Incident Vertebral Fractures in Children With Leukemia During the Four Years Following Diagnosis
2015
Objectives: The purpose of this article was to determine the incidence and predictors of vertebral fractures (VF) during the 4 years after diagnosis in pediatric acute lymphoblastic leukemia (ALL). Patients and Methods: Children were enrolled within 30 days of chemotherapy initiation, with incident VF assessed annually on lateral spine radiographs according to the Genant method. Extended Cox models were used to assess the association between incident VF and clinical predictors. Results: A total of 186 children with ALL completed the baseline evaluation (median age, 5.3 years; interquartile range, 3.4–9.7 years; 58% boys). The VF incidence rate was 8.7 per 100 person-years, with a 4-year cumulative incidence of 26.4%. The highest annual incidence occurred at 12 months (16.1%; 95% confidence interval [CI], 11.2–22.7), falling to 2.9% at 4 years (95% CI, 1.1–7.3). Half of the children with incident VF had a moderate or severe VF, and 39% of those with incident VF were asymptomatic. Every 10 mg/m2 increase in...
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