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In the year 1982, 112 hip fractures - cervical and trochanteric - were recorded in residents of Malmö after having been admitted to hospitals. During that same year, a total of 463 hip fractures occurred in the city. The risk of sustanining a hip fracture was 11 times greater in hospital patients aged 50 years or more than in persons of the same age who had not been admitted to hospitals.
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Udén et al. (1986) studied this question.
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