Statistical Methods for Item Reduction in a Representative Lifestyle Questionnaire: Pilot Questionnaire Study

Alessio Staffini   ^{1, 2, 3} , MSc ;   Kento Fujita   ⁴ , MSc ;   Akiko Kishi Svensson   ^{1, 5, 6} , MD, MPH, PhD ;   Ung-Il Chung   ^{1, 7, 8} , MD, PhD ;   Thomas Svensson   ^{1, 5, 7} , MD, PhD

¹ Precision Health, Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, Tokyo, Japan

² Department of Economics and Finance, Catholic University of Milan, Milan, Italy

³ Data Solutions Division, Project Promotion Department, Albert Inc, Tokyo, Japan

⁴ Data Service Infrastructure Development Department, Service Infrastructure Division, IT-OT Innovation Division, Mobile Technology Unit, SoftBank Corp, Tokyo, Japan

⁵ Department of Clinical Sciences, Lund University, Malmö, Sweden

⁶ Department of Diabetes and Metabolic Diseases, The University of Tokyo, Tokyo, Japan

⁷ School of Health Innovation, Kanagawa University of Human Services, Kawasaki, Japan

⁸ Clinical Biotechnology, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan