Positive Effect of Daylight Exposure on Nocturnal Urinary Melatonin Excretion in the Elderly: A Cross-Sectional Analysis of the HEIJO-KYO Study

Obayashi, Kenji; Saeki, Keigo; Iwamoto, Junko; Okamoto, Nobuhiko; Tomioka, Kimiko; Nezu, Satoko; Ikada, Yoshito; Kurumatani, Norio

doi:10.1210/jc.2012-1873

Cited by 106 publications

(73 citation statements)

References 39 publications

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“…Between September 2010 and April 2014, 1127 communitydwelling elderly subjects (age Ն 60 y) were voluntarily enrolled in the Housing Environments and Health Investigation among Japanese Older People in Nara, Kansai Region, a prospective community-based cohort study (HEIJO-KYO) (24). We excluded participants from this study who did not complete measurements of physiological melatonin levels and cognitive function or mood; 1105 participants remained.…”

Section: Participantsmentioning

confidence: 99%

Physiological Levels of Melatonin Relate to Cognitive Function and Depressive Symptoms: The HEIJO-KYO Cohort

Obayashi¹,

Saeki²,

Iwamoto

et al. 2015

The Journal of Clinical Endocrinology &Amp; Metabolism

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Section: Participantsmentioning

confidence: 99%

Physiological Levels of Melatonin Relate to Cognitive Function and Depressive Symptoms: The HEIJO-KYO Cohort

Obayashi¹,

Saeki²,

Iwamoto

et al. 2015

The Journal of Clinical Endocrinology &Amp; Metabolism

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“…Taking in daylight through windows gives a sense of spaciousness to the occupants [24]. Moreover, recent studies show that bathing in daylight normalizes our biorhythm and contributes to health, for example, by improving sleep disorder, depression, and cognitive function; for example, see [24,25]. On the other hand, the use of daylight leads to reducing energy for illumination.…”

Section: Spatial Elementsmentioning

confidence: 99%

Methodology of Applying Control Science to Sustainable Housing Design

Fujihira¹

2017

Sustainable Home Design by Applying Control Science

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The previous chapter has demonstrated the "basic control system for sustainability", "model of sustainability", and "two-step preparatory work for sustainable design". Based on these basic schemes, this chapter shows the methodology of applying control science to sustainable home design. First, using two factors, that is, "material" and "space", we identify important elements of home. Next, we provide the two-step preparatory work for sustainable home design, namely, (1) determining the relationships between the standard home and sustainability and (2) sustainability checkup on a home as an object. After that, we derive "sustainable design guidelines" from step 1 and "sustainability checklist" from step 2, respectively. Finally, we compose the "control system for promoting sustainable home design" in which the sustainable design guidelines and sustainability checklist are incorporated. This practical control system demonstrates sustainable design processes for both new and existing homes.

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“…This study was a part of the Housing Environments and Health Investigation among Japanese Older People in Nara, Kansai Region (HEIJO-KYO); a prospective communitybased cohort study (14). This cohort was assembled with the cooperation of local residents' associations and elderly residents' clubs between September and April in 2010, 2011, 2012, 2013, and 2014, and included 1127 communitydwelling elderly individuals ($60 years).…”

Section: Participants and Study Protocolmentioning

confidence: 99%

“…Potential sleep-disordered breathing (SDB) was defined as sleep efficiency (total sleep time/duration in bed) ,70% and/or total sleep time (the sleep time during the in-bed period) ,5 hours, because the odds ratio for SDB is significantly higher in the elderly population who met this sleep criteria (18). Melatonin secretion was estimated by nocturnal urinary 6-sulfatoxymelatonin excretion using a highly sensitive ELISA kit (RE54031; IBL International, Hamburg, Germany), as described in our previous study (14).…”

Section: Other Measurementsmentioning

confidence: 99%

Nighttime BP in Elderly Individuals with Prediabetes/Diabetes with and without CKD: The HEIJO-KYO Study

Obayashi

Saeki

Kurumatani

2016

CJASN

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Background and objectives Although previous studies suggested that nighttime BP is elevated in diabetes mellitus, the association between prediabetes and nighttime BP remains unclear. In addition, the relationship between diabetic status, renal function, and nighttime BP has not been evaluated in large populations.Design, setting, participants, & measurements In this cross-sectional study, we assessed diabetic status, renal function, and ambulatory BP parameters among 1081 community-dwelling elderly individuals (mean age, 71.867.0 years). Participants were classified into six categories based on diabetic status (normoglycemia, prediabetes, or diabetes mellitus) and renal function (normal function or CKD). BP was measured at 30-minute intervals for 48 hours using a validated ambulatory recorder.Results The mean nighttime systolic BP (SBP) was 115.7616.1 mmHg. The multivariable analysis, adjusted for age, sex, smoking status, and daytime SBP, revealed that, compared with participants with normoglycemia but without CKD (n=378), mean nighttime SBP was significantly higher in participants with both prediabetes and CKD (n=93) by 2.9 mmHg (95% confidence interval [95% CI], 0.2 to 5.6; P=0.03) and in patients with both diabetes mellitus and CKD (n=30) by 7.8 mmHg (95% CI, 3.5 to 12.2; P,0.001) but not in participants with both normoglycemia and CKD (n=75), participants with prediabetes without CKD (n=374), or patients with diabetes mellitus without CKD (n=131). Notably, the multivariable analysis indicated that the interaction terms of diabetic status and renal function were significantly associated with nighttime SBP (P=0.03).Conclusions Nighttime SBP was significantly higher in participants with prediabetes and CKD but not in participants with prediabetes without CKD, compared with participants with normoglycemia and without CKD. In addition, a significant interaction effect of diabetic status and renal function on nighttime SBP was detected in a general elderly population.

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Positive Effect of Daylight Exposure on Nocturnal Urinary Melatonin Excretion in the Elderly: A Cross-Sectional Analysis of the HEIJO-KYO Study

Abstract: Daylight exposure in an uncontrolled daily life setting is positively associated with urinary 6-sulfatoxymelatonin excretion in the elderly.

Cited by 106 publications

References 39 publications

Physiological Levels of Melatonin Relate to Cognitive Function and Depressive Symptoms: The HEIJO-KYO Cohort

Physiological Levels of Melatonin Relate to Cognitive Function and Depressive Symptoms: The HEIJO-KYO Cohort

Methodology of Applying Control Science to Sustainable Housing Design

Nighttime BP in Elderly Individuals with Prediabetes/Diabetes with and without CKD: The HEIJO-KYO Study

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