Hasegawa, Junichi http://orcid.org/0000-0002-5789-1022
Nakao, Masahiro http://orcid.org/0000-0003-1137-027X
Ikeda, Tomoaki
Toyokawa, Satoshi
Jojima, Emi
Satoh, Shoji
Ichizuka, Kiyotake
Tamiya, Nanako
Nakai, Akihito
Fujimori, Keiya
Maeda, Tsugio
Takeda, Satoru
Suzuki, Hideaki
Ueda, Shigeru
Iwashita, Mitsutoshi
Ikenoue, Tsuyomu
Article History
Received: 14 May 2021
Accepted: 21 February 2022
First Online: 3 March 2022
Declarations
:
: All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study protocol was approved by the institutional review boards (IRBs) of the Operating Organization of the Japan Obstetric Compensation System for Cerebral Palsy (JOCSC; No.26–01, Aug. 5th, 2014). Since the waiver for informed consent was provided by the IRB, written informed consent was not obtained from the patients. However, patients were provided with the announcement of the implementation of a “case–control study for cerebral palsy and prevention of its recurrence.” (Additional file InternalRef removed) Although the analysis was retrospective, data for the anonymized JOCSC database were collected in a normal clinical setting and the confidentiality of the patients involved was protected. All patient records and information were anonymized and de-identified before the analysis.
: Not applicable.
: The authors declare that they have no competing interests.