併発症,合併症,およびコーディングバイアス. 診断コードの数は,入院死亡率を予測する上で重要でしょうか?
L I Iezzoni1, S M Foley, J Daley
1Department of Medicine, Harvard Medical School, Beth Israel Hospital, Boston, MA 02215.
JAMA
|April 22, 1992
まとめ
診断コードを増やすことは,患者のリスク評価を改善しないかもしれません. 研究によると,コード数が多くても,糖尿病などの疾患は死亡リスクの低下と関連しており,コード化バイアスを示唆しています.
科学分野:
- 医療情報工学 医療情報工学
- 臨床流行病学 臨床流行病学とは
- バイオ統計学 バイオ統計学
背景:
- 管理医療データベースは,しばしば二次診断を制限し,患者のリスク評価をバイアスする可能性があります.
- メディケアプログラムは,コーディングの完全性を高め,リスク評価を改善するために,診断コードを増やしています.
研究 の 目的:
- 患者のリスク評価の正確性,特に死亡リスクに対する拡張診断コーディングの影響を調査する.
- 利用可能な診断コードの数を増やすことで,患者の死亡リスクの評価が改善されるかどうかを評価する.
主な方法:
- 1988年カリフォルニア州病院の退院抽象データを使用し,最大25の診断を可能にしました.
- 高齢患者 (≥65歳) の29の特定の二次診断と入院死亡リスクとの関係を評価した.
- 脳卒中,肺炎,急性心筋梗塞,心不全で入院した患者も含む.
主要な成果:
- いくつかの慢性疾患または併発性疾患 (例えば,糖尿病,以前の心筋梗塞) は,病院での死亡リスクの低下と矛盾的に関連していました.
- 発見は,リスクが増加すると予想される診断が,死亡した患者でより頻繁にコード化されていないことを示唆しています.
結論:
- 亡くなった患者の退院要約における慢性疾患または併発性疾患のコーディングに対するバイアスは,観察された矛盾した結果を説明する可能性がある.
- 単に利用可能な診断コードの数を増やすだけでは,コーディングの完全性やリスク評価の正確性を効果的に改善しない可能性があります.
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