Tomohisa Nagata

Dr. Tomohisa Nagata

orcid

Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 May 2018 in Journal of Occupational and Environmental Medicine
Verified
Journal Article
Open access
TNTomohisa Nagata
Tomohisa Nagata
KMKoji Mori
Koji Mori
MOMakoto Ohtani
Makoto Ohtani
MNMasako Nagata
Masako Nagata
SKShigeyuki Kajiki
Shigeyuki Kajiki
RLRonald Loeppke
Ronald Loeppke
Objective: This study aimed to examine a detailed breakdown of costs (absenteeism, presenteeism, and medical/pharmaceutical expenses), of the employees in four pharmaceutical companies in Japan. Methods: This is a cross-sectional study. Absenteeism and presenteeism were measured by a self-administered questionnaire for workers, and their costs were estimated using the human capital approach. Presenteeism was evaluated by the degree affected quality and quantity of work. Medical and pharmaceutical expenses were obtained by insurance claims. Results: The monetary value due to absenteeism was $520 per person per year (11%), that of presenteeism was $3055 (64%), and medical/pharmaceutical expenses were $1165 (25%). Two of the highest total cost burdens from chronic illness were related to mental (behavioral) health conditions and musculoskeletal disorders. Conclusion: A total cost approach can help employers set priorities for occupational health, safety, and population health management initiatives.

8 October 2021 in PLOS ONE
Verified
Journal Article
Open access
PDF file
QNQian Niu
Qian Niu
TNTomohisa Nagata
Tomohisa Nagata
NFNaoto Fukutani
Naoto Fukutani
MTMasato Tezuka
Masato Tezuka
KSKanako Shimoura
Kanako Shimoura
TATomoki Aoyama
Tomoki Aoyama
Background: Telework has been widely discussed in several fields; however, there is a lack of research on the health aspects of teleworking. The current study was conducted to determine the health effects of teleworking during an emergency statement as evidence for future policy development. Method: This was a cross-sectional study in which we administered an online questionnaire to 5,214 general workers (response rate = 36.4%) from June 2020 to August 2020. Based on working methods during the pandemic, workers were categorized into the office group (n = 86) and telework group (n = 1597), and we characterized their demographics, changes in lifestyle, telework status, physical symptoms, and mental health. Results: The results showed that the workers’ residence, marital status, management positions, and employee status affected the choice of the work method. During the emergency, teleworkers experienced more changes in their habits than office workers. In terms of exercise habits, 67.0% of the individuals belonging to the office-telework (OT) group exercised less. Approximately half of the teleworkers were satisfied with their telework, and those in the OT group were less satisfied with their telework than those in the telework-telework (TT) group, and they reported an increase in both working hours and meeting hours. Work-family conflict was more pronounced in the TT group than in the two other groups. Only 13.2% of individuals did not experience any stress in the past 30 days, and all three groups showed varying degrees of anxiety and depressive tendencies. In addition, all teleworkers experienced adverse physical symptoms before and after the emergency. Conclusion: Health issues associated with teleworking should be given adequate attention.

2 August 2021 in Journal of Occupational and Environmental Medicine
Verified
Journal Article
Open access
TNTomohisa Nagata
Tomohisa Nagata
MNMasako Nagata
Masako Nagata
KIKazunori Ikegami
Kazunori Ikegami
AHAyako Hino
Ayako Hino
STSeiichiro Tateishi
Seiichiro Tateishi
KMKoji MD Mori
Koji MD Mori
Objective: The present study examined the relationship between the intensity of home-based telework and work engagement. Methods: This cross-sectional study using a self-administrated questionnaire survey was conducted from December 22 to 25, 2020, in Japan. The subjects were asked single-item questions about the intensity of telework and three-item questions about work engagement using the Utrecht Work Engagement Scale. Coefficients were estimated using a multilevel regression model nested by the prefecture of residence and adjusted for covariates. Results: High-intensity (4 or more days per week) telework was not associated with high work engagement for men or women. In contrast, low and moderate intensity (3 days per week to once per month) were associated with high work engagement. The results were consistent when stratified by sex. Conclusions: Reasonable-intensity telework may have beneficial effects on work engagement.

17 January 2020 in Journal of Occupational Health
Verified
Journal Article
Open access
PDF file
Akihito ShimazuAkihito Shimazu
Akihito Shimazu
ANAkinori Nakata
Akinori Nakata
TNTomohisa Nagata
Tomohisa Nagata
Yutaka ArakawaYutaka Arakawa
Yutaka Arakawa
SKSachiko Kuroda
Sachiko Kuroda
IYIsamu Yamamoto
Isamu Yamamoto
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10 January 2021 in Journal of Occupational Health
Verified
Journal Article
Open access
PDF file
TNTomohisa Nagata
Tomohisa Nagata
DIDaisuke Ito
Daisuke Ito
MNMasako Nagata
Masako Nagata
AFAyumi Fujimoto
Ayumi Fujimoto
RIRyotaro Ito
Ryotaro Ito
KMKoji Mori
Koji Mori
Objectives: The health effects of telework, which was introduced extensively in the immediate context of the COVID-19 pandemic crisis in Japan, on teleworkers, their families, and non-teleworkers, are unknown. Accordingly, we developed a rapid health impact assessment (HIA) to evaluate positive and negative health effects of telework on these groups and recommended easily implementable countermeasures. Methods: Immediately after an emergency was declared in Japan, we implemented a rapid, five-step HIA. We screened and categorized health effects of telework for the three above-mentioned groups, extracting their content, directionality, and likelihood. Following a scoping exercise to determine the HIA’s overall implementation, five experienced occupational health physicians appraised and prioritized the screened items and added new items. We outlined specific countermeasures and disseminated the results on our website. A short-term evaluation was conducted by three external occupational health physicians and three nurses. Results: Following screening and appraisal, 59, 29, and 27 items were listed for teleworkers, non-teleworkers, and family members of teleworkers, respectively, covering work, lifestyle, disease and medical care, and home and community. Targeted countermeasures focused on the work environment, business management, communications, and lifestyles for teleworkers; safety and medical guidelines, work prioritization, and regular communication for non-teleworkers; and shared responsibilities within families and communication outside families for family members of teleworkers. Conclusion: The HIA’s validity and the countermeasures’ practical applicability were confirmed by the external evaluators. They can be easily applied and adapted across diverse industries to mitigate the wider negative effects of telework and enhance its positive effects.

TMTakahiro Mori
Takahiro Mori
TNTomohisa Nagata
Tomohisa Nagata
MNMasako Nagata
Masako Nagata
KOKiminori Odagami
Kiminori Odagami
KMKoji Mori
Koji Mori
We investigated the relationship between perceived supervisor support for health (PSSH) and presenteeism by adjusting for psychological distress and employee work engagement. These are the mediators of the two paths shown in the job demands-resources model. A cross-sectional study was conducted using a questionnaire survey among 15,158 non-managerial employees from seven companies in Japan considered to have relatively high perceived organizational support for health (POSH). PSSH was evaluated with a single question, “My supervisor supports employees to work vigorously and live a healthy life”, on a four-point scale. Presenteeism was estimated using the quantity and quality method. Multilevel logistic regression analyses nested by company were conducted. Lower PSSH was more likely to be associated with presenteeism, but after adjusting for psychological distress evaluated by K6 and for work engagement, the relationship between PSSH and presenteeism weakened. Our results suggested that lower PSSH is linked to presenteeism through both psychological states because of its role as a resource, and other independent factors, even with relatively high POSH. Increased PSSH could act as a measure against presenteeism in the workplace. To achieve this, it is important to create an environment where supervisors can easily encourage employees to improve their health.