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農村病院における高齢者の肺炎球菌ワクチン接種率向上のための計画・実行・調査・改善(PDSA)に基づく品質改善プロジェクト
Ryuichi Ohta1, Koki Kato2, Chiaki Sano3
1Community Care, Unnan City Hospital, Unnan, JPN.
Cureus
|December 22, 2025
まとめ
日本の農村における品質改善プロジェクトが、高齢者の肺炎球菌ワクチン接種率を大幅に向上させた。教育と電子リマインダーを用いた介入により、3ヶ月で接種率は17.4%から65.0%に増加した。
科学分野:
- 公衆衛生
- 老年医学
- ヘルスケア品質改善
背景:
- 肺炎球菌性肺炎は高齢者にとって主要な健康問題であり、特に医療アクセスが限られている農村地域ではそのリスクが高い。
- 国の推奨にもかかわらず、日本の農村における肺炎球菌性肺炎のワクチン接種率は最適とは言えない。
- 患者教育、リマインダーシステム、ワークフローの改善は、外来設定における予防ケアを強化することができる。
研究 の 目的:
- 農村の病院の高齢患者の肺炎球菌ワクチン接種率を3ヶ月以内に少なくとも20%向上させるための品質改善プロジェクトを実施し、評価すること。
- 電子医療記録(EMR)ベースのリマインダー、患者教育、専門職連携を統合した多成分介入の実現可能性とスケーラビリティを評価すること。
主な方法:
- 2025年2月から4月にかけて、海田市病院で計画・実行・調査・改善(PDSA)フレームワークを使用した。
- 介入には、患者およびスタッフ向けの教育用パンフレット、電子医療記録(EMR)ベースのリマインダー、慢性疾患を持つ65歳以上の患者向けの標準化されたワクチン接種フローシートが含まれた。
- ワクチン接種率、医師の推奨率、リマインダー率の変化を評価するために、中断時系列分析(ITSA)を採用した。
主要な成果:
- ベースラインの肺炎球菌ワクチン接種率は17.4%であったが、介入後3ヶ月以内に65.0%に増加した。
- ITSAは、ワクチン接種率の週あたり3.97パーセンテージポイントの有意な増加を示した(p < 0.001)。
- 医師の推奨率は24%から83%に上昇し、リマインダー率は91%を超えた。スタッフの満足度も向上した。
結論:
- 多成分介入により、農村病院における高齢者の肺炎球菌ワクチン接種率が大幅に増加した。
- EMRリマインダー、患者教育、協働的実践の統合は、農村地域における成人ワクチン接種を強化するための実現可能でスケーラブルなモデルである。
- このQIプロジェクトは、同様の医療環境におけるワクチン接種率向上のための実践的なフレームワークを提供する。
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