engleski

Ultrasound bone measurement - comparison between urban and rural adolescents

The estimated bone mineral density (eBMD) of the calcaneus was measured by Sahara Clinical Bone Sonometer" (Hologic Inc.,Waltham,MA) in 214 healthy Croatian adolescents, aged 15-18, residents of urban and rural regions. . Measured feet were size 4-11 as recommended my manufacturer. In addition to the ultrasound measuremet, height, weight and percentage of body fat were also measured and body mass index (BMI) was calculated. All girls were at least 2 years postmenarchal, with the history of regular menstrual cycles and Tanner stage 4 or 5. Pubertal boys had also Tanner stage 4 or 5. The main characteristics of studied adolescents are presented on the table: URBAN RURAL Girls Boys Girls Boys N 61 45 57 51 Age (years) 16.2+0.4 16.3+0.6 16.1+0.7 16.3+0.7 Height (cm) 166.9+5.9 179.8+7.3 165.4+6.3 178.3+6.3 Weight (kg) 59.0+7.2 70.4+11.1 60.9+7.6 71.8+9.5 BMI (kg/m2) 21.2+2.6 21.7+2.5 22.2+2.4 22.6+2.9 Menarche (years) 12.6+1.3 - 12.6+1.3 - EBMD (g/cm2) 0.544+0.115 0.540+0.134 0.547+0.111 0.556+0.117 There was no significant difference in any measured variables between urban and rural adolescents of the same sex. The percentage of body fat was higher in rural adolescents, both girls and boys (approx.3% and 6% respecitvely), but the difference did not reach the level of statistical significance. The e BMD was significantly correlated to the percentage of body fat (r=0.28-0.29), except for urban girls (r=-0.27 and R=-0.40, respectively), as well as to the height, but only for rural girls and boys (r=-0.28). In conclusion, there were no statistically significant difference between rural and urban adolescents in the terms of estimated bone mineral density measured by bone ultrsound. The eBMD significantly correlates with the percentage of body fat and the age of menarche.

bone mineral density; adolescents; ultrasound

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