1.Impact of car seat recline angle on global spinal alignment and seat belt positioning: a prospective observational study in Japan
Norihiro NISHIDA ; Tomohiro IZUMIYAMA ; Ryusuke ASAHI ; Hidenori SUZUKI ; Masahiro KOIKE ; Masahiro FUNABA ; Kazuhiro FUJIMOTO ; Yusuke ICHIHARA ; Yogesh KUMARAN ; Hiroshi HAMANO ; Shigeru SUGIMOTO ; Takashi SAKAI
Asian Spine Journal 2026;20(2):283-293
Methods:
Lateral radiographs were obtained from 100 healthy adults in standing and seated postures at 25°, 35°, and 45° recline angles. Spinal parameters (cervical lordosis, thoracic kyphosis, thoracolumbar kyphosis, lumbar lordosis, sacral slope, pelvic tilt, and T1 spinopelvic inclination) and seat belt metrics (X-value, Z-value, and lap belt angle) were measured. Multivariate regression was used to assess associations with sex, age, height, and body mass index (BMI).
Results:
Reclining reduced cervical/lumbar lordosis and sacral slope, while thoracic kyphosis and pelvic tilt increased. Higher BMI was associated with a cranially shifted and more horizontal lap belt. Taller individuals showed greater T1 spinopelvic inclination and pelvic parameters. Females exhibited more pronounced thoracic kyphosis and pelvic retroversion across reclining angles.
Conclusions
Car seat recline significantly alters spinal alignment and seat belt positioning, with changes influenced by age, height, and BMI. These findings support ergonomic improvements in seat design and may inform surgical planning for ASD.
2.Correlation between postoperative shoulder imbalance and distal adding-on and distal junctional kyphosis in Lenke type 2 adolescent idiopathic scoliosis: a retospective study
Norihiro ISOGAI ; Satoshi SUZUKI ; Nao OTOMO ; Yohei TAKAHASHI ; Masahiro OZAKI ; Toshiki OKUBO ; Osahiko TSUJI ; Narihito NAGOSHI ; Mitsuru YAGI ; Masaya NAKAMURA ; Morio MATSUMOTO ; Kota WATANABE
Asian Spine Journal 2026;20(2):272-282
Methods:
This study included 62 patients with Lenke type 2 AIS who underwent posterior correction and fusion surgeries. The patients were categorized into the PSI and non-PSI groups based on their radiographic shoulder height 2 years after surgery. Radiographic parameters, lower end vertebra (LEV), lower instrumented vertebra (LIV), sagittal stable vertebra (SSV), postoperative DA and DJK, and Scoliosis Research Society 22 scores were compared between the two groups using unpaired t -tests or Pearson’s chi-square tests.
Results:
Twenty-eight patients in the PSI group and 34 in the non-PSI group were evaluated. Three patients had DA in the PSI group and 10 with DA and four with DJK in the non-PSI group. LIV–LEV was higher in the PSI group than in the non-PSI group. Although the LIV–SSV was not significantly different between the two groups, among the three patients with DJK, two had LIV–SSV of −3, one had −1, and one had 0. No significant differences in other examinations were noted between the two groups.
Conclusions
Although more proximal LIV selection might lead to stable DA and DJK, the LIV selection should not be extended distally to prevent DA and DJK because favorable shoulder balance and clinical outcome can still be achieved.
3.Predictive Factors for Increased Bone Density Following Romosozumab Administration Based on Pre-Administration Blood Test Results
Akira KUWABARA ; Kazuhide INAGE ; Masaomi YAMASHITA ; Sumihisa ORITA ; Yawara EGUCHI ; Yasuhiro SHIGA ; Masahiro INOUE ; Miyako SUZUKI-NARITA ; Takahisa HISHIYA ; Takahito ARAI ; Noriyasu TOSHI ; Kohei OKUYAMA ; Soichiro TOKESHI ; Susumu TASHIRO ; Shuhei OHYAMA ; Noritaka SUZUKI ; Seiji OHTORI
Yonsei Medical Journal 2025;66(4):226-232
Purpose:
Romosozumab reportedly increases bone density in patients with severe osteoporosis; however, data on its clinical effects are limited. We conducted a multicenter retrospective survey to study the bone density-increasing effects of romosozumab and blood test-based predictive factors in patients with severe osteoporosis, examining its effects in clinical practice.
Materials and Methods:
This was a multicenter retrospective observational study. The subjects were patients with severe osteoporosis who were treated with romosozumab at the participating facilities. The increase in bone density was assessed by comparing bone density changes (as a percentage) in the lumbar spine, femoral neck, and total femur before and 12 months after administration using dual-energy X-ray absorptiometry. The association between changes in bone density at each site and pre-treatment bone metabolism markers (Tracp 5b, P1NP), serum calcium levels, nutritional status [Conut score: albumin, total cholesterol (TCho), and total lymphocyte count], and kidney function (eGFR) was assessed.
