title: Rapidly increasing rates of hip fracture in Beijing, China.
abstract: The age-specific rates of hip fractures have been declining in most countries in the West but a few studies suggest that the rates might be increasing in areas of Asia that are undergoing urbanization. We previously conducted a population-based study of hip fracture rates in Beijing, China, in 1990 to 1992 that included validation of hip fracture cases. Using a similar approach to validate cases, we estimated the age-specific hip fracture rates in Beijing, China, for 2002 to 2006. Specifically, we obtained hospital discharge data for hip fractures that were reported to the Beijing Bureau of Public Health. To confirm the diagnoses, Beijing residence, and find cases missed by the public records we checked individual cases in the public health records against medical records in a random sample of Beijing hospitals. The rates from public health data were adjusted for these under- and overestimations. We found that between 1990 and 1992 and 2002 and 2006, the adjusted age-specific rates of hip fracture over age 50 years increased 2.76-fold (95% confidence interval [CI], 2.68-2.84) in women and 1.61-fold (95% CI, 1.56-1.66) in men. Over age 70 years, the age-specific rates increased 3.37-fold (95% CI, 3.28-3.47) in women and 2.01-fold (95% CI, 1.95-2.07) in men. From 2002 to 2006, the rates over age 50 years increased 58% in women and 49% in men. We conclude that the rate of hip fracture has been rising very rapidly in Beijing, China. Therefore, the burden of hip fractures may be shifting rapidly from the West to urbanizing areas of the East.
authors.affiliation: Department of Endocrinology, Key Laboratory of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, People's Republic of China.
authors.forename: Wei-Bo
authors.initials: WB
authors.lastname: Xia
authors.forename: Shu-Li
authors.initials: SL
authors.lastname: He
authors.forename: Ling
authors.initials: L
authors.lastname: Xu
authors.forename: Ai-Ming
authors.initials: AM
authors.lastname: Liu
authors.forename: Yan
authors.initials: Y
authors.lastname: Jiang
authors.forename: Mei
authors.initials: M
authors.lastname: Li
authors.forename: Ou
authors.initials: O
authors.lastname: Wang
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Xing
authors.forename: Yue
authors.initials: Y
authors.lastname: Sun
authors.forename: Steven R
authors.initials: SR
authors.lastname: Cummings
mesh_terms: D017677:Age Distribution; D002681:China / Q000453:epidemiology; D005260:Female; D006620:Hip Fractures / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D008297:Male; D013997:Time Factors