研究者詳細 - 伊香賀　俊治

論文 - 伊香賀　俊治

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Hierarchical structure analysis for risk factors of needing long-term care in the living environment as mediated by social capital

Miyazaki E., Ando S., Ikaga T.

Journal of Environmental Engineering (Japan) （Journal of Environmental Engineering (Japan)） 86 （ 782 ） 399 - 408 2021年

研究論文（学術雑誌）, 査読有り, ISSN 13480685

In Japan, healthcare and nursing care expenses for the elderly are increasing year by year, and extending healthy life expectancy is therefore desirable. Social capital (SC) is a measure of the degree of social interaction and has been gaining attention as a health-related Previous studies have shown that few people have poor subjective health in areas with good SC scores. Thus, a living environment that fosters SC might facilitate the improvement and maintenance of health status. The purpose of this study was to clarify the effects of living environment, such as facilities and community outreach efforts, on nursing care risk as mediated by SC. A questionnaire survey was carried out for 3 weeks from September to October 2018.Participants were adults in three elementary school districts in Niihama City, Ehime Prefecture, Japan Survey contents included SC, neighborhood environment, residential environment, and health status. A total of 7,220 questionnaires were distributed, and 2,693 were correctly completed (valid response rate = 37.3%). The number of samples used for analysis was 2,053. Of respondents over 65 years of age, 26.8% were at high risk of needing long-term care. Mann-Whitney U test was performed to verify the impact of SC on risk of needing long-term care. Logistic regression analysis was performed using participant attributes such as sex and household composition as moderator effects. The aim was to clarify the effects of living environment such as facilities and community outreach on the risk of needing long-term care via SC. The analysis model considered factors including age, sex, educational attainment, and length of residence in the area. The odds ratio (OR) of requiring long-term care for low SC compared with high SC was 1.91 (p <0.01). Next, I examined the relationship between SC and the living environment based on the "Facilities" and "Activity participation," or "Communication" items of living environment. The OR of SC for neighborhood environment factors ranged from 1.3 to 2.4 (p <0.05), and the OR of SC for housing environment factors ranged from 1.3 to 3.0 (p <0.05). Finally, path analysis was performed. An index for the housing and neighborhood environments was determined as the total score of the items that showed the relationships between SC and the housing and neighborhood environments, as analyzed previously. The determination coefficient for the risk of needing long-term care was 0.19. In summary, the facilities of the living environment affected SC directly or via the community items and finally affected the risk of needing long-term care. A study limitation is that the results were based solely on data that covered one target area. In the future, we plan to conduct questionnaire surveys in other regions using statistical data and to analyze responses considering regional characteristics.

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Intervention study of the effect of insulation retrofitting on home blood pressure in winter: a nationwide Smart Wellness Housing survey

Umishio W., Ikaga T., Kario K., Fujino Y., Hoshi T., Ando S., Suzuki M., Yoshimura T., Yoshino H., Murakami S.

Journal of hypertension （Journal of hypertension） 38 （ 12 ） 2510 - 2518 2020年12月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 0263-6352

OBJECTIVE: The WHO's Housing and health guidelines (2018) listed 'low indoor temperatures and insulation' as one of five priority areas, and indicated insulation retrofitting to help mitigate the effect of low indoor temperatures on health. However, there is still not enough evidence for the effect of insulation retrofitting based on an objective index. METHODS: We conducted a nonrandomized controlled trial comparing home blood pressure (HBP) between insulation retrofitting (942 households and 1578 participants) and noninsulation retrofitting groups (67 households and 107 participants). HBP and indoor temperature were measured for 2 weeks before and after the intervention in winter. To examine the influence of insulation retrofitting on HBP, we used multiple linear regression analysis. RESULTS: The analyses showed that indoor temperature in the morning rose by 1.4°C after insulation retrofitting, despite a slight decrease in outdoor temperature by 0.2°C. Insulation retrofitting significantly reduced morning home SBP (HSBP) by 3.1 mmHg [95% confidence interval (95% CI): 1.5-4.6], morning home DBP (HDBP) by 2.1 mmHg (95% CI: 1.1-3.2), evening HSBP by 1.8 mmHg (95% CI: 0.2-3.4) and evening HDBP by 1.5 mmHg (95% CI: 0.4-2.6). In addition, there was a dose-response relationship between indoor temperature and HBP, indicating the effectiveness of a significant improvement in the indoor thermal environment. Furthermore, there was heterogeneity in the effect of insulation retrofitting on morning HSBP in hypertensive patients compared with normotensive occupants (-7.7 versus -2.2 mmHg, P for interaction = 0.043). CONCLUSION: Insulation retrofitting significantly reduced HBP and was more beneficial for reducing the morning HSBP of hypertensive patients.

