1. Ministry of Health, Labor and Welfare: Statistics by social medical practice (http://www.mhlw.go.jp/toukei/saikin/hw/sinryo/tyosa15/index.html).
2. Impact of sleep characteristics and obesity on diabetes and hypertension across genders and menopausal status: the Nagahama Study;Matsumoto;Sleep,2018
3. Interpretation of medical score table April 2018 edition, Institute of Social Insurance.
4. The Japanese Circulation Society, Guidelines for diagnosis and treatment of cardiovascular diseases (2008-2009 Joint research group report) guidelines for the diagnosis and treatment of sleep apnea in the cardiovascular field (http://www.j-circ.or.jp/guideline/pdf/JCS2010.momomura.h.pdf).
5. Japanese Respiratory Society NPPV Guideline Preparation Committee,2015