[Serum levels of 25-hydroxyvitamin D in children with attention deficit hyperactivity disorder].

Objective To examine serum 25-hydroxyvitamin D levels in children with attention deficit hyperactivity disorder(ADHD) and to explore the relationship between vitamin D level and ADHD. Methods Ninetyseven children with ADHD who were diagnosed according to DSM-V were selected as the ADHD group, including 46 cases of ADHD-I, 10 cases of ADHD-HI, and 41 cases of ADHD-C. Ninety-seven healthy children served as the control group. Serum levels of 25-hydroxyvitamin D were measured using electrochemiluminescence immunoassay. Results Mean serum levels of 25-hydroxyvitamin D in the ADHD group(17±7 ng/m L) were significantly lower than in the control group(23±8 ng/m L; P0.01). The serum levels of 25-hydroxyvitamin D in the three subtypes groups of ADHD(ADHD-I, ADHD-HI, and ADHD-C) were all lower than in the control group(P0.05). The rates of vitamin D insufficiency, deficiency or normal in the ADHD group were different from the control group(P0.01). The distributions of vitamin D levels in the three subtypes groups of ADHD were all different from the control group(P0.05). Conclusions Serum levels of 25-hydroxyvitamin D in children with ADHD are lower than in healthy children, suggesting vitamin D level might be related to ADHD.