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Disparities of indoor temperature in winter: A cross-sectional analysis of the Nationwide Smart Wellness Housing Survey in Japan

Umishio W., Ikaga T., Fujino Y., Ando S., Kubo T., Nakajima Y., Hoshi T., Suzuki M., Kario K., Yoshimura T., Yoshino H., Murakami S.

Indoor Air （Indoor Air） 30 （ 6 ） 1317 - 1328 2020年11月

研究論文（学術雑誌）, 共著, 査読有り, ISSN 09056947

© 2020 The Authors. Indoor Air published by John Wiley & Sons Ltd The WHO Housing and health guidelines recommend a minimum indoor temperature of 18°C to prevent cold-related diseases. In Japan, indoor temperatures appear lower than in Euro-American countries because of low insulation standards and use of partial intermittent heating. This study investigated the actual status of indoor temperatures in Japan and the common characteristics of residents who live in cold homes. We conducted a nationwide real-world survey on indoor temperature for 2 weeks in winter. Cross-sectional analyses involving 2190 houses showed that average living room, changing room, and bedroom temperatures were 16.8°C, 13.0°C, and 12.8°C, respectively. Comparison of average living room temperature between prefectures revealed a maximum difference of 6.7°C (Hokkaido: 19.8°C, Kagawa: 13.1°C). Compared to the high-income group, the odds ratio for living room temperature falling below 18°C was 1.38 (95% CI: 1.04-1.84) and 2.07 (95% CI: 1.28-3.33) for the middle- and low-income groups. The odds ratio was 1.96 (95% CI: 1.19-3.22) for single-person households, compared to households living with housemates. Furthermore, lower room temperature was correlated with local heating device use and a larger amount of clothes. These results will be useful in the development of prevention strategies for residents who live in cold homes.

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Impact of Cold Indoor Temperatures on Overactive Bladder: A Nationwide Epidemiological Study in Japan

Ishimaru T., Ando S., Umishio W., Kubo T., Murakami S., Fujino Y., Ikaga T.

Urology （Urology） 145 60 - 65 2020年11月

研究論文（学術雑誌）, 共著, ISSN 00904295

© 2020 Elsevier Inc. OBJECTIVE: To assess the relationship between overactive bladder (OAB) and indoor temperatures in the living room and bedroom. METHODS: Questionnaire data and indoor temperature measurements were obtained from a baseline survey collected during the winter months from November 2014 to March 2019. We performed multiple logistic regression to assess the relationships between OAB and indoor temperatures in the living room and bedroom. RESULTS: The prevalence of overactive bladder was 16.4% among 4782 participants living in 2453 dwellings. The odds of having OAB were higher for participants whose average living room temperature at bedtime was lower than 12°C than for those whose average bedtime living room temperature was at least 18°C (adjusted odds ratio = 1.44, 95% confidence interval: 1.03-2.00). No association was observed between bedroom temperature and OAB. CONCLUSION: These results suggest that thermal comfort in the living room—but not in the bedroom—may improve OAB symptoms. Additionally, using sufficient bedding may prevent cold bedrooms from having a negative impact in terms of OAB. Future studies should focus on housing interventions and education regarding lifestyle modification in patients with OAB.