Results:
In both naïve patients and those switching from bone resorption inhibitors, the bone density increased significantly. In naïve patients, eGFR were positively associated with bone density in the total femur. In cases of switching from bone resorption inhibitors, correlations were found between Tracp 5b and lumbar spine bone mineral density (BMD), as well as between Tracp 5b, Alb, T-Cho, and eGFR in the total femur BMD.
Conclusion
Romosozumab administration significantly increases bone density in osteoporosis, and assessing key predictive factors is necessary to ensure clinical effectiveness.
4.Predictive Factors for Increased Bone Density Following Romosozumab Administration Based on Pre-Administration Blood Test Results
Akira KUWABARA ; Kazuhide INAGE ; Masaomi YAMASHITA ; Sumihisa ORITA ; Yawara EGUCHI ; Yasuhiro SHIGA ; Masahiro INOUE ; Miyako SUZUKI-NARITA ; Takahisa HISHIYA ; Takahito ARAI ; Noriyasu TOSHI ; Kohei OKUYAMA ; Soichiro TOKESHI ; Susumu TASHIRO ; Shuhei OHYAMA ; Noritaka SUZUKI ; Seiji OHTORI
Yonsei Medical Journal 2025;66(4):226-232
Purpose:
Romosozumab reportedly increases bone density in patients with severe osteoporosis; however, data on its clinical effects are limited. We conducted a multicenter retrospective survey to study the bone density-increasing effects of romosozumab and blood test-based predictive factors in patients with severe osteoporosis, examining its effects in clinical practice.
Materials and Methods:
This was a multicenter retrospective observational study. The subjects were patients with severe osteoporosis who were treated with romosozumab at the participating facilities. The increase in bone density was assessed by comparing bone density changes (as a percentage) in the lumbar spine, femoral neck, and total femur before and 12 months after administration using dual-energy X-ray absorptiometry. The association between changes in bone density at each site and pre-treatment bone metabolism markers (Tracp 5b, P1NP), serum calcium levels, nutritional status [Conut score: albumin, total cholesterol (TCho), and total lymphocyte count], and kidney function (eGFR) was assessed.
Results:
In both naïve patients and those switching from bone resorption inhibitors, the bone density increased significantly. In naïve patients, eGFR were positively associated with bone density in the total femur. In cases of switching from bone resorption inhibitors, correlations were found between Tracp 5b and lumbar spine bone mineral density (BMD), as well as between Tracp 5b, Alb, T-Cho, and eGFR in the total femur BMD.
Conclusion
Romosozumab administration significantly increases bone density in osteoporosis, and assessing key predictive factors is necessary to ensure clinical effectiveness.
5.Predictive Factors for Increased Bone Density Following Romosozumab Administration Based on Pre-Administration Blood Test Results
Akira KUWABARA ; Kazuhide INAGE ; Masaomi YAMASHITA ; Sumihisa ORITA ; Yawara EGUCHI ; Yasuhiro SHIGA ; Masahiro INOUE ; Miyako SUZUKI-NARITA ; Takahisa HISHIYA ; Takahito ARAI ; Noriyasu TOSHI ; Kohei OKUYAMA ; Soichiro TOKESHI ; Susumu TASHIRO ; Shuhei OHYAMA ; Noritaka SUZUKI ; Seiji OHTORI
Yonsei Medical Journal 2025;66(4):226-232
Purpose:
Romosozumab reportedly increases bone density in patients with severe osteoporosis; however, data on its clinical effects are limited. We conducted a multicenter retrospective survey to study the bone density-increasing effects of romosozumab and blood test-based predictive factors in patients with severe osteoporosis, examining its effects in clinical practice.
Materials and Methods:
This was a multicenter retrospective observational study. The subjects were patients with severe osteoporosis who were treated with romosozumab at the participating facilities. The increase in bone density was assessed by comparing bone density changes (as a percentage) in the lumbar spine, femoral neck, and total femur before and 12 months after administration using dual-energy X-ray absorptiometry. The association between changes in bone density at each site and pre-treatment bone metabolism markers (Tracp 5b, P1NP), serum calcium levels, nutritional status [Conut score: albumin, total cholesterol (TCho), and total lymphocyte count], and kidney function (eGFR) was assessed.
Results:
In both naïve patients and those switching from bone resorption inhibitors, the bone density increased significantly. In naïve patients, eGFR were positively associated with bone density in the total femur. In cases of switching from bone resorption inhibitors, correlations were found between Tracp 5b and lumbar spine bone mineral density (BMD), as well as between Tracp 5b, Alb, T-Cho, and eGFR in the total femur BMD.
