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Papers - Baba, Mineko

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交通事故削減と社会変容に向けた先進運転支援・自動運転システムの現状と法的課題.

馬塲美年子, 一杉正仁

日本交通科学学会誌 25 ( 1 ) 19 - 30 2025.12

Lead author, Accepted

わが国における運転支援技術を搭載した車両による交通死傷事故の事例検討-事故態様と刑事責任について-

馬塲美年子、一杉正仁

日本交通科学学会誌 25 ( 1 ) 3 - 18 2025.12

Lead author, Accepted

Characteristics of Pediatric Dental Injuries and Predictive Factors for Long Treatment Duration

Sakamoto Y., Baba M., Kosinuma S., Takaoka K., Nakamura M., Hitosugi M.

Clinical and Experimental Dental Research 11 ( 5 ) 2025.10

Objectives: This study was performed to identify the characteristics of oral and maxillofacial injuries in children and determine factors influencing a treatment duration of more than 1 month using medical records. Material and Methods: This retrospective observational study reviewed medical records of 258 children (< 16 years of age) with maxillofacial trauma treated at a university hospital between 2011 and 2021. Patients with and without tooth fractures or dislocations were compared, and the prevalence of injuries was analyzed across three age groups (0–2, 3–5, ≥ 6 years). Long (> 1 month) and short (< 1 month) treatment durations were compared, and independent predictive factors for prolonged treatment were identified. Results: Tooth injuries were observed in 204 (79.1%) patients. Deciduous central incisors in the primary dentition and central incisors in the permanent dentition were the most commonly affected. Soft tissue injuries occurred in 165 (64.0%) patients, while maxillofacial fractures were present in 7 (2.7%). Tooth fractures significantly increased with age (p < 0.001), while dislocations showed no age-related differences. Logistic regression revealed that maxillofacial fractures, tooth fractures, and two or more dislocated teeth were independent predictors of prolonged treatment, with odds ratios of 14.666 (1.625–132.359), 2.411 (1.099–5.287), and 2.350 (1.208–4.570), respectively. Conclusions: Maxillofacial fractures, multiple tooth dislocations, and tooth fractures were confirmed as key factors influencing longer treatment durations. These findings may assist in the early management of maxillofacial injuries and improve communication with pediatric patients and their families.

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Motor Vehicle Driving-Related Anxiety in Patients Undergoing Cardioverter Defibrillator Implantation and Cardiac Resynchronization Therapy With Defibrillators

Moriguchi S., Hitosugi M., Takeuchi Y., Inoue T., Takeda S., Baba M., Takeda A., Nakamura M., Inuzuka Y.

Annals of Noninvasive Electrocardiology 29 ( 5 ) 2024.09

ISSN 1082720X

Background: Reducing anxiety about motor vehicle driving in patients receiving implantable cardioverter defibrillators and cardiac resynchronization therapy with defibrillators is important not only for improving quality of life but also for preventing vehicle collisions owing to driver distraction. This study aimed to clarify the driving-related anxiety of patients with these defibrillators and the factors that predict such anxiety. Methods: We conducted a cross-sectional survey using a self-administered questionnaire of patients who had been driving a vehicle after device implantation at a general hospital between August 2018 and November 2019. Results: The mean age was 60.8 ± 12.6 years. The reasons for implantation were primary prevention in 47 patients and secondary prevention in 30 patients. A total of 16 patients experienced anxiety about driving and 61 did not. Significantly more younger patients (mean age of 50.4 vs. 63.6 years, p < 0.001) and those with implantable cardioverter defibrillators had anxiety (100% vs. 73.8%, p = 0.02). Multivariable analysis indicated that age was the only independent factor that predicted driving-related anxiety (odds ratio, 0.937; 95% confidence interval, 0.883–0.993). Conclusions: Identifying and addressing driving-related anxiety in patients (particularly young patients) with defibrillators is important in preventing motor vehicle collisions and improving quality of life.

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Predictive Factors of the Fatality of Motor Vehicle Passengers Involved in Far-Side Lateral Collisions: A National Crash Database Study

Masumitsu A., Hitosugi M., Baba M., Nakamura M., Koike K., Ida H., Aoki M.

