| Project/Area Number |
25461393
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Endocrinology
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| Research Institution | Nara Medical University |
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Principal Investigator |
Tone Nobuhiro 奈良県立医科大学, 医学部, その他 (50630498)
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| Co-Investigator(Kenkyū-buntansha) |
OBAYASHI Kenji 奈良県立医科大学, 医学部医学科, 助教 (30596656)
SAEKI Keigo 奈良県立医科大学, 医学部医学科, 講師 (60364056)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 照度 / 短波長 / 夜間 / サーカディアンリズム / 睡眠 / 血圧 / メラトニン / 生体リズム / 光曝露 / 短波長光 / うつ症状 / アイレベル光曝露量 / 照度測定 / 短波長光測定 |
|---|
| Outline of Final Research Achievements |
Background: Although studies have reported the effects of nighttime light exposure on biological rhythms, there are few studies measuring light exposure at eye-level. Method and Results: In this cross-sectional study of 580 elderly individuals, we measured nighttime light exposure over two consecutive nights, using both the ambulatory eye-level light meter and a bedroom light meter facing the ceiling. Multivariable analysis indicated that the fitness of statistical models of the associations of nighttime light with melatonin secretion, sleep quality, and blood pressure, using the eye-level light meter, was better than those using the bedroom light meter. Conclusions: We demonstrated the accuracy for ambulatory eye-level measurement of nighttime light exposure in home settings.
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