Conclusion
Romosozumab administration significantly increases bone density in osteoporosis, and assessing key predictive factors is necessary to ensure clinical effectiveness.
6.Predictive Factors for Increased Bone Density Following Romosozumab Administration Based on Pre-Administration Blood Test Results
Akira KUWABARA ; Kazuhide INAGE ; Masaomi YAMASHITA ; Sumihisa ORITA ; Yawara EGUCHI ; Yasuhiro SHIGA ; Masahiro INOUE ; Miyako SUZUKI-NARITA ; Takahisa HISHIYA ; Takahito ARAI ; Noriyasu TOSHI ; Kohei OKUYAMA ; Soichiro TOKESHI ; Susumu TASHIRO ; Shuhei OHYAMA ; Noritaka SUZUKI ; Seiji OHTORI
Yonsei Medical Journal 2025;66(4):226-232
Purpose:
Romosozumab reportedly increases bone density in patients with severe osteoporosis; however, data on its clinical effects are limited. We conducted a multicenter retrospective survey to study the bone density-increasing effects of romosozumab and blood test-based predictive factors in patients with severe osteoporosis, examining its effects in clinical practice.
Materials and Methods:
This was a multicenter retrospective observational study. The subjects were patients with severe osteoporosis who were treated with romosozumab at the participating facilities. The increase in bone density was assessed by comparing bone density changes (as a percentage) in the lumbar spine, femoral neck, and total femur before and 12 months after administration using dual-energy X-ray absorptiometry. The association between changes in bone density at each site and pre-treatment bone metabolism markers (Tracp 5b, P1NP), serum calcium levels, nutritional status [Conut score: albumin, total cholesterol (TCho), and total lymphocyte count], and kidney function (eGFR) was assessed.
Results:
In both naïve patients and those switching from bone resorption inhibitors, the bone density increased significantly. In naïve patients, eGFR were positively associated with bone density in the total femur. In cases of switching from bone resorption inhibitors, correlations were found between Tracp 5b and lumbar spine bone mineral density (BMD), as well as between Tracp 5b, Alb, T-Cho, and eGFR in the total femur BMD.
Conclusion
Romosozumab administration significantly increases bone density in osteoporosis, and assessing key predictive factors is necessary to ensure clinical effectiveness.
7.Predictive Factors for Increased Bone Density Following Romosozumab Administration Based on Pre-Administration Blood Test Results
Akira KUWABARA ; Kazuhide INAGE ; Masaomi YAMASHITA ; Sumihisa ORITA ; Yawara EGUCHI ; Yasuhiro SHIGA ; Masahiro INOUE ; Miyako SUZUKI-NARITA ; Takahisa HISHIYA ; Takahito ARAI ; Noriyasu TOSHI ; Kohei OKUYAMA ; Soichiro TOKESHI ; Susumu TASHIRO ; Shuhei OHYAMA ; Noritaka SUZUKI ; Seiji OHTORI
Yonsei Medical Journal 2025;66(4):226-232
Purpose:
Romosozumab reportedly increases bone density in patients with severe osteoporosis; however, data on its clinical effects are limited. We conducted a multicenter retrospective survey to study the bone density-increasing effects of romosozumab and blood test-based predictive factors in patients with severe osteoporosis, examining its effects in clinical practice.
Materials and Methods:
This was a multicenter retrospective observational study. The subjects were patients with severe osteoporosis who were treated with romosozumab at the participating facilities. The increase in bone density was assessed by comparing bone density changes (as a percentage) in the lumbar spine, femoral neck, and total femur before and 12 months after administration using dual-energy X-ray absorptiometry. The association between changes in bone density at each site and pre-treatment bone metabolism markers (Tracp 5b, P1NP), serum calcium levels, nutritional status [Conut score: albumin, total cholesterol (TCho), and total lymphocyte count], and kidney function (eGFR) was assessed.
Results:
In both naïve patients and those switching from bone resorption inhibitors, the bone density increased significantly. In naïve patients, eGFR were positively associated with bone density in the total femur. In cases of switching from bone resorption inhibitors, correlations were found between Tracp 5b and lumbar spine bone mineral density (BMD), as well as between Tracp 5b, Alb, T-Cho, and eGFR in the total femur BMD.
Conclusion
Romosozumab administration significantly increases bone density in osteoporosis, and assessing key predictive factors is necessary to ensure clinical effectiveness.
