References
- Rubenstein LM, Chrischilles EA, Voelker MD. The impact of Parkinson’s disease on health status, health expenditures, and productivity. Estimates from the National Medical Expenditure Survey. Pharmacoeconomics 1997;12:486-98
- Suzuki K, Miyamoto M, Miyamoto T, et al. Sleep disturbances associated with Parkinson’s disease. Parkinsons Dis 2011;2011:219056
- Keranen T, Kaakkola S, Sotaniemi K, et al. Economic burden and quality of life impairment increase with severity of PD. Parkinsonism Relat Disord 2003;9:163-8
- Muangpaisan W, Mathews A, Hori H, et al. A systematic review of the worldwide prevalence and incidence of Parkinson's disease. J Med Assoc Thai 2011;94:749-55
- Moriwaka F, Tashiro K, Itoh K, et al. Prevalence of Parkinson’s disease in Hokkaido, the northernmost island of Japan. Intern Med 1996;35:276-9
- Osaki Y, Morita Y, Kuwahara T, et al. Prevalence of Parkinson’s disease and atypical parkinsonian syndromes in a rural Japanese district. Acta Neurol Scand 2011;124:182-7
- Yamawaki M, Kusumi M, Kowa H, et al. Changes in prevalence and incidence of Parkinson’s disease in Japan during a quarter of a century. Neuroepidemiology 2009;32:263-9
- Avidan A, Hays RD, Diaz N, et al. Associations of sleep disturbance symptoms with health-related quality of life in Parkinson's disease. J Neuropsychiatry Clin Neurosci 2013;25:319-26
- Corallo F, De Cola MC, Lo B, et al. Observational study of quality of life of Parkinson’s patients and their caregivers. Psychogeriatrics 2017;17:97-102
- Fan JY, Chang BL, Wu YR. Relationships among depression, anxiety, sleep, and quality of life in patients with Parkinson’s disease in Taiwan. Parkinsons Dis 2016;2016:4040185
- Muller B, Assmus J, Herlofson K, et al. Importance of motor vs. non-motor symptoms for health-related quality of life in early Parkinson’s disease. Parkinsonism Relat Disord 2013;19:1027-32
- Rana AQ, Ahmed US, Chaudry ZM, et al. Parkinson’s disease: a review of non-motor symptoms. Expert Rev Neurother 2015;15:549-62
- Visser M, Verbaan D, van RS, et al. A longitudinal evaluation of health-related quality of life of patients with Parkinson's disease. Value Health 2009;12:392-6
- Miyashita M, Narita Y, Sakamoto A, et al. Health-related quality of life among community-dwelling patients with intractable neurological diseases and their caregivers in Japan. Psychiatry Clin Neurosci 2011;65:30-8
- Johnson SJ, Kaltenboeck A, Diener M, et al. Costs of Parkinson’s disease in a privately insured population. Pharmacoeconomics 2013;31:799-806
- O’Brien JA, Ward A, Michels SL, et al. Economic burden associated with Parkinson disease. Psychiatric Times [Internet] 2009. Available at: http://www.psychiatrictimes.com/cerebrovascular-diseases/economic-burden-associated-parkinson-disease [Last accessed August 14, 2017]
- Kowal SL, Dall TM, Chakrabarti R, et al. The current and projected economic burden of Parkinson’s disease in the United States. Mov Disord 2013;28:311-18
- Chrischilles EA, Rubenstein LM, Voelker MD, et al. The health burdens of Parkinson’s disease. Mov Disord 1998;13:406-13
- Hobson DE, Lix LM, Azimaee M, et al. Healthcare utilization in patients with Parkinson’s disease: a population-based analysis. Parkinsonism Relat Disord 2012;18:930-5
- Low V, Ben-Shlomo Y, Coward E, et al. Measuring the burden and mortality of hospitalisation in Parkinson’s disease: a cross-sectional analysis of the English Hospital Episodes Statistics database 2009–2013. Parkinsonism Relat Disord 2015;21:449-54
- Peto V, Fitzpatrick R, Jenkinson C. Self-reported health status and access to health services in a community sample with Parkinson’s disease. Disabil Rehabil 1997;19:97-103
- Winter Y, von CS, Popov G, et al. Costs of illness in a Russian cohort of patients with Parkinson’s disease. Pharmacoeconomics 2009;27:571-84
- Yoritaka A, Fukae J, Hatano T, et al. The direct cost of Parkinson disease at Juntendo Medical University Hospital, Japan. Intern Med 2016;55:113-19
- Huse DM, Schulman K, Orsini L, et al. Burden of illness in Parkinson’s disease. Mov Disord 2005;20:1449-54
- Noyes K, Liu H, Li Y, et al. Economic burden associated with Parkinson’s disease on elderly Medicare beneficiaries. Mov Disord 2006;21:362-72
- WHO expert consultation. Appropriate body-mass index for Asian populations and its implications for policy and intervention strategies. Lancet 2004;363:157-63
- Charlson ME, Pompei P, Ales KL, et al. A new method of classifying prognostic comorbidity in longitudinal studies: development and validation. J Chronic Dis 1987;40:373-83
- Maruish ME. User’s manual for the SF36v2 health survey (3rd ed.). Lincoln, RI: Quality Metric Incorporated; 2011
- Brazier J, Roberts J, Deverill M. The estimation of a preference-based measure of health from the SF-36. J Health Econ 2002;21:271-92
- Reilly MC, Zbrozek AS, Dukes EM. The validity and reproducibility of a work productivity and activity impairment instrument. Pharmacoeconomics 1993;4:353-65
- Ministry of Health Labour and Welfare of Japan. Basic survey on wage structure (In Japanese) [Internet]. Tokyo: Ministry of Health, Labour and Welfare of Japan; 2011. Available at: http://www.mhlw.go.jp/toukei_hakusho/toukei/ [Last accessed August 3, 2017]
- Ministry of Health Law. 2013 Fiscal year trends of medical expenses (In Japanese) [Internet]. Tokyo, Japan: Ministry of Health, Labour and Welfare; 2014. Available at: http://www.mhlw.go.jp/topics/medias/c-med/2013/04/index.html [Last accessed August 3, 2017]
- OECD [Internet]. Average length of stay in hospitals, in Health at a Glance 2011: OECD Indicators. Paris: OECD Publishing; 2011. Available at: http://dx.doi.org/10.1787/health_glance-2011-33-en [Last accessed August 3, 2017]
- XE currency table: JPY – Japanese Yen [Internet]. Rate as per 2014 Jul 01. Available at: https://www.xe.com/currencytables/?from=JPY&date =2014-07-01 [Last accessed July 24, 2018]
- Ridgeway G, McCaffrey D, Morral A, et al. Toolkit for weighting and analysis of nonequivalent groups: a tutorial for the twang package. Santa Monica, CA: RAND corporation; 2017
- Gage H, Hendricks A, Zhang S, et al. The relative health related quality of life of veterans with Parkinson’s disease. J Neurol Neurosurg Psychiatry 2003;74:163-9
- Karlsen KH, Larsen JP, Tandberg E, et al. Quality of life measurements in patients with Parkinson’s disease: a community-based study. Eur J Neurol 1998;5:443-50
- Tsugawa J, Onozawa R, Fukae J, et al. Impact of insufficient drug efficacy of antiparkinson agents on patient’s quality of life: a cross-sectional study. BMC Neurol 2015;15:105