Healthcare (Switzerland) (Healthcare (Switzerland)) 11 ( 10 ) 2023.05

Although the risks faced by passengers in near-side lateral collisions are understood, and despite the presence of side airbags for injury prevention, passengers involved in far-side lateral collisions also suffer serious and fatal injuries. The objective of this study was to determine the independent predictive factors of fatality of motor vehicle passengers involved in far-side lateral collisions. Using 2010 records from the National Automotive Sampling System/Crashworthiness Data System (NASS/CDS), we selected 86 fatal and 325 non-fatal passengers with an Abbreviated Injury Scale (AIS) score of 2 or more. The background and injury severity of the passengers and collision characteristics were compared between the two groups. In a multivariable logistic regression analysis, variables independently associated with fatalities were female sex (Ref, male) (odds ratio [OR], 0.396), age (OR, 1.029), body mass index (OR, 1.057), total delta-V (OR, 1.031), head AIS score (OR, 1.679), chest AIS score (OR, 1.330), and abdomen AIS score (OR, 1.294). This is the first report to determine factors affecting fatality in passengers involved in far-side lateral collisions. Improving the safety of the vehicle interior, such as by including additional seatbelt systems or a side airbag that deploys between seats, might help to avoid fatalities, and reduce injury severity.

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職業運転者の傷病と復職について

馬塲美年子, 一杉正仁

日本交通科学学会誌 22 ( 2 ) 15 - 29 2023.02

Lead author, Accepted

Availability of death review of children using death certificates and forensic autopsy results

Ito E., Hitosugi M., Maruo Y., Nakamura M., Takaso M., Masumitsu A., Baba M.

Legal Medicine (Legal Medicine) 60 2023.02

ISSN 13446223

The Model Project for Child Death Review (CDR) was initiated in Japan, but parental consent is required for detailed investigations. We proposed an alternative method to review child deaths using death certificates and forensic autopsy results when parental consent is not provided. We extracted and reviewed death certificates for the deceased younger than 18 years from among all certificates submitted in Shiga Prefecture between 2015 and 2017. In addition, we analyzed autopsy records in cases that underwent forensic autopsy. The prevalence of each cause of death was compared among age groups. The situation and circumstances of unnatural deaths were analyzed in detail. Of 131 certificates, unnatural deaths accounted for 29.7 %. The prevalence of each cause of death significantly differed among age groups. Malignant disease and suicide were most common in school-aged children and congenital disease was most common in infants. Suicide was the leading cause of unnatural death, followed by suffocation, which was most common in infants. Situations where suffocation was reported included co-sleeping with the mother and breastfeeding. Despite parental consent not being obtained, the trends of regional child deaths and the circumstances of accidental deaths were clarified by the present method. However, the results of detailed investigation were lacking. This study provided basic information for implementing detailed methods and procedures for CDR at the governmental level. To perform optimal CDR, legislation for collecting detailed information without parental consent is required.

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睡眠障害の影響が疑われた自動車事故例の検討 -新法施行前後の比較を踏まえた考察-

馬塲美年子

日本交通科学学会誌 22 ( 1 ) 3 - 13 2022.09

Research paper (scientific journal), Lead author, Accepted

てんかん発作に起因した自動車事故事例刑事処分からの検討:新法施行前後の比較を踏まえた考察

馬塲美年子, 一杉正仁

てんかん研究 39 ( 3 ) 2022.01

Research paper (scientific journal), Lead author, Last author, Corresponding author, Accepted

Analysis of Vehicle Collision Cases in Criminal Court following an Epileptic Fit of the Driver: A Comparative Study before and after the Enforcement of the New Law (Act on Punishment of Acts Inflicting Death or Injury on Others by Driving a Motor Vehicle, etc.)

Baba M., Hitosugi M.

Journal of the Japan Epilepsy Society (Journal of the Japan Epilepsy Society) 39 ( 3 ) 489 - 499 2022

ISSN 09120890

We investigated the real data regarding vehicle collisions due to an epileptic attack and the criminal liability of drivers after the implementation of the “Act on Punishment of Acts Inflicting Death or Injury on Others by Driving a Motor Vehicle, etc.”. Moreover, circumstances of the cases before and after the new law implementation were compared. The enforcement of the new law was meant to toughen the law for an appropriate effect. Nearly 90% of 26 cases were indicted for “Dangerous Driving Causing Death or Injury”. Out of theses cases, 19 drivers were found guilty, three were not proven guilty, and four were exempted from prosecution. Although the number of epileptic drivers supervised by a doctor is significantly increasing, some drivers disrespected this evaluation or discontinued the prescribed drugs. Hence, drivers with epilepsy require careful attention and supervision by a doctor. Furthermore, it would be critical to facilitate epilepsy diagnosis in the elderly because of the high rate of onset of epilepsy.

