, passed these exams immediately after high school graduation, and were more often enrolled in their first-choice and national or public medical schools. FGCs also expressed a stronger intention to work in less-populated areas in the future.　Discussion: The backgrounds of FGCs differ significantly from those of non-FGCs. Further investigation into the challenges and potential of FGCs in medicine is warranted.

OBJECTIVE: To examine the socioeconomic backgrounds of medical students who intend to practice in less-populated areas.METHODS: A nationwide online questionnaire survey was conducted among 1,822 Japanese medical students (1,024 from public universities and 798 from private universities) across 40 medical schools.RESULTS: Regarding preferred future practice locations, 25.2% of students intended to work in areas with populations over 1,000,000; 36.8% in areas with 200,000-1,000,000; 17.2% in areas with 50,000-200,000; and 4.8% in areas with fewer than 50,000 residents. Students who intended to work in less-populated areas (population >200,000) were more likely to have grown up in such areas, come from families with lower annual incomes, have fewer physician parents, have graduated from public high schools, and be enrolled in regional quota programs. Logistic regression analysis identified having a family background in a less-populated area (OR 9.46) and enrollment in a regional quota program (OR 2.72) as significant predictors of the intention to work in less-populated areas.DISCUSSION: There is a correlation between medical students’ intentions to work in less-populated areas and their socioeconomic backgrounds, which are important factors to consider when addressing the uneven distribution of physicians in Japan.

Many post-treatment cancer patients complain of persistent fatigue, which is known to have a significant impact on activities of daily living, quality of life, and reinstatement. We report a case of a 37-year-old man with acute myeloid leukemia (AML) who was able to return to work by performing High-Intensity Interval Training (HIIT) after the remission. The diagnosis of AML was made and the treatment started in January X, and the patient reached remission and discharged in June. However, he developed herpes zoster and was unable to return to his job. The patient was referred to our hospital for rehabilitation treatment in December X. The rehabilitation treatment included 40-min HIIT twice a week and commuting practice, as well as gradual support for return-to-work. Cardiopulmonary function improved from 19.2 to 25.7 mL/min/kg of oxygen uptake at anaerobic metabolic threshold, lower limb muscle strength improved from 0.47/0.48 to 0.60/0.55 kgf/kg of knee extension muscle strength ratio (right/left), physical function improved from 14 to 24 times in 30-second chair stand test, Cancer Fatigue Scale improved from 46 to 25 points, and the patient was able to work full time in May X＋1. HIIT improved cardiopulmonary function, muscle strength, physical function, and fatigue, and enabled the patient to return to work. Even after remission, some patients have difficulty returning to work. The results suggest that appropriate follow-up, exercise guidance, and rehabilitation therapy are necessary even after treatment.

Objective: Perceptions of citizens and health professions educators towards the socioeconomic backgrounds of medical students were investigated to elucidate the challenges of selecting medical students who will be responsible for the future of healthcare in Japan.Methods: Ten focus groups, comprising 14 citizens and 26 health professions educators, were conducted regarding the presented information on the socioeconomic backgrounds of Japanese medical students. Data were analyzed using an inductive thematic analysis approach.Results: Six themes related to family backgrounds, such as higher economic status, five themes related to social backgrounds, such as social and educational disparity, and four themes related to expectations for medical education, such as selection of medical students with diverse backgrounds were extracted.Discussion: Both citizens and health professions educators were aware of the problem of the skewed socioeconomic backgrounds of medical students and the need to expand diversity. This finding will contribute to the reconsideration of future medical school admission criteria.

Many post-treatment cancer patients complain of persistent fatigue, which is known to have a significant impact on activities of daily living, quality of life, and reinstatement. We report a case of a 37-year-old man with acute myeloid leukemia (AML) who was able to return to work by performing High-Intensity Interval Training (HIIT) after the remission. The diagnosis of AML was made and the treatment started in January X, and the patient reached remission and discharged in June. However, he developed herpes zoster and was unable to return to his job. The patient was referred to our hospital for rehabilitation treatment in December X. The rehabilitation treatment included 40-min HIIT twice a week and commuting practice, as well as gradual support for return-to-work. Cardiopulmonary function improved from 19.2 to 25.7 mL/min/kg of oxygen uptake at anaerobic metabolic threshold, lower limb muscle strength improved from 0.47/0.48 to 0.60/0.55 kgf/kg of knee extension muscle strength ratio (right/left), physical function improved from 14 to 24 times in 30-second chair stand test, Cancer Fatigue Scale improved from 46 to 25 points, and the patient was able to work full time in May X＋1. HIIT improved cardiopulmonary function, muscle strength, physical function, and fatigue, and enabled the patient to return to work. Even after remission, some patients have difficulty returning to work. The results suggest that appropriate follow-up, exercise guidance, and rehabilitation therapy are necessary even after treatment.