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Eco-efficiency assessment by industry for japanese municipalities nationwide based on gross regional product and environmental damage

Yamasaki J., Ikaga T., Itsubo N.

Journal of Environmental Engineering (Japan) （Journal of Environmental Engineering (Japan)） 85 （ 776 ） 745 - 755 2020年10月

研究論文（学術雑誌）, 共著, ISSN 13480685

© 2020 Architectural Institute of Japan. All rights reserved. In this study, eco-efficiency assessment by industry was conducted uniformly for all Japanese municipalities based on indicators of both economic value and environmental load. For these, the respective indicators were gross regional product and amount of environmental damage calculated by the endpoint-type life cycle impact assessment method “LIME2.” Based on reliable, verifiable, and comparable statistical information, eco-efficiency was calculated to be 69.8 for all industries throughout Japan in 2015. The assessment results of all municipalities were placed on a map to visualize the regionality of eco-efficiency, which revealed industry trends nationwide.

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Comprehensive fungal community analysis of house dust using next-generation sequencing

Izawa K., Kubosaki A., Kobayashi N., Akiyama Y., Yamazaki A., Hashimoto K., Konuma R., Kamata Y., Hara-Kudo Y., Hasegawa K., Ikaga T., Watanabe M.

International Journal of Environmental Research and Public Health （International Journal of Environmental Research and Public Health） 17 （ 16 ） 1 - 11 2020年08月

研究論文（学術雑誌）, 共著, ISSN 16617827

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. Fungal community analyses in homes have been attracting attention because fungi are now generally considered to be allergens. Currently, these analyses are generally conducted using the culture method, although fungal communities in households often contain species that are difficult to culture. In contrast, next-generation sequencing (NGS) represents a comprehensive, labor-and time-saving approach that can facilitate species identification. However, the reliability of the NGS method has not been compared to that of the culture method. In this study, in an attempt to demonstrate the reliability of this application, we used the NGS method to target the internal transcribed spacer 1 (ITS1) in the fungal genome, conducted fungal community analyses for 18 house-dust samples and analyzed fungal community structures. The NGS method positively correlated with the culture method regarding the relative abundance of Aspergillus, Penicillium, Cladosporium and yeasts, which represent the major fungal components found in houses. Furthermore, several genera, such as Malassezia, could be sensitively detected. Our results imply that the reliability of the NGS method is comparable to that of the culture method and indicates that easily available databases may require modifications, including the removal of registrations that have not been sufficiently classified at the genus level.

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Development of an environmentally friendly PV/T solar panel

Terashima K., Sato H., Ikaga T.

Solar Energy （Solar Energy） 199 510 - 520 2020年03月

研究論文（学術雑誌）, 共著, ISSN 0038092X

© 2020 The Authors A possibility of developing an environmental-friendly photovoltaic/thermal (PV/T) solar panel, which can shut high temperature radiation within a panel box, was experimentally confirmed. The panel has a decompression-boiling heat collector, which can absorb heat from the PV module and can keep the air and the cover glass inside the panel box at lower temperature by using lower boiling temperature of working fluid under vacuum condition. The panel also has an emboss-processed cover glass, which can totally reflect the high temperature heat radiation from the PV module within the panel box. The experimental results using a single PV/T system showed that it could keep the heat radiation temperature from the PV/T solar panel surface around 45 °C even in summer; it provided the hot water at least 60 °C by controlling the flow-rate; and it produced 71.3% of solar energy in total as electricity and 40 °C heat, in summer, Yokohama, Japan. Highly efficient utilization of solar energy with small environmental heat-load would be possible by using the proposed PV/T system.

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Development of work environment subjective assessment tool for improvement of workers' work efficiency and health promotion

Abe Y., Shiraishi Y., Hayashi T., Ikaga T., Ando S.

