Résumé :
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[BDSP. Notice produite par INIST-CNRS rRQ0R0xB. Diffusion soumise à autorisation]. Context The incidence of distal forearm fractures in children peaks around the time of the pubertal growth spurt, possibly because physical activity increases at the time of a transient deficit in cortical bone mass due to the increased calcium demand during maximal skeletal growth. Changes in physical activity or diet may therefore influence risk of forearm fracture. Objective To determine whether there has been a change in the incidence of distal forearm fractures in children in recent years. Design, Setting and Patients Population-based study among Rochester, Minn, residents younger than 35 years with distal forearm fractures in 1969-1971,1979-1981,1989-1991, and 1999-2001. Main Outcome Measure Estimated incidence of distal forearm fractures in 4 time periods. Results Comparably age-and sex-adjusted annual incidence rates per 100000 increased from 263.3 (95% confidence interval [Cl], 231.1-295.4) in 1969-1971 to 322.3 (95% Cl, 285.3-359.4) in 1979-1981 and to 399.8 (95% Cl, 361.0-438.6) in 1989-1991 before leveling off at 372.9 (95% Cl, 339.1-406.7) in 1999-2001. Age-adjusted incidence rates per 100000 were 32% greater among male residents in 1999-2001 compared with 1969-1971 (409.4 [95% Cl, 359.9-459.0] vs 309.4 [95% Cl, 259.3-359.5] ; P=01) and 56% greater among female residents in the same time periods (334.3 [95% Cl, 288.6-380.1] vs 214.6 [95% Cl, 174.9-254.4] ; P<. the peak incidence and greatest increase occurred between ages years in boys girls. conclusions there has been a statistically significant of distal forearm fractures children adolescents but whether this is due to changing patterns physical activity decreased bone acquisition poor calcium intake or both unclear at present. given large number childhood however studies are needed define cause increase.>
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