Graham D Y, Smith J L
Gastroenterology. 1981 Apr;80(4):800-9.
We analyzed the clinical course of 85 consecutive, endoscopically verified variceal bleeders. Most patients were alcoholics with advanced stages of hepatic dysfunction. Bleeding was major in all, and medical mortality was 42% at 6 wk. Factors affecting mortality and factors not affecting survival, such as age and comorbid conditions, were identified. Sixty percent of early deaths and 40% of late deaths were attributable to bleeding. Approximately one-third of patients experienced rebleeding within 6 wk, and one-third of survivors experienced subsequent bleeds. In these patients significant improvement with observation was often anticipated, but could not be verified. The majority of deaths associated with variceal bleeding occur soon after the bleeding episode. Those who survive the hospitalization for bleeding may not fare worse than others of similar hepatic functional reserve but who have not experienced bleeding. We demonstrated that statistically significantly different survival curves could be obtained from the same population by changing the zero time for calculating survival. For example, a 1-yr survival rate of 34% for all medically treated patients could be raised to 52% by eliminating from consideration those who failed to survive 2 wk. The long-term survival course of those surviving greater than 2 wk was not statistically significantly different from published series of unselected cirrhotics without bleeding. Variceal bleeding is a common accompaniment of advanced liver disease. We propose that any substantial improvement in long-term survival must improve survival for the early period. If controlled trials are to be done, patients should be matched for hepatic functional reserve and identical zero time for calculating survival must be used.
我们分析了连续85例经内镜证实的静脉曲张出血患者的临床病程。大多数患者为患有晚期肝功能障碍的酗酒者。所有患者均发生大出血,6周时的医疗死亡率为42%。确定了影响死亡率的因素以及不影响生存的因素,如年龄和合并症。60%的早期死亡和40%的晚期死亡归因于出血。约三分之一的患者在6周内再次出血,三分之一的幸存者随后再次出血。在这些患者中,通常预期观察会有显著改善,但无法得到证实。与静脉曲张出血相关的大多数死亡发生在出血事件后不久。那些出血住院存活的患者,其预后可能并不比其他具有相似肝功能储备但未经历出血的患者更差。我们证明,通过改变计算生存的零时间,可以从同一人群中获得统计学上显著不同的生存曲线。例如,通过排除未能存活2周的患者,所有接受药物治疗患者的1年生存率可从34%提高到52%。存活超过2周的患者的长期生存病程与已发表的未选择的无出血肝硬化患者系列相比,在统计学上无显著差异。静脉曲张出血是晚期肝病的常见伴随症状。我们提出,长期生存的任何实质性改善都必须提高早期的生存率。如果要进行对照试验,患者应在肝功能储备方面进行匹配,并且必须使用相同的计算生存的零时间。