ECLIPSE (Evaluation of COPD Longitudinally to Identify Predictive Surrogate Endpoints) 2164名のCOPD患者、主要素13項目の3年間フォローアップ重大アウトカム関連サブグループ解析
http://www.atsjournals.org/doi/abs/10.1513/AnnalsATS.201403-125OC
Identification of Five Chronic Obstructive Pulmonary Disease Subgroups with Different Prognoses in the ECLIPSE Cohort Using Cluster Analysis
Stephen I. et. al. ; on behalf of the Evaluation of COPD Longitudinally to Identify Predictive Surrogate Endpoints
Annals of the American Thoracic Society, Vol. 12, No. 3 (2015), pp. 303-312.
doi: 10.1513/AnnalsATS.201403-125OC
- Cluster A included patients with milder disease and had fewer deaths and hospitalizations.
- Cluster B had less systemic inflammation at baseline but had notable changes in health status and emphysema extent.
- Cluster C had many comorbidities, evidence of systemic inflammation, and the highest mortality.
- Cluster D had low FEV1, severe emphysema, and the highest exacerbation and COPD hospitalization rate.
- Cluster E was intermediate for most variables and may represent a mixed group that includes further clusters.
クラスターEが屑箱になっている・・・
喘息、COPDなどでクラスター解析盛んになっているが、要素検討項目やアウトカム項目により左右されるのは必然
Respiratory medicine Which patients with chronic obstructive pulmonary disease benefit from the addition of an inhaled corticosteroid to their bronchodilator? A cluster analysis
BMJ Open 2013;3:e001838 doi:10.1136/bmjopen-2012-001838
利尿剤使用せず、FEV1可逆性12%以上のCOPDでは、中等度・重度急性増悪アウトカムに関して、ICS投与でベネフィット有する。一方、利尿剤処方無し・可逆性認めない群ではICS上乗せ効果認めない。利尿剤を処方されてるクラスターは心血管疾患合併の可能性高い上記如く、処方選択に関わるプラクティカルなクラスター分析もあるアレルギー炎症示唆所見に過ぎないのかもしれない(http://intmed.exblog.jp/13601892/)
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