Qiulian Wu

Gender Difference in Body Fat for Healthy Chinese Children and Adolescents

BACKGROUND This study aimed to establish gender-related differences and the percentile curves for total body fat mass percentage (Total FM%), trunk/appendicular fat mass ratio (TrAppFMR), and fat mass ratio as % fat trunk/% fat lower limb (TrLLFMR) in Chinese children and adolescents using dual-energy X-ray absorptiometry (DXA). METHODS Children (n = 1541; 764 girls) and adolescents aged 5 to 19 years were recruited from southern China. Total FM% and regional FM were measured by DXA. TrAppFMR values were calculated as trunk FM divided by appendicular FM, and TrLLFMR values were calculated as the ratio between the percentage of trunk FM and the percentage of lower limb FM. RESULTS Total FM% peaks for boys were at approximately age 11 years and continued to increase for girls throughout adolescence. Median Total FM% at the age of 19 years was 15.53% and 28.06% for boys and girls, respectively. Median TrAppFMR and TrLLFMR increases were 61% and 81% from 5 to 19 years of age in boys compared with those in girls, 31% and 54%. The curves for median TrAppFMR and TrLLFMR in girls were relatively flat, with TrAppFMR and TrLLFMR remaining near 1.0 after 16 years of age, whereas in boys, median TrAppFMR and TrLLFMR increased with age until approximately 19 years. CONCLUSIONS Gender differences in the patterns of proportion and distribution of body fat were found. We present sex-specific percentile curves for Total FM%-age, TrAppFMR-age, and TrLLFMR-age relationships in this population.

An Investigation of the Diagnostic Value of Bilateral Femoral Bone Mineral Density Measurements in Chinese Women and Men

They all suffered from open fractures; meanwhile they fall in an altitude less than their height. Type of fractures: 3 of B while 16 of C according to AO/ ASIF system. Damage of soft tissue: 1 of type I, 1 of IIIA and 1 of IIIB; 16 for type II Gustilo classification. Unilateral external fixator was mounted on hydroxyapatite coated pins (Orthofix, Italy). All the patients BMD were measured and they had calcium in oral contraceptives some of which took medicine of anti-osteoporosis Result: 19 patients had been followed up for more than 7 months. The mean follow-up was 9.1 months. 16 patients BMD !22.5SD 3 patients !22.5w2 1.0SD(by Lunar Prodigy). Most fractures (18) united primarily at a mean of 18 weeks. One patient with a type-IIIA open fracture had local infection with nonunion. No pin loosening was occurred. Conclusion: In the treatment of tibia open fracture in osteoporotic patients, the unilateral external fixator mounted on hydroxyapatite coated pins is safe and effective in providing stability and allowing early rehabilitation. It may become a proper way to deal osteoporotic fracture. Further confirmation by larger prospective trials is necessary. non-dominant hand BMD in men and women in different age groups (P ! 0.01). Left and right hand BMD was highly correlated (females: r 5 0.962, P ! 0.001; males: r 5 0.959, P ! 0.001). v Non-dominant hand BMD had a moderate but significant correlation with other skeletal sites: spine (female: r 5 0.588, males: r 5 0.556, P ! 0.001), total body (female: r 5 0.688, males: r 5 0.466, P ! 0.001), femur (females: neck r 5 0.536, total hip r 5 0.545, P ! 0.001). There was not a significant correlation between hand and femur BMD in men: neck r 5 0.065, total hip r 5 0.138, P O 0.05. In conclusion, Hand BMD measurements by DXA had satisfactory precision. Dominant hand BMD was significantly higher than non-dominant hand BMD in men and women of all age groups. Non-dominant hand BMD correlated moderately with total body and spine in women and men, and with femur neck and total femur in women. Further investigation may determine whether hand BMD is useful for clinical diagnosis of osteoporosis and prediction of fracture risk.