Quantitative Association between Nocturnal Void Frequency and Objective Sleep Quality in the General Elderly Population: The HEIJO-KYO Cohort
Obayashi K*, Saeki K, Kurumatani N
Sleep Med, 16(5) 577-582, May, 2015

Independent associations between nocturia and nighttime blood pressure/dipping in elderly individuals: the HEIJO-KYO cohort
Obayashi K*, Saeki K, Kurumatani N
J Am Geriatr Soc, 63(4) 733-738, Apr, 2015

Light exposure at night is associated with subclinical carotid atherosclerosis in the general elderly population: the HEIJO-KYO cohort
Obayashi K*, Saeki K, Kurumatani N
Chronobiol Int, 32(3) 310-317, Mar, 2015

Higher melatonin secretion is associated with lower leukocyte and platelet counts in the general elderly population: the HEIJO-KYO cohort
Obayashi K*, Saeki K, Kurumatani N
J Pineal Res, 58(2) 227-233, Feb, 2015

Lower melatonin secretion in older female: gender differences independent of light exposure profiles
Obayashi K*, Saeki, K, Tone N, Iwamoto J, Miyata K, Ikada Y, Kurumatani N
J Epidemiol, 25(1) 38-43, Jan, 2015

Reliability and validity of the Japanese version of the KIDSCREEN-52 health-related quality of life questionnaire for children/adolescents and parents/proxies
Nezu S, Iwasaka H, Saeki K, Ishizuka R, Goma H, Okamoto N, Makino H, Tanimura M, Yoshizaki K, Obayashi K, Kurumatani N
Environ Health Prev Med, 20(1) 44-52, Jan, 2015

Asymmetric Dimethylarginine Attenuates the Associations of Melatonin Secretion with Nighttime Blood Pressure and Dipping in Elderly Individuals: The HEIJO-KYO Cohort
Obayashi K*, Saeki K, Kurumatani N
Circ J, 25(12) 2908-2914, Dec, 2014

The CLOCK-IOL Study about the Short-Term Influence of Cataract Surgery on Circadian Biological Rhythm and Related Health Outcomes: Study Protocol for A Randomized Controlled Trial
Saeki K, Obayashi K, Nishi T, Miyata K, Maruoka S, Ueda T, Okamoto M, Hasegawa T, Matsuura T, Tone N, Ogata N, Kurumatani N
Trials, 15 514, Dec, 2014

Relationship between Melatonin Secretion and Nighttime Blood Pressure in Elderly Individuals With and Without Antihypertensive Treatment: A Cross-sectional Study of the HEIJO-KYO Cohort
Obayashi K*, Saeki K, Tone N, Kurumatani N
Hypertens Res, 37(10) 908-913, Oct, 2014

Association between Light Exposure at Night and Insomnia in the General Elderly Population: The HEIJO-KYO Cohort
Obayashi K*, Saeki K, Kurumatani N
Chronobiol Int, 31(9) 976-982, Sep, 2014