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To keep secondary disorders to a minimum, the early diagnosis and treatment of ADHD and its possible comorbidities is important. Aside from the care of a specialist, several additional measures permit the integration of these children into a structured everyday school routine and thus also permit age-appropriate development.

Attention deficit and activity disorder is characterized by impaired concentration, increased impulsiveness and motor restlessness. In a high percentage of cases, the symptoms persist into adulthood. Untreated victims have an increased risk of: failing to realize their full potential with regard to school-leaving performance, of developing substance dependence, of dissocial development, and of becoming more prone to accidents during leisure activity, in traffic and at work. The treatment strategies recommended in guidelines issued by the German societies of child and adolescent psychiatry are evidence-based and reliably effective.

Body composition in 31 adolescent girls suffering from anorexia nervosa (AN) was measured at the time of hospitalization in order to assess the muscle/bone relationship as a potential source of the development of osteopenia. Differences in lean tissue, fat and bone mass in total body, weight bearing and non weight bearing limbs were estimated in AN and pair-matched controls aged 14.2 +/- 1.8 years (range: 9-17 years). Further, it was investigated if bone mineral density (BMD) better reflects the muscle/bone relationship than bone mineral content (BMC). At the distal radius parameters measured by peripheral quantitative computed tomography (pQCT) were used to estimate the association of volumetric bone density to bone strength and lean body mass. The correspondence to the same and different body regions was assessed. Total lean mass in the controls was closely related to total body bone mineral content (TBBMC), as was lean tissue and bone mass of the limb subregions (r = 0.82 to 0.93). In contrast, the correlation was significantly lower in AN (r = 0.33 to 0.77). In the controls, the pQCT-derived bone strength was correlated with muscle mass of the forearm (r = 0.78, p < 0.001), but only moderately in AN (r = 0.47, n.s.). Regional lean tissue was 11-20% and fat mass was 56-66% lower in AN (p < 0.01). After adjustment for height, TBBMC was different at p = 0.01. Within the limbs subregions, BMC (but not BMD) was different in both groups only in the upper arm and the thigh. BMC reflected the bone/muscle relationship better than BMD. Intra- and between group regressions gave no significant differences between weight bearing and non weight bearing limbs. In conclusion, the assessment of musculoskeletal factors may be a useful tool to develop individual preventive measures for therapy after recovery of our patients.