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Impact of COVID-19 Infection on Work Functioning in Japanese Workers: A Prospective Cohort Study
Okawara Makoto,Hirashima Keiki,Igarashi Yu,Mafune Kosuke,Muramatsu Keiji,Nagata Tomohisa,Tsuji Mayumi,Ogami Akira,Fujino Yoshihisa,Ogami Akira,Hino Ayako,Ando Hajime,Eguchi Hisashi,Muramatsu Keiji,Mor 한국산업안전보건공단 산업안전보건연구원 2023 Safety and health at work Vol.14 No.4
Background: The impact of COVID-19 infection on workers’ work function persists even after the acute phase of the infection. We studied this phenomenon in Japanese workers. Methods: We conducted a one-year prospective cohort study online, starting with a baseline survey in December 2020. We tracked workers without baseline work functioning impairment and incorporated data from 14,421 eligible individuals into the analysis. We estimated the incidence rate ratio for new onset of work functioning impairment due to COVID-19 infection during follow-up, using mixed-effects Poisson regression analysis with robust variance. Results: Participants reporting infection between January and December 2021 showed a significantly higher incidence of new work functioning impairment (adjusted incidence rate ratio: 2.18, 95% confidence interval: 1.75e2.71, p < 0.001). The formality of the recuperation environment correlated with a higher risk of work functioning deterioration in infected individuals (p for trend <0.001). Conclusion: COVID-19-infected workers may continue to experience work difficulties due to persistent, post-acute infection symptoms. Companies and society must urgently provide rehabilitation and social support for people with persistent symptoms, recognizing that COVID-19 is not just a transient acute infection.
Gene Expression Profiling for Toxicological Assessment of Manufactured Nanoparticles in Rat Lung
Katsuhide Fujita,Yasuo Morimoto,Akira Ogami,Toshihiko Myojyo,Isamu Tanaka,Manabu Shimada,Wei-Ning Wang,Shigehisa Endoh,Kunio Uchida,Hiroaki Tao,Masaharu Inada,Tetsuya Nakazato,Moritaka Tamura,Kazuhiro 환경독성보건학회 2008 한국독성학회 심포지움 및 학술발표회 Vol.- No.-
A 4-Year Follow-up Cohort Study of the Respiratory Functions in Toner-handling Workers
Nobuaki Yanagi,Hiroko Kitamura,Mitsuhito Mizuno,Koichi Hata,Tetsuro Uchiyama,Hiroaki Kuga,Tetsuhiro Matsushita,Shizuka Kurosaki,Masamichi Uehara,,Akira Ogami,Toshiaki Higashi 한국산업안전보건공단 산업안전보건연구원 2014 Safety and health at work Vol.5 No.4
Background: Focusing on the respiratory function for health effect indices, we conducted a crosssectionalstudy on workers who did and did not handle toner to compare the longitudinal changes. Methods: Among 116 individuals who worked for a Japanese business equipment manufacturer andparticipated in the study, the analysis included 69 male workers who we were able to follow up for 4years. We categorized the 40 workers engaged in toner-handling work as the exposed group and the 29workers not engaged in these tasks as the referent group, and compared their respiratory function testresults: peak expiratory flow rate (PEFR), vital capacity (VC), predicted vital capacity (%VC), forcedexpiratory volume in 1 second (FEV1), and forced expiratory volume in 1 second as a percent of forcedvital capacity (FEV1%). Results: The cross-sectional study of the respiratory function test results at the baseline and at the 5thyear showed no statistically significant differences in PEFR, VC, %VC, FEV1, and FEV1% between theexposed and referent workers. Also, respiratory function time-course for 4 years was calculated andcompared between the groups. No statistically significant differences were shown. Conclusion: Our study does not suggest any toner exposure effects on respiratory function. However, thenumber of subjects was small in our study; studies of larger populations will be desired in the future
A 4-Year Follow-up Cohort Study of the Respiratory Functions in Toner-handling Workers
Yanagi, Nobuaki,Kitamura, Hiroko,Mizuno, Mitsuhito,Hata, Koichi,Uchiyama, Tetsuro,Kuga, Hiroaki,Matsushita, Tetsuhiro,Kurosaki, Shizuka,Uehara, Masamichi,Ogami, Akira,Higashi, Toshiaki Occupational Safety and Health Research Institute 2014 Safety and health at work Vol.5 No.4
Background: Focusing on the respiratory function for health effect indices, we conducted a cross-sectional study on workers who did and did not handle toner to compare the longitudinal changes. Methods: Among 116 individuals who worked for a Japanese business equipment manufacturer and participated in the study, the analysis included 69 male workers who we were able to follow up for 4 years. We categorized the 40 workers engaged in toner-handling work as the exposed group and the 29 workers not engaged in these tasks as the referent group, and compared their respiratory function test results: peak expiratory flow rate (PEFR), vital capacity (VC), predicted vital capacity (%VC), forced expiratory volume in 1 second ($FEV_1$), and forced expiratory volume in 1 second as a percent of forced vital capacity ($FEV_1%$). Results: The cross-sectional study of the respiratory function test results at the baseline and at the $5^{th}$ year showed no statistically significant differences in PEFR, VC, %VC, $FEV_1$, and $FEV_1%$ between the exposed and referent workers. Also, respiratory function time-course for 4 years was calculated and compared between the groups. No statistically significant differences were shown. Conclusion: Our study does not suggest any toner exposure effects on respiratory function. However, the number of subjects was small in our study; studies of larger populations will be desired in the future.