Hokuriku-plus familial hypercholesterolaemia registry study: rationale and study design

• Main Authors: Hiroshi Matsumoto, Akihiro Nomura, Hayato Tada, Hirofumi Okada, Atsushi Nohara, Masa-aki Kawashiri, Koji Maeno, Manabu Fujimoto, Shohei Yoshida, Masaya Shimojima, Toyonobu Tsuda, Mika Mori, Shin-ichiro Takashima, Takeshi Kato, Soichiro Usui, Kenji Sakata, Kenshi Hayashi, Noboru Fujino, Akihiro Inazu, Shizuko Takahara, Yasuhito Imai, Takao Matsubara, Kenji Miwa, Masanobu Namura, Hidenobu Terai, Taiji Yoshida, Tsutomu Araki, Masahiro Minamoto, Toru Aburao, Yuji Ito, Chiaki Nakanishi, Suguru Kawasaki, Yasuhiro Todo, Junji Koizumi, Yoshihito Kita, Hiroaki Shintaku, Akihiko Hodatsu, Hidekazu Ino, Toshinori Higashikata, Mutsuko Takata, Katsushi Misawa, Masato Yamaguchi, Yoshihiro Noji, Kazuo Osato, Tomohito Mabuchi, Taro Ichise, Bunji Kaku, Shoji Katsuda, Katsuharu Uchiyama, Kensuke Fujioka, Takuya Nakahashi, Tsuyoshi Nozue, Ichiro Michishita, Kazuo Usuda, Kanichi Otowa, Kazuyasu Okeie, Satoshi Hirota, Isao Aburadani, Keisuke Kurokawa, Osamu Takatori, Shunichiro Hondo, Hiroyuki Oda, Shigeo Takata, Hisayoshi Murai, Masaki Kinoshita, Hideo Nagai, Yoshiteru Sekiguchi, Satoru Sakagami, Wataru Omi, Chikara Fujita, Tatsuo Katsuki, Hiroshi Ootsuji, Atsushi Igarashi, Manabu Nakano, Seiichiro Okura, Yasuhito Mitamura, Naoki Sugimoto, Masakazu Yamamoto, Hironobu Akao, Kouji Kajinami, Masayuki Takamura
• Format: Article
• Language: English
• Published: BMJ Publishing Group 2020-09-01
• Series: BMJ Open
• Online Access: https://bmjopen.bmj.com/content/10/9/e038623.full
• ISSN: 2044-6055

Introduction Familial hypercholesterolaemia (FH) is an autosomal-dominant inherited genetic disease. It carries an extremely high cardiovascular risk associated with significantly elevated low-density lipoprotein (LDL) cholesterol. The diagnostic rate of this disease in some European nations is quite high, due to the presence of multiple prospective registries. On the other hand, few data—and in particular multicentre data—exist regarding this issue among Japanese subjects. Therefore, this study intends to assemble a multicentre registry that aims to comprehensively assess cardiovascular risk among Japanese FH patients while taking into account their genetic backgrounds.Methods and analysis The Hokuriku-plus FH registry is a prospective, observational, multicentre cohort study, enrolling consecutive FH patients who fulfil the clinical criteria of FH in Japan from 37 participating hospitals mostly in Hokuriku region of Japan from April 2020 to March 2024. A total of 1000 patients will be enrolled into the study, and we plan to follow-up participants over 5 years. We will collect clinical parameters, including lipids, physical findings, genetic backgrounds and clinical events covering atherosclerotic and other important events, such as malignancies. The primary endpoint of this study is new atherosclerotic cardiovascular disease (ASCVD) events. The secondary endpoints are as follows: LDL cholesterol, secondary ASCVD events and the occurrence of other diseases including hypertension, diabetes and malignancies.Ethics and dissemination This study is being conducted in compliance with the Declaration of Helsinki, the Ethical Guidelines for Medical and Health Research Involving Human Subjects, and all other applicable laws and guidelines in Japan. This study protocol has been approved by the Institutional Review Board at Kanazawa University. We will disseminate the final results at international conferences and in a peer-reviewed journal.Trial registration number UMIN000038210.