Japanese people in both Japan and in Hawaii have a lower incidence of hip fractures than white people in Hawaii or on the mainland of the United States. Hip fractures usually occur after a fall, and differing incidence rates of falls might contribute to the observed differences in hip fracture rates. To investigate this possibility we undertook a prospective study of falls among elderly Japanese men and women living in Hawaii using intensive surveillance methods similar to those used in studies of predominantly white populations. For our Japanese participants, the incidence rates of total falls were 139 per 1000 person years for men and 276 per 1000 person years for women. Age adjusted rate ratios of falls for predominantly white populations compared with our Japanese participants ranged from 1.8 to 2.3 for women and from 2.6 to 4.7 for men. The risk of injuries when they did fall, however, was not lower for our Japanese participants than reported for white participants. For our Japanese population, past falls, female gender, and daytime hours were associated with an increased incidence of falls.

译文

日本和夏威夷的日本人髋部骨折的发生率都比夏威夷或美国本土的白人低。髋部骨折通常发生在跌倒后,不同的跌倒发生率可能会导致观察到的髋部骨折发生率差异。为了调查这种可能性,我们使用了类似于以白人为主的研究中使用的强化监测方法,对居住在夏威夷的日本老年男性和女性的跌倒进行了前瞻性研究。对于我们的日本参与者,男性的总跌倒发生率为139/1000人年,女性为276/1000人年。与我们的日本参与者相比,以白人为主的年龄调整后的跌倒率比率为女性的1.8至2.3,男性的2.6至4.7。但是,我们的日本参与者跌倒时受伤的风险并不比白人参与者低。对于我们的日本人口,过去的跌倒,女性性别和白天的时间与跌倒的发生率增加有关。

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