竞争性风险分析以估计截肢发生率和下肢外周动脉疾病的风险
Santiago Callegari1, Kim G Smolderen1,2, Jacob Cleman1
1Vascular Medicine Outcomes (VAMOS) Program, Section of Cardiovascular Medicine, Yale University, New Haven, CT, USA.
Vascular medicine (London, England)
|September 2, 2024
概括
标准的统计方法高估了外周动脉疾病患者的重大截肢风险,特别是那些患有慢性肢体威胁性缺血症的患者. 竞争性风险分析可以更准确地评估血管结局研究中的截肢风险.
科学领域:
- 血管外科 血管外科
- 生物统计学 生物统计学
- 研究成果 研究成果 研究成果
背景情况:
- 周围动脉疾病 (PAD) 患者有截肢和死亡的高风险.
- 在标准的血管结局评估中,死亡率通常不被认为是竞争风险.
- 本研究调查了竞争风险对PAD重大截肢风险估计的影响.
研究的目的:
- 为了比较标准的时间到事件分析与PAD重大截肢风险的竞争性风险分析.
- 确定标准方法是否高估截肢风险,特别是在慢性肢体威胁性缺血 (CLTI) 中.
- 评估截肢风险预测的准确性,考虑到死亡率作为竞争风险.
主要方法:
- 利用了来自血管质量倡议注册表 (2017-2018) 的7273名CLTI和5095名非CLTI患者的数据.
- 从医疗保险索赔中获得的死亡率和截肢数据.
- 使用标准 (卡普兰-梅尔,考克斯回归) 和竞争风险 (阿伦-约翰森,细灰) 模型比较两年累积发病率和重大截肢风险.
主要成果:
- 在CLTI患者中,标准分析高估了2年重大截肢累计发病率的20.5% (年龄≥75) 和13.7% (年龄<75).
- 在老年CLTI患者中,标准考克斯回归高估了7.0%的调整后2年大截肢风险.
- 在非CLTI队列中也观察到过高估计,尽管在较小程度上.
结论:
- 标准的时间到事件分析膨胀了PAD患者,特别是那些患有CLTI的大型截肢的发生率和风险.
- 竞争性风险分析提供了一种更精确的方法来估计血管研究中的截肢风险.
- 准确的风险评估对于管理PAD患者和改善血管结果至关重要.
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