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GAZZETTA MEDICA ITALIANA ARCHIVIO PER LE SCIENZE MEDICHE
A Journal on Internal Medicine and Pharmacology
Indexed/Abstracted in: BIOSIS Previews, EMBASE, Scopus, Emerging Sources Citation Index
Gazzetta Medica Italiana Archivio per le Scienze Mediche 1999 June;158(3):69-71
Seasonal variation of fractures of the hip in Copenhagen
Department of Orthopaedic Surgery, Frederiksberg Hospital, Department of Orthopaedic Surgery, Rigshospitalet, University of Copenhagen (Denmark)
Background. Seasonal effect on morbidity are known to have occurred since ancient times, and there are several conditions that show marked seasonal patterns, such as overall mortality, myocardial infarction and respiratory infection. Most of these conditions tend to occur more frequently in winter, and there is good evidence for a role of climatic factors. Some reports suggest the existence of seasonal changes in hip fracture incidence, with a peak in winter months, however other investigation have failed to confirm this finding. A study was therefore made of 5018 fractured hips in Copenhagen between 1978 and 1993.
Methods. During a period of 16 years (January 1978 - December 1993) all patients with hip fractures admitted to Frederiksberg University Hospital were recorded. The number of patients included in each month was noted and expressed as the number of patients included per 30-day period to eliminate the variation in the numher of days in different months.
Results. A total of 5018 hip fractures (4050 in women and 968 in men) were recorded. The median age was 80 years (range 13-102). A total of 2870 were cervical fractures and 2148 were pertrochanteric fractures. There were 6 per cent more fractures in the 6 colder months from November to April than in the rest of the year (p<0.01).
Conclusions. Our study seems to confirm a seasonal pattern for hip fracture.