Predictive Validity of Hospital-Associated Complications of Older People Identified Using Diagnosis Procedure Combination Data From an Acute Care Hospital in Japan: Observational Study

Seigo Mitsutake   ^{1, 2} , PhD, PT ;   Tatsuro Ishizaki   ¹ , MD, PhD, MPH ;   Shohei Yano   ^{1, 3} , PT, PhD ;   Takumi Hirata   ¹ , MD, PhD, MPH ;   Kae Ito   ¹ , MD, PhD ;   Ko Furuta   ⁴ , MD ;   Yoshitomo Shimazaki   ⁵ , RPh, PhD ;   Hideki Ito   ⁶ , MD, PhD ;   Alison Mudge   ^{7, 8} , MD, PhD ;   Kenji Toba   ⁶ , MD, PhD

¹ Human Care Research Team, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo, Japan

² Australian Institute of Health Innovation, Macquarie University, Sydney, Australia

³ The Salvation Army Booth Memorial Hospital, Tokyo, Japan

⁴ Department of Psychiatry, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo, Japan

⁵ Department of Pharmacy, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo, Japan

⁶ Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo, Japan

⁷ Department of Internal Medicine and Aged Care, Royal Brisbane and Women’s Hospital, Brisbane, Australia

⁸ Centre of Health Services Research, The University of Queensland, Brisbane, Australia