@article{01684b413ab54859be4d8af90421b6b8,
title = "Seasonal variation in the incidence of hip fracture among white persons aged 65 years and older in the united states, 1984-1987",
abstract = "This study uses 44 consecutive months of data from the Health Care Financing Administration to assess seasonal trends in hip fracture incidence among the United States white population aged 65 years and older. The authors studied a total of 621,387 cases of hip fracture which occurred from January 1984 to September 1987. During the study period, hip fracture incidence rates display a distinctive pattern of seasonal periodicity; high rates are found in the winter and low rates in the summer among both males and females. This pattern of seasonal periodicity is consistent at ages 65-74 years, 75-84 years, and ≥85 years. When the time series of rates are stratified into five geographic levels, each level covering 5° of latitude, the distinctive pattern of seasonal periodicity is the same for all levels. Am J Epidemiol 1991 ;133:996-1004.",
keywords = "Age factors, Hip fractures, Incidence, Sex factors, Time factors",
author = "Jacobsen, {Steven J.} and Jack Goldberg and Miles, {Toni P.} and Brody, {Jacob A.} and William Stiers and Rimm, {Alfred A.}",
note = "Funding Information: Received for publication May 11,1990, and in final form December 26, 1990. Abbreviations. HCFA, Health Care Financing Administration; MEDPAR, Medicare Provider Analysis and Review Record. ' Epidemiology Program, School of Public Health, University of Illinois at Chicago, Chicago, IL. 2 Division of Biostatistics/Clinical Epidemiology, Medical College of Wisconsin, Milwaukee, Wl. 3Cooperative Studies Program Coordinating Center, Hines Hospital, Department of Veterans Affairs, Hines, IL. 4Health Services Research and Development, Hines Hospital, Department of Veterans Affairs, Hines, IL. Reprint requests to: Dr. Steven J. Jacobsen, Division of Biostatistics/Clinical Epidemiology, Medical College of Wisconsin, P.O. Box 26509, Milwaukee, Wl 53226. This work was supported by grant no. RO-1-AG-08709 from the National Institutes of Health, and a grant from the National Osteoporosis Foundation. The authors thank Dr. John Baron for his review of earlier versions of this manuscript.",
year = "1991",
month = may,
day = "15",
doi = "10.1093/oxfordjournals.aje.a115819",
language = "English (US)",
volume = "133",
pages = "996--1004",
journal = "American Journal of Epidemiology",
issn = "0002-9262",
publisher = "Oxford University Press",
number = "10",
}