AIJ Journal of Technology and Design （AIJ Journal of Technology and Design） 26 （ 62 ） 191 - 196 2020年02月

研究論文（学術雑誌）, 共著, ISSN 13419463

© 2020 Architectural Institute of Japan. All rights reserved. In recent years, not only the residence but also the effort of health promotion by improving the social environment including the working and the regional environment has attracted attention. This paper introduces a subjective assessment tool of the work environment, referred to as "CASBEE- Office Health Checklist". This tool is an assessment tool for workers themselves to evaluate satisfaction for office environment where workers spend a lot of time. By using this tool, people are aware of factors that affect health and intellectual productivity, and it is expected that they can conduct health management strategically, which leads to environmental improvement.

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Annual Nationwide Environmental Impact Assessment of Japanese Municipalities by Type of Business within the Endpoint-type LCIA Method "lIME2"

Yamasaki J., Ikaga T., Itsubo N.

IOP Conference Series: Earth and Environmental Science （IOP Conference Series: Earth and Environmental Science） 410 （ 1 ） 012067 - 012067 2020年01月

研究論文（学術雑誌）, 共著, ISSN 17551307

© 2020 Published under licence by IOP Publishing Ltd. This study attempts a comprehensive environmental impact assessment, within the context of annual operations by type of business in each division of Japanese municipality, based on the LCIA (Life Cycle Impact Assessment) method. LIME2 (Life-Cycle Impact Assessment Method Based on Endpoint Modeling 2) is an example of an endpoint-type LCIA method developed in Japan. Annual environmental impacts of municipalities nationwide are assessed by LIME2 from the perspective of environmental damage, indexed to the Japanese yen. Here, this index is referred to as the "Eco-index Yen". The availability of necessary inventory data in each category is surveyed from statistical information published by governments. From the assessment results based on these conditions, the annual damage amount of all Japanese municipalities taken together is 4.63 trillion yen. The assessment result of each municipality is converted into indicators per capita and per GRP (Gross Regional Product). These results are displayed on a map of Japan to visualize regional characteristics nationwide by type of business, across different types of industries, including the residential and transportation sectors. As described in this study, these results provide a first step toward constructing a new methodology for comprehensive environmental impact assessment of administrative units.

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Annual environmental impact assessment of administrative divisions in 42 countries within the framework of global-scale LCIA method “LIME3”

Yamasaki J., Ikaga T., Itsubo N.

Journal of Environmental Engineering (Japan) （Journal of Environmental Engineering (Japan)） 85 （ 767 ） 67 - 77 2020年

研究論文（学術雑誌）, 共著, 査読有り, ISSN 13480685

© 2020 Architectural Institute of Japan. All rights reserved. This study attempted to comprehensively measure annual environmental loads emitted in administrative divisions of 42 countries, most of which are OECD members, in the year 2015 using the LCIA method LIME3. Using statistical information that was reliable, verifiable, and comparable, the total environmental damage amount for the 42 countries was calculated to be 5.22 trillion USD. The top three amounts for each impact category were land use, water consumption, and forest resource consumption. These damage amounts were placed on a world map to visualize tendencies related to population distribution and industrial activity.

Perceived indoor temperature and change in nursing care level in community-dwelling elderly: A field survey on the effect of winter indoor thermal environment on care requirements: Part 3

Ono M., Ikaga T., Nakajima Y., Hoshi T.

Journal of Environmental Engineering (Japan) （Journal of Environmental Engineering (Japan)） 85 （ 769 ） 197 - 204 2020年

研究論文（学術雑誌）, 共著, ISSN 13480685

© 2020 Architectural Institute of Japan. All rights reserved. A cold indoor thermal environment in houses where older people live is one of the factors in their required nursing care level. Participants were 126 community-dwelling elderly using rehabilitation facilities in Japan. Participants were divided into a cold group and a warm group according to perceived indoor temperature. Multiple logistic regression analysis was conducted by using change in care level as an objective variable. Participants in the warm group had a lower probability of requiring a higher care level than those in the cold group (Odds Ratio = 2.84; p=0.02; 95% CI, 1.16-6.98).