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Factors influencing the injury severity score and the probability of survival in patients who fell from height

Fujii M., Shirakawa T., Nakamura M., Baba M., Hitosugi M.

Scientific Reports (Scientific Reports) 11 ( 1 ) 2021.12

In Japan, falls from height result in the second highest trauma mortality rate after traffic motor vehicle collisions and the highest trauma-related mortality rate amongst young people. We aimed to identify factors that worsen injury severity and lower survival probability of patients who fell from height and to contribute to the improvement of their prehospital and in-hospital care. This retrospective analysis retrieved hospital records of 179 patients aged ≥ 15 years who were transported to our hospital after a fall from height during April 2014–March 2020. On multiple regression analysis, fall height ≥ 5 m more significantly resulted in higher the injury severity score. Logistic regression analysis revealed that fall height ≥ 5 m with the reference of 2–3 m significantly resulted in lower the survival probability with odds ratio (95% confidence interval) of 0.10 (0.02–0.55). Using ‘feet-first’ as the reference body position, the odds ratios (95% confidence interval) of survival for those who impacted the surface on the lateral or dorsal regions were 0.11 (0.02–0.64) and 0.17 (0.03–0.99), respectively. Collecting information on the abovementioned factors at pre-hospitalisation may facilitate prompt diagnosis and treatment. These results may help improve prehospital and in-hospital care, avoiding preventable trauma deaths.

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Factors affecting death and severe injury in child motor vehicle passengers

Ishii W., Hitosugi M., Baba M., Kandori K., Arai Y.

Healthcare (Switzerland) (Healthcare (Switzerland)) 9 ( 11 ) 2021.11

Saving children from motor vehicle collisions is a high priority because the injury rate among motor vehicle passengers has been increasing in Japan. This study aimed to examine the factors that influence death and serious injury in child motor vehicle passengers to establish effective preventive measures. To identify these factors, we performed a retrospective study using a nationwide medical database. The data of child motor vehicle passengers younger than 15 years (n = 1084) were obtained from the Japanese Trauma Data Bank, registered from 2004 to 2019. Physiological variables, outcomes, and injury severity were compared between fatal and non-fatal patients and between those with and without severe injuries. Multivariate logistic regression analysis was performed to determine factors affecting fatality and severe injury. The Glasgow Coma Scale score (odds ratio (OR): 1.964), body temperature (OR: 2.578), and the Abbreviated Injury Scale score of the head (OR: 0.287) were identified as independent predictors of a non-fatal outcome. Systolic blood pressure (OR: 1.012), the Glasgow Coma Scale score (OR: 0.705), and Focused Assessment with Sonography for Trauma positivity (OR: 3.236) were identified as independent predictors of having severe injury. Decreasing the severity of head injury is the highest priority for child motor vehicle passengers to prevent fatality and severe injury.

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Comparison of motor vehicle collision injuries between pregnant and non-pregnant women: A nationwide collision data-based study

Koh S., Hitosugi M., Moriguchi S., Baba M., Tsujimura S., Takeda A., Takaso M., Nakamura M.

Healthcare (Switzerland) (Healthcare (Switzerland)) 9 ( 11 ) 2021.11

We compared the independent predictive factors for moderate and severe injuries, along with characteristics and outcomes of motor vehicle collisions, between pregnant and non-pregnant women. Using 2001–2015 records from the National Automotive Sampling System/Crashworthiness Data System, we selected 736 pregnant women and 21,874 non-pregnant women having any anatomi-cal injuries. Pregnant women showed less severe collisions, fewer fatalities, and less severe injuries in most body regions than non-pregnant women. In pregnant women, the rate of sustaining abbreviated injury scale (AIS) scores 2+ injuries was higher for the abdomen only. For non-pregnant women, rear seat position, airbag deployment, multiple collisions, rollover, force from the left, and higher collision velocity had a positive influence on the likelihood of AIS 2+ injuries, and seatbelt use and force from the rear had a negative influence. There is a need for further development of passive safety technologies for restraint and active safety features to slow down vehicles and mitigate collisions. The influencing factors identified may be improved by safety education. Therefore, simple and effective interventions by health professionals are required that are tailored to pregnant women.

