Relationship between chronological and bone ages and pubertal stage of breasts with bone biomarkers and bone mineral density in adolescents

• Những tác giả chính: Cristina Maria Teixeira Fortes (Tác giả), Tamara Beres Lederer Goldberg (Tác giả), Cilmery Suemi Kurokawa (Tác giả), Carla Cristiani Silva (Tác giả), Maria Regina Moretto (Tác giả), Talita Poli Biason (Tác giả), Altamir Santos Teixeira (Tác giả), Hélio Rubens de Carvalho Nunes (Tác giả)
• Định dạng: Sách
• Được phát hành: Brazilian Society of Pediatrics, 2014-11-01T00:00:00Z.
• Những chủ đề: article
• Truy cập trực tuyến: Connect to this object online.

Tóm tắt

Objective: To study bone mineral density (BMD) in adolescent females according to five groups of chronological age (CA), bone age (BA), and breast development stage (B), and to correlate these parameters with plasma bone biomarkers (BB). Methods: This was a cross‐sectional study performed in 101 healthy adolescent females between 10 and 20 years old. The study variables were: weight, height, body mass index (BMI), CA, B, BA, calcium intake, BMD, and BB. Osteocalcin (OC), bone alkaline phosphatase (BAP), and C‐terminal telopeptide (S‐CTx) were evaluated for BB. BMD was measured using dual energy X‐ray absorptiometry (DXA). Results: BMD in lumbar spine, proximal femur, and total body increased with age, and the respective observed averages were: in CA1 (10 years old), 0.631, 0.692, 0.798 g/cm2; in CA2 (11 to 12 years old), 0.698, 0.763, 0.840 g/cm2; in CA3 (13 to 14 years old), 0.865, 0.889, 0.972 g/cm2; in CA4 (15 to 16 years old), 0.902, 0.922, 1.013 g/cm2; and in CA5 (17 to 19 years old), 0.944, 0.929, 1.35 g/cm2. These results showed significant differences between 13 and 14 years of age (CA3) or when girls reached the B3 stage (0.709, 0.832, 0.867 g/cm2). The highest median concentrations of BB were between 10 and 12 years of age when adolescents were in the B2-B3 (p < 0.001). Median BB concentrations decreased in advanced BA and B. Conclusions: BB concentrations were positively correlated with the peak height velocity and negatively correlated with BMD in the study sites. Increased BMD and BB concentrations were observed in B3.

Mô tả sách

2255-5536
10.1016/j.jpedp.2014.04.007