A new proposal for environmental accounting of Japanese municipality with the framework of endpoint-type lcia method "lime2": Calculation of environmental conservation effects in yokohama city from 2000 to 2015

Yamasaki J., Ikaga T., Itsubo N.

Journal of Environmental Engineering (Japan) （Journal of Environmental Engineering (Japan)） 85 （ 769 ） 225 - 235 2020年

研究論文（学術雑誌）, 共著, ISSN 13480685

© 2020 Architectural Institute of Japan. All rights reserved. With a focus on Japanese municipalities, this study proposes a unified methodology based on the endpoint-type LCIA method LIME2 for calculating the effects of environmental conservation, which is one item used by administrative divisions in Japan for environmental accounting. The proposed methodology integrates the assessment theory of LIME2 with the basic tenets of the Environmental Accounting Guidelines 2005, and furthermore contributes unique ideas on interpreting the assessment results. When the methodology was applied to the city of Yokohama, the environmental conservation effect for the 15-year period from 2000 to 2015 was calculated in monetary terms as -1.07 billion yen.

Annual nationwide environmental impact assessment of Japanese municipalities within the framework of endpoint-type LCIA method “LIME2” (Part 2): Visualization of temporal changes

Yamasaki J., Ikaga T., Itsubo N.

Journal of Environmental Engineering (Japan) （Journal of Environmental Engineering (Japan)） 85 （ 77 ） 523 - 533 2020年

研究論文（学術雑誌）, 共著, ISSN 13480685

© 2020 Architectural Institute of Japan. All rights reserved. This study seeks to visualize the temporal changes in environmental damage in Japanese administrative divisions (municipalities) from 2000 to 2015 using the LCIA method LIME2. Using statistical information that was reliable, verifiable, and comparable, the total amount of environmental damage for the whole of Japan was calculated to be 8.40, 8.47, 7.50, and 7.41 trillion yen in 2000, 2005, 2010, and 2015, respectively. Spatial mapping of these temporal changes provides insights into the effects of local environmental policies and industrial activities across the country. It became possible to visualize the change over time in environmental loads based on social factors related to each period in Japan.

執務者の作業効率改善・健康増進に向けた執務環境主観評価ツールの有効性の検証

安部祐子, 白石靖幸, 林立也, 伊香賀俊治, 安藤真太朗, 藤野善久

空気調和・衛生工学会論文集（公益社団法人空気調和・衛生工学会） 45 （ 278 ） 27 - 35 2020年

研究論文（学術雑誌）, 共著, 査読有り, ISSN 0385-275X

<p>ワーカーにとってオフィスは多くの時間を過ごす場所である。そのため、オフィス環境やそこでの働き方は知的生産性だけなく、健康面へ影響を与える可能性を有している。しかし、現段階では具体的なオフィス環境改善策の方向性は示されているものの、オフィス環境の質を定量的に評価するツールはなく、ワーカーや企業のオーナーに対して現状の問題を視覚的に示し、改善を促す評価ツールの開発が必要不可欠である。そこで、本研究ではワーカーが知的生産性向上及び健康増進の視点から執務環境を主観的に評価するツールである CASBEE-オフィス健康チェックリストを開発した。また、本ツールで評価したワーカーの周辺環境の評価結果と実際の主観作業効率や健康状態を照合することにより、CASBEE-OHC のオフィスの健康影響を提示する執務環境評価ツールとしての有効性を検証した。 </p>

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執務者の作業効率改善・健康増進に向けた執務環境主観評価ツールの有効性の検証

安部祐子, 白石靖幸, 林立也, 伊香賀俊治, 安藤真太朗, 藤野善久

空気調和・衛生工学会論文集（公益社団法人空気調和・衛生工学会） 45 （ 278 ） 27 - 35 2020年

研究論文（学術雑誌）, 査読有り, ISSN 0385-275X

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Heatstroke management during the COVID-19 epidemic: recommendations from the experts in Japan