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Factors influencing the long-term hospitalization of bicyclists and motorcyclists with oral and maxillofacial injuries

Hirobe Y., Koshinuma S., Nakamura M., Baba M., Yamamoto G., Hitosugi M.

Dental Traumatology (Dental Traumatology) 37 ( 2 ) 234 - 239 2021.04

ISSN 16004469

Background/Aim: Because bicyclists and motorcyclists with oral and maxillofacial injuries often suffer from disabilities requiring long-term treatment, reducing the severity of such injuries is a valuable objective for improving these people's quality of life (QOL). The aims of this study were, first, to present the prevalence and patterns of oral and maxillofacial injuries of bicyclists and motorcyclists and to compare the features of these injuries and, second, to determine the factors contributing to long-term hospitalization for these patients and to propose effective preventive measures. Material and Methods: This was a single-center retrospective analysis. Hospital records from 2011 through 2018 were reviewed for all patients who had sustained oral and maxillofacial injuries in bicycle or motorcycle collisions and had presented at a university hospital which was the only hospital in the region attended 24 hours per day by oral and maxillofacial surgeons. Characteristics of the oral and maxillofacial injuries, injury severity, and factors influencing the length of hospitalization were examined. Results: Records of 130 patients (82 bicyclists and 48 motorcyclists) with a mean age of 28.0 years were analyzed. Thirty-three patients (25.4%) had maxillofacial fractures, with 41 fracture lines while 103 patients (79.2%) had dental injuries and 57 patients (43.8%) had soft-tissue injuries. The distribution and prevalence of oral and maxillofacial injuries were similar for bicyclists and motorcyclists. However, motorcyclists had significantly higher Abbreviated Injury Scale (AIS) scores for facial injuries and the maximum AIS score than did bicyclists. According to a multiple regression analysis, the number of fracture lines and the requirement for intermaxillary fixation were independent factors influencing long-term hospitalization (standard regression coefficients: 6.795 and 6.715, respectively; P <.001). Conclusions: The number of fracture lines and the use of intermaxillary fixation were independent factors influencing long-term hospitalization of both bicyclists and motorcyclists with oral and maxillofacial injuries.

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Factors influencing pregnant women’s injuries and fetal loss due to motor vehicle collisions: A national crash data-based study

Hattori S., Hitosugi M., Moriguchi S., Baba M., Takaso M., Nakamura M., Tsujimura S., Miyata Y.

Healthcare (Switzerland) (Healthcare (Switzerland)) 9 ( 3 ) 2021.03

To examine the factors that influence substantial injuries for pregnant women and negative fetal outcomes in motor vehicle collisions (MVCs), a retrospective analysis using the National Automotive Sampling System/Crashworthiness Data System was performed in Shiga University of Medical Science. We analyzed data from 736 pregnant women who, between 2001 and 2015, had injuries that were an abbreviated injury scale (AIS) score of one or more. The mean age was 25.9 ± 6.4 years and the mean gestational age was 26.2 ± 8.2 weeks. Additionally, 568 pregnant women had mild injuries and 168 had moderate to severe injuries. Logistic regression analysis revealed that seatbelt use (odds ratio (OR), 0.30), airbag deployment (OR, 2.00), and changes in velocity (21–40 km/h: OR, 3.03; 41–60 km/h: OR, 13.47; ≥61 km/h: OR, 44.56) were identified as independent predictors of having a moderate to severe injury. The positive and negative outcome groups included 231 and 12 pregnant women, respectively. Injury severity in pregnant women was identified as an independent predictor of a negative outcome (OR, 2.79). Avoiding moderate to severe maternal injuries is a high priority for saving the fetus, and education on appropriate seatbelt use and limiting vehicle speed for pregnant women is required.

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Aging is only significant factor causing CPR-induced injuries and serious injuries

Moriguchi S., Hamanaka K., Nakamura M., Takaso M., Baba M., Hitosugi M.