8.Questionnaire Survey on Human Resources and Operational Conditions Associated with Drug Information (DI) Services in Medical Institutions
Takeshi UCHIKURA ; Takamasa SAKAI ; Noriko SAKAKIBARA ; Atsushi DAIKOH ; Masahiro OHBA ; Eriko SUGAYA ; Sumire SUZUKI ; Miho OHTAKE ; Susumu WAKABAYASHI
Japanese Journal of Drug Informatics 2024;26(1):8-18
Objective: The purpose of this survey is to identify the individuals responsible for providing drug information (DI) services in medical institutions across the nation and understand their work conditions. Method: This survey was conducted across medical institutions nationwide, each with at least 200 general hospital beds. The survey focused on personnel in charge of DI services at medical institutions. Results: Responses were collected from 181 facilities, representing a response rate of 13.7%. The median number of full-time equivalent DI personnel at each facility was 1.2 (ranging from 0.2 to 7 (n = 180)). Among the respondents, 90 (49.7%) individuals learned their DI responsibilities from their predecessors, 81 (44.8%) individuals learned through participation in academic societies (excluding the Japanese Society for Drug Information), and 61 (33.7%) individuals gained their knowledge from academic journals, with these methods listed in their order of prevalence. The most sought-after knowledge and skills for DI personnel included the knowledge of adverse drug reaction reporting system (134 (74.0%)), basic PC skills (130 (71.8%)), knowledge of medical fees (128 (70.7%)), and expertise in disease treatment methods (125 (69.1%)). Results and Conclusion: The findings of the survey revealed that several medical institutions with 200 or more beds have only one or two individuals in charge of DI duties. Apart from their core role in drug information, the DI staff members are expected to possess extensive knowledge concerning medical fees and related matters. However, they predominantly rely on their skills for DI operations. The tasks identified in the survey are tasks that are presently being performed by DI personnel at medical institutions. This underscores the pressing need for immediate attention to be given to acquiring the essential knowledge and education required for these tasks.
9.Effective Multidisciplinary Collaboration Involving Rehabilitation Treatment, Nutrition, and Medication Management for Patients with Parkinson Disease with Fatigue and Dysautonomia:A Case Report
Keisuke YASUDA ; Syuuichirou SUZUKI ; Keigo OKUYAMA ; Youko HATANAKA ; Yuri KASHIWAGI ; Masahiro AOKI
The Japanese Journal of Rehabilitation Medicine 2024;():23053-
Introduction:Here we report the case of a patient with Parkinson disease (PD) who showed improved physical function and non-motor symptoms, including fatigue and dysautonomia, through a multidisciplinary collaboration involving rehabilitation treatment, nutrition, and medication management.Case:A 77-year-old woman with PD was hospitalized for condition assessment and environmental adjustments and complained of fatigue and dizziness. She presented with decreased physical function, sarcopenia, orthostatic hypotension, and an impaired circulatory response during exercise. A multidisciplinary conference was conducted to address these issues, and we decided to implement rehabilitation treatment, nutrition, and medication management.The rehabilitation program consisted of 1 h/day physiotherapy sessions involving stretching exercises, muscle-strengthening exercises, and walking training. Because she often made medication administration errors, a nurse managed them on her behalf. Nutrition management was established to ensure sufficient energy for her total energy expenditure.At discharge, a notable improvement was recorded in Part 1 of the Movement Disorder Society Unified Parkinson's Disease Rating Scale, and the patient's complaints of fatigue and dizziness had subsided. Additionally, physical function measures such as skeletal muscle mass, comfortable walking speed over a 10-m distance, 6-min walking distance, and Berg Balance Scale score improved. To optimize the patient's home environment, home nursing, home-visit rehabilitation, and meal delivery services were introduced to manage her medication and nutritional needs.Discussion:In addition to rehabilitation treatment, the reconsideration of a patient's daily living activities, such as taking medications and meals, is important for improving their physical function and non-motor symptoms including fatigue and dysautonomia.
10.Association between quality of motion and motor ability in early childhood
Yusuke KUROKAWA ; Masahiro MATSUI ; Hidetada KISHI ; Hiroyuki MIYATA ; Koya SUZUKI
Japanese Journal of Physical Fitness and Sports Medicine 2024;73(2):75-83
The purpose of this study was to clarify the relationship between quality of motion and motor ability in early childhood, as well as the moderating effects of grade and gender. A total of 133 preschoolers (3- to 5-year-old class) were evaluated for quality of motion and motor ability using the “Athletic Aptitude Test II” developed by the Japan Sports Association to assess the fundamental movements of running, jumping, and throwing. Two observers evaluated quality of motion based on movies taken by tablet. The relationship between quality of motion and motor ability was determined using multiple regression analysis. In addition, we clarified the influence of grade and gender on the relationship between quality of motor and motor ability using moderation analysis. A significant relationship was found between quality of motion and motor ability for all movements. Grade moderated the relationship between the quality of running motion and the results of the 25-m run. Gender moderated the relationship between the quality of the throwing motion and the results of softball throwing. These results suggest an association between quality of motion and motor ability in early childhood, and show that improving quality of motion improves motor ability.


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