A preliminary study on designing a cluster randomized control trial of two new mosquito nets to prevent malaria parasite infection

• 資料種別: 記事
• タイトル: A preliminary study on designing a cluster randomized control trial of two new mosquito nets to prevent malaria parasite infection
• 著者・編者: Noboru Minakawa; James O. Kongere; George O. Sonye
• 出版事項: 日本 : Springer Nature
• 出版年月日等: 2020-12-07
• 出版年（W3CDTF）: 2020-12-07
• タイトル（掲載誌）: Tropical medicine and health
• 巻号年月日等（掲載誌）: 48(98)
• 掲載巻: 48(98)
• ISSN（掲載誌）: 1349-4147
• ISSN-L（掲載誌）: 1348-8945
• 本文の言語コード: eng
• DOI: 10.1186/s41182-020-00276-x; https://doi.org/10.1186/s41182-020-00276-x
• 国立国会図書館永続的識別子: info:ndljp/pid/11616182; https://dl.ndl.go.jp/pid/11616182
• コレクション（共通）: 障害者向け資料
• コレクション（障害者向け資料：レベル1）: テキストデータ
• コレクション（個別）: 国立国会図書館デジタルコレクション > 電子書籍・電子雑誌 > その他; https://dl.ndl.go.jp/collections/B00035
• 収集根拠: オンライン資料収集制度
• 受理日（W3CDTF）: 2021-01-13T14:13:05+09:00
• 保存日（W3CDTF）: 2021-01-13
• 記録形式（IMT）: application/pdf
• オンライン閲覧公開範囲: 国立国会図書館内限定公開
• デジタル化資料送信: 図書館・個人送信対象外
• 遠隔複写可否（NDL）: 可
• 掲載誌（URI）: https://tropmedhealth.biomedcentral.com/articles
• 掲載誌（国立国会図書館永続的識別子）: info:ndljp/pid/11467623; https://dl.ndl.go.jp/pid/11467623
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp

• 要約等: Background: Although long-lasting insecticidal nets (LLINs) are the most effective tool for preventing malaria parasite transmission, the nets have some limitations. For example, the increase of LLIN use has induced the rapid expansion of mosquito insecticide resistance.More than two persons often share one net, which increases the infection risk. To overcome these problems, two new mosquito nets were developed, one incorporating piperonyl butoxide and another covering ceilings and open eaves. We designed a cluster randomized controlled trial (cRCT) to evaluate these nets based on the information provided in the present preliminary study. Results: Nearly 75% of the anopheline population in the study area in western Kenya was Anopheles gambiae s. l., and the remaining was Anopheles funestus s. l. More female anophelines were recorded in the western part of the study area. The number of anophelines increased with rainfall. We planned to have 80% power to detect a 50% reduction in female anophelines between the control group and each intervention group. The between-cluster coefficient of variance was 0.192. As the number of clusters was limited to 4 due to the size of the study area, the estimated cluster size was 7 spray catches with an alpha of 0.05. Of 1619 children tested, 626 (48%) were Plasmodium falciparum positive using a rapid diagnostic test (RDT). The prevalence was higher in the northwestern part of the study area. The number of children who slept under bed nets was 929 (71%). The P. falciparum RDT-positive prevalence (RDTpfPR) of net users was 45%, and that of non-users was 55% (OR 0.73; 95% CI 0.56, 0.95). Using 45% RDTpfPR of net users, we expected each intervention to reduce prevalence by 50%. The intracluster correlation coefficient was 0.053. With 80% power and an alpha of 0.05, the estimated cluster size was 116 children. Based on the distribution of children, we modified the boundaries of the clusters and established 300-m buffer zones along the boundaries to minimize a spillover effect. Conclusions: The cRCT study design is feasible.As the number of clusters is limited, we will apply a two-stage procedure with the baseline data to evaluate each intervention.; Tropical Medicine and Health, 48(1), art.no.98; 2020
• DOI: 10.1186/s41182-020-00276-x; https://doi.org/10.1186/s41182-020-00276-x
• オンライン閲覧公開範囲: インターネット公開
• 著作権情報: c The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you giveappropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commonslicence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commonslicence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
• 関連情報（URI）: http://hdl.handle.net/10069/40454; https://nagasaki-u.repo.nii.ac.jp/records/26250; http://id.ndl.go.jp/digimeta/11616182; https://dl.ndl.go.jp/pid/11616182; https://search.jamas.or.jp/link/ui/2022060681
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 提供元機関・データベース: 学術機関リポジトリデータベース; https://irdb.nii.ac.jp; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp; CiNii Articles
• 書誌ID（NDLBibID）: 11616182; http://id.ndl.go.jp/bib/11616182
• NII論文ID: 120006980743