Legal Medicine (Legal Medicine) 48 2021.02

ISSN 13446223

Background: Cardiopulmonary resuscitation (CPR) sometime cause severe injuries and can affect quality of life, lead to long-term disabilities or death of the patient. The aim of this study is to identify the risk factors causing CPR-induced injuries and those of serious injuries. Methods: This was a retrospective forensic autopsy study in a single institution. Among 885 forensic autopsies undertaken between 2011 and 2018, those in which the victim had undergone CPR immediately after cardiac arrest were recorded. ‘Serious injuries’ were defined as an Abbreviated Injury Scale (AIS) score ≥ 3. CPR-induced injuries were evaluated by three experienced forensic pathologists. With the background and history of the patient, the circumstances of cardiac arrest and risks of causing CPR-induced injuries were determined by multivariate analyses. Results: Seventy-five victims comprised the study cohort. CPR-induced injuries were found in 52 victims (69.3%). Rib fracture was the most common (60.0%), followed by sternal fracture (37.3%), heart injury (21.3%) and liver injury (8.0%). Multivariate analysis revealed higher age to be an independent factor causing CPR-induced injuries (odds ratio [OR], 1.07, P < 0.001). Thirty-six victims had 39 serious injuries in the chest or abdomen: fracture of ≥ 3 ribs (35 cases), aortic dissection (two), lung contusion (one) and rupture of the heart (one). Multivariate analysis revealed higher age to be an independent factor causing CPR-induced serious injuries (OR, 1.09; P < 0.001). Conclusion: Aging was the significant factor causing CPR-induced injuries and serious injuries.

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糖尿病による低血糖に起因した自動車事故についての刑事責任

馬塲美年子

日本医事新報 5047 28 - 34 2021.01

Research paper (scientific journal), Single Work, Accepted

Factors influencing vehicle passenger fatality have changed over 10 years: a nationwide hospital-based study

Ishii W., Hitosugi M., Takeda A., Baba M., Iizuka R.

Scientific Reports (Scientific Reports) 10 ( 1 ) 2020.12

© 2020, The Author(s). Traffic injury trends have changed with safety developments. To establish effective preventive measures against traffic fatalities, the factors influencing fatalities must be understood. The present study evaluated data from a national medical database to determine the changes in these factors over time, as this has not been previously investigated. This observational study retrospectively analysed data from the Japanese Trauma Data Bank. Vehicle passengers involved in collisions from 2004–2008 and 2016–2017 were included. Data were compared between the two study periods, and between fatal and non-fatal patients within each period. Multivariate logistic regression analyses were performed to determine the factors influencing fatalities. In 2016–2017, patients were older and had lower fatality rates. In 2004–2008, fatalities were more likely to involve older male front-seat passengers with low d-BP, BT, and GCS values, and high AIS of the neck and abdomen. However, in 2016–2017, fatalities were more likely to involve older males with low GCS, high AIS of the abdomen, and positive focused assessment with sonography for trauma results. Our study identified independent factors influencing vehicle passenger fatalities, which will likely continue to evolve with the aging of the population and changing manners of injury.

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Factors associated with poor outcomes in patients with mild or moderate acute subdural hematomas

Hiraizumi S., Shiomi N., Echigo T., Oka H., Hino A., Baba M., Hitosugi M.

Neurologia Medico-Chirurgica (Neurologia Medico-Chirurgica) 60 ( 8 ) 402 - 410 2020

ISSN 04708105

The factors influencing the outcomes of mild/moderate acute subdural hematoma (ASDH) are still unclear. Retrospective analyses were performed to identify such factors. The medical records of all patients who were admitted to Saiseikai Shiga Hospital with mild (Glasgow Coma Scale [GCS] score of 14–15) or moderate (GCS score of 9–13) ASDH between April 2008 and March 2017 were reviewed. Comparisons between the patients who exhibited favorable and poor outcomes were performed. Then, independent factors that contributed to poor outcomes were identified via logistic regression analyses. A total of 266 patients with a mean age of 70.2 were included in this study. The most common concomitant injuries were subarachnoid hemorrhages (SAHs; 56.8%). The patients’ Injury Severity Scores (ISS) ranged from 16 to 75 (median: 21). The 66 moderate ASDH patients exhibited significantly higher frequencies of surgery and mortality (24.2% and 13.6%, respectively) than the 200 mild ASDH patients (8.0% and 4.5%, respectively). The factors associated with poor outcomes were age (odds ratio [OR]: 1.06) and the ISS (OR: 1.24) in the mild ASDH patients, and older age (OR: 1.09) and the higher ISS (OR: 1.15) in the moderate group, too.

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いわゆるcommon disease/symptomnに起因した自動車事故の法的責任と予防対策について

馬塲美年子, 一杉正仁

日本交通科学学会誌 20 ( 1 ) 42 - 49 2020

Research paper (scientific journal), Single Work, Accepted

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