Yokobori Shoji, Kanda Jun, Okada Yohei, Okano Yuichi, Kaneko Hitoshi, Kobayashi Tatsuho, Kondo Yutaka, Shimazaki Junya, Takauji Shuhei, Hayashida Kei, Hifumi Toru, Fujita Motoki, Moriya Takashi, Yagi Masaharu, Yamaguchi Junko, Oda Yasutaka, Shiraishi Shinichiro, Wakasugi Masahiro, Shimizu Keiki, Miyake Yasufumi, Yokota Hiroyuki, Yaguchi Arino, Shimazu Takeshi, Asami Masahiro, Hamaguchi Jun, Ishihara Tadashi, Kawagishi Toshiomi, Igarashi Yutaka, Hirano Yohei, Nakae Ryuta, Arakawa Yuki, Miyamoto S

ACUTE MEDICINE & SURGERY （WILEY） 7 （ 1 ） 2020年

研究論文（学術雑誌）, 共著, 査読有り, ISSN 2052-8817

Fever and hyperthermia are the main symptoms of coronavirus disease (COVID-19) and heatstroke, and it is difficult to distinguish them. There is a need to discuss safe prevention and medical treatment for heatstroke. In view of the above issues, the Japanese Association for Acute Medicine "Committee on heatstroke and hypothermia" established a "Working group on heatstroke medical care given the COVID-19 epidemic" jointly with the Japanese Society for Emergency Medicine that focuses on emergency medical personnel, including paramedics and nurses, the Japanese Association for Infectious Diseases, an academic society of infectious disease, and the Japanese Respiratory Society, an academic organization on respiratory diseases. The precautions for prevention of heatstroke this summer during the coronavirus epidemic was summarized in "Proposals on heatstroke prevention based on the COVID-19 epidemic" as follows and was issued on 1 June, 2020. Based on the above, we have determined that guidance in clinical practice is necessary not only from the viewpoint of heatstroke prevention, but also medical treatment. As such, we have created this guidance in the form of supplementary recommendations.

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Cross-Sectional Analysis of the Relationship Between Home Blood Pressure and Indoor Temperature in Winter: A Nationwide Smart Wellness Housing Survey in Japan

Umishio W., Ikaga T., Kario K., Fujino Y., Hoshi T., Ando S., Suzuki M., Yoshimura T., Yoshino H., Murakami S.

Hypertension (Dallas, Tex. : 1979) （Hypertension (Dallas, Tex. : 1979)） 74 （ 4 ） 756 - 766 2019年10月

研究論文（学術雑誌）, 共著, ISSN 0194911X

Mortality due to cardiovascular disease rises sharply in winter. Known as excess winter mortality, this phenomenon is partially explained by cold exposure-induced high blood pressure. Home blood pressure, especially in the morning, is closely associated with cardiovascular disease risk. We conducted the first large nationwide survey on home blood pressure and indoor temperature in 3775 participants (2095 households) who intended to conduct insulation retrofitting and were recruited by construction companies. Home blood pressure was measured twice in the morning and evening for 2 weeks. The relationship between home blood pressure and indoor temperature in winter was analyzed using a multilevel model with 3 levels: repeatedly measured day-level variables (eg, indoor ambient temperature and quality of sleep), nested within individual-level (eg, age and sex), and nested within household level. Cross-sectional analyses involving about 2900 participants (1840 households) showed that systolic blood pressure in the morning had significantly higher sensitivity to changes in indoor temperature (8.2 mm Hg increase/10°C decrease) than that in the evening (6.5 mm Hg increase/10°C decrease) in participants aged 57 years (mean age in this survey). We also found a nonlinear relationship between morning systolic blood pressure and indoor temperature, suggesting that the effect of indoor temperature on blood pressure varied depending on room temperature range. Interaction terms between age/women and indoor temperature were significant, indicating that systolic blood pressure in older residents and women was vulnerable to indoor temperature change. We expect that these results will be useful in determining optimum home temperature recommendations for men and women of each age group. Clinical Trial Registration- URL: http://www.umin.ac.jp/ctr/index.htm. Unique identifier: UMIN000030601.

