Assessing the Reliability and Validity of Principles for Health-Related Information on Social Media (PRHISM) for Evaluating Breast Cancer Treatment Videos on YouTube: Instrument Validation Study

Hiroki Kusama   ¹ , MD, PhD ;   Yoshimitsu Takahashi   ² , DrPH ;   Shunichiro Orihara   ³ , PhD ;   Kayo Adachi   ¹ , MD ;   Yumiko Ishizuka   ⁴ , MD, PhD ;   Ryoko Semba   ⁴ , MD, PhD ;   Hidetaka Shima   ⁵ , MD, PhD ;   Yoshiya Horimoto   ^{1, 4} , MD, PhD ;   Hiroshi Kaise   ⁶ , MD, PhD ;   Masataka Taguri   ³ , PhD ;   Sho Inoue   ⁷ , MD, PhD ;   Takeo Nakayama   ⁸ , MD, PhD ;   Takashi Ishikawa   ¹ , MD, PhD

¹ Department of Breast Surgical Oncology, Tokyo Medical University Hospital, Tokyo, Japan

² Department of Implementation Science in Public Health, School of Public Health, Kyoto University, Kyoto, Japan

³ Department of Health Data Science, Tokyo Medical University Hospital, Tokyo, Japan

⁴ Department of Breast Oncology, Faculty of Medicine, Juntendo University, Tokyo, Japan

⁵ Department of Breast Surgery, Douaikai Ozawa Hospital, Kanagawa, Japan

⁶ Department of Breast Surgical Oncology, Tokyo Medical University Ibaraki Medical Center, Ibaraki, Japan

⁷ YCU Co-Creation Innovation Center, Yokohama City University, Kanagawa, Japan

⁸ Department of Health Informatics, School of Public Health, Kyoto University, Kyoto, Japan