(14-02-13) Prevalence of Vitamin D Deficiency Among Overweight and Obese US Children.

Turer CB, Lin H, Flores G.
Source
Division of General Pediatrics, Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas; and.
Abstract
OBJECTIVE:Adequate vitamin D is essential for skeletal health in developing children. Although excess body weight is associated with risk of vitamin D deficiency, the national prevalence of and risk factors associated with vitamin D deficiency in overweight and obese children are unknown.METHODS:The prevalence of vitamin D deficiency (defined as 25-hydroxyvitamin-D <20 ng/mL) was determined in a sample of 6- to 18-year-old children who were enrolled in a cross-sectional study (the 2003-2006 National Health and Nutrition Examination Survey) in which body weight and height were measured directly. Children were classified as healthy-weight, overweight, obese, or severely obese by using recommended age- and gender-specificBMI-percentile cut points. Associations between BMI-percentile classification andvitamin D deficiency were examined after adjustment for relevant confounders. Sample weights were used to generate nationally representative estimates.RESULTS:The prevalence of vitamin D deficiency in healthy-weight, overweight, obese, and severely obese children was 21% (20%-22%), 29% (27%-31%), 34% (32%-36%), and 49% (45%-53%), respectively. The prevalence of vitamin D deficiency in severely obese white, Latino, and African-American children was 27% (3%-51%), 52% (36%-68%), and 87% (81%-93%), respectively. Compared with healthy-weight children, overweight, obese, and severely obese children had significantly greater adjusted odds of vitamin D deficiency. Modifiable factors associated withvitamin D deficiency in overweight/obese children were identified.CONCLUSIONS:Vitamin D deficiency is highly prevalent in overweight and obese children. The particularly high prevalence in severely obese and minority children suggests that targeted screening and treatment guidance is needed.

Source: Pediatrics. 2012 Dec 24. [Epub ahead of print]

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