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Nagasawa N.,Waseda University | Yamaguchi R.,Waseda University | Kato R.,JA Kyosai Research Institute | Shin-ichi T.,Waseda University
Journal of Environmental Engineering (Japan)

The purpose of this paper is to clarify the casual relationship for from longitudinal research with health and living environment. Based on a questionnaire longitudinal survey administered online to Japanese women 3054 in 2011 and 2013, about 1500 people with a history of low back pain, covariance structure analysis was conducted to explore the relationship between satisfaction of living environment, stress-related health and chronic low back pain. The models showed that there was a causal effect from "stress and fatigue" to "chronic back pain", while a second causal effect was shown from "satisfaction of living environment" to "stress and fatigue."Taken together, this suggests that "satisfaction of living environment" influences levels of "stress and fatigue" which in turns manifests itself as "chronic low back pain". Source

Yamaguchi R.,Waseda University | Nagasawa N.,Waseda University | Kato R.,JA Kyosai Research Institute | Tsutsumi H.,Showa Womens University | And 3 more authors.
Indoor Air 2014 - 13th International Conference on Indoor Air Quality and Climate

With an aging population and changes in social structure, health promotion has become an important factor in the daily lives of Japanese people. Based on the World Health Organization's definition of "health," there are two elements to improving an individual's health: eliminating physical factors in the living environment that are damaging to health and providing a satisfactory living environment. The objective of this study is to reveal the importance of considering non-energy benefits within the living environment. Based on a questionnaire survey administered online to 1,000 women in January 2012, cross-tabulation and covariance structure analysis was conducted on the relationship between living environments' physical/psychological factors and stress-related health. Structure analysis revealed that the two factors of living environment-physical and psychological-affected residents' health differently, revealing that consideration of non-energy benefits is important when creating health-promoting facilities. Source

Oka H.,Tokyo Medical University | Matsudaira K.,Tokyo Medical University | Fujii T.,Japan Labour | Okazaki H.,Japan Labour | And 4 more authors.

Objectives: Whiplash-associated disorders (WAD) are the most common injuries that are associated with car collisions in Japan and many Western countries. However, there is no clear evidence regarding the potential risk factors for poor recovery from WAD. Therefore, we used an online survey of the Japanese population to examine the association between potential risk factors and the persistence of symptoms in individuals with WAD. Materials and Methods: An online survey was completed by 127,956 participants, including 4,164 participants who had been involved in a traffic collision. A random sample of the collision participants (n = 1,698) were provided with a secondary questionnaire. From among the 974 (57.4%) respondents to the secondary questionnaire, we selected 183 cases (intractable neck pain that was treated over a period of 6 months) and 333 controls (minor neck pain that was treated within 3 months). Multivariable logistic regression analysis was used to evaluate the potential risk factors for prolonged treatment of WAD. Results: Female sex, the severity of the collision, poor expectations of recovery, victim mentality, dizziness, numbness or pain in the arms, and lower back pain were associated with a poor recovery from WAD. Conclusions: In the present study, the baseline symptoms (dizziness, numbness or pain in the arms, and lower back pain) had the strongest associations with prolonged treatment for WAD, although the psychological and behavioral factors were also important. These risk factors should be considered when evaluating patients who may have the potential for poor outcomes. © 2015 Oka et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Source

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