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Analysis of the Influence of Lung Function Decline on Brain Function using Brain Healthcare Quotient

Watanabe H., Fukunaga K., Ikaga T., Mitsukura Y.

IECON Proceedings (Industrial Electronics Conference) （IECON Proceedings (Industrial Electronics Conference)） 2019-October 5353 - 5357 2019年10月

研究論文（学術雑誌）, 共著, ISSN 9781728148786

© 2019 IEEE. In this paper, we used Brain Healthcare Quotient (BHQ) to analyze the influence of lung function on brain function. A large-scale survey was conducted for the purpose. In the measurement survey, magnetic resonance images were acquired, and BHQ was calculated and used as brain function. As lung function, we measured forced vital capacity (FVC) and calculated forced expiratory volume 1.0 sec (FEV1.0%). As a result of analysis, it became clear that the decrease in FEV1.0% affects GM BHQ and that the decrease in lung function also affects brain function by using BHQ.

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Eco-efficiency assessment of Japanese municipalities based on environmental impacts and gross regional product

Yamasaki J., Ikaga T., Itsubo N.

Sustainability (Switzerland) （Sustainability (Switzerland)） 11 （ 15 ） 4045 - 4045 2019年08月

研究論文（学術雑誌）, 共著, ISSN 20711050

© 2019 by the authors. Governments at different levels need to appreciate the environmental impacts of socioeconomic activities within their boundaries. They also need to decide relevant environmental policies after carefully examining future pathways based on the relationship between the environment and the economy. This study focuses on Japanese basic administrative divisions (i.e., municipalities) and attempts to quantify the annual environmental efficiency of processes and socioeconomic activities within each of these divisions using life-cycle impact assessment (LCIA) concepts. A key element of the LCIA is the integration of different environmental loads across various impact categories, such as global warming, air pollution, and land use, and their representation through a simple indicator. First, we conduct annual environmental impact assessments for all Japanese municipalities based on reliable, verifiable, and comparable statistical information. Next, we estimate the environmental efficiency of socioeconomic activities within each division by dividing the gross regional product (GRP) with the environmental damage amounts calculated through LIME2, an LCIA-based tool tailored for Japan. Assessment results for each municipality are visualized on maps of Japan in order to highlight the spatial distribution of the values for each indicator. The findings of this study can aid local, regional, and national governments in Japan to inform environmental policy design and decision-making at different spatial levels.

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Relationship between perceived indoor temperature and self-reported risk for frailty among community-dwelling older people

Nakajima Y., Schmidt S., Fänge A., Ono M., Ikaga T.

International Journal of Environmental Research and Public Health （International Journal of Environmental Research and Public Health） 16 （ 4 ） 613 - 613 2019年02月

研究論文（学術雑誌）, 共著, ISSN 16617827

© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This study investigated the relationship between perceived indoor temperature in winter and frailty among community-dwelling older people. This cross-sectional study included 342 people 65 years and older in Japan. Participants answered questions about demographics, frailty, housing, and perceived indoor temperature in winter. Participants were grouped based on perceived indoor temperature (Cold or Warm) and economic satisfaction (Unsatisfied or Satisfied). Differences in the frailty index between perceived indoor temperature groups and economic satisfaction groups were tested by using ANCOVA and MANCOVA. An interaction effect showed that people in the Cold Group and unsatisfied with their economic status had significantly higher frailty index scores (F(1, 336) = 5.95, p = 0.015). Furthermore, the frailty index subscale of fall risk was the specific indicator of frailty that accounted for this significant relationship. While previous research has shown the risks related to cold indoor temperature in homes, interestingly among those who reported cold homes, only those who were not satisfied with their economic situation reported being at increased risk for frailty. This highlights the potential importance of preventing fuel poverty to prevent frailty.

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