横向研究结果显示老年人对抗凝剂华法令（arfarin）的需要量比青年人低。本文采用纵向研究方法，旨在探讨华法令需要量与年龄之间的关系。方法参与抗凝治疗的社区老年人104（男47、女57）例，华法令治疗时的年龄31－74岁，中位年龄59岁。华法令使用时间6－24（中位期10）年。华 Cross-sectional studies have shown that the elderly have lower requirements for arfarin, an anticoagulant, than younger people. This article uses a longitudinal approach to investigate the relationship between warfarin requirements and age. Methods A total of 104 elderly (104 male, 47 female) patients were enrolled in the anticoagulant treatment. The warfarin age ranged from 31 to 74 years, with a median age of 59 years. Warfarin usage time 6-24 (median 10) years. China