Efficacy and Cost-effectiveness of Promotion Methods to Recruit Participants to an Online Screening Registry for Alzheimer Disease Prevention Trials: Observational Study

Kenichiro Sato   ^{1, 2} , MD, PhD ;   Yoshiki Niimi   ³ , MD, PhD ;   Ryoko Ihara   ⁴ , MD, PhD ;   Kazushi Suzuki   ⁵ , MD, PhD ;   Tatsushi Toda   ¹ , MD, PhD ;   Atsushi Iwata   ⁴ , MD, PhD ;   Takeshi Iwatsubo   ² , MD, PhD

¹ Department of Neurology, University of Tokyo Hospital, Tokyo, Japan

² Department of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan

³ Unit for Early and Exploratory Clinical Development, The University of Tokyo Hospital, Tokyo, Japan

⁴ Department of Neurology, Tokyo Metropolitan Geriatric Medical Center Hospital, Tokyo, Japan

⁵ Division of Neurology, Internal Medicine, National Defense Medical College, Saitama, Japan