Relationship Among Macronutrients, Dietary Components, and Objective Sleep Variables Measured by Smartphone Apps: Real-World Cross-Sectional Study

Jaehoon Seol   ^{1, 2, 3, 4} , PhD ;   Masao Iwagami   ^{1, 5} , MD, PhD ;   Megane Christiane Tawylum Kayamare   ^{1, 6} , MS ;   Masashi Yanagisawa   ^{1, 7, 8, 9, 10} , MD, PhD

¹ International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Tsukuba, Ibaraki, Japan

² Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan

³ Department of Frailty Research, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, Obu, Aichi, Japan

⁴ Research Team for Promoting Independence and Mental Health, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan

⁵ Institute of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan

⁶ PhD Program in Humanics, University of Tsukuba, Tsukuba, Ibaraki, Japan

⁷ S’UIMIN Inc, Shibuya, Tokyo, Japan

⁸ Life Science Center for Survival Dynamics (TARA), University of Tsukuba, Tsukuba, Ibaraki, Japan

⁹ R&D Center for Frontiers of Mirai in Policy and Technology (F-MIRAI), University of Tsukuba, Tsukuba, Ibaraki, Japan

¹⁰ Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX, United States