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  • Title: Pubertal timing predicts leg length and childhood body mass index predicts sitting height in young adult men.
    Author: Lorentzon M, Norjavaara E, Kindblom JM.
    Journal: J Pediatr; 2011 Mar; 158(3):452-7. PubMed ID: 20961561.
    Abstract:
    OBJECTIVE: To investigate the impact of pubertal timing and childhood body mass index (BMI), both within normal range, on adult anthropometrics. STUDY DESIGN: Detailed growth charts were retrieved for the men participating in the population-based Gothenburg Osteoporosis and Obesity Determinants study. Age at peak height velocity and childhood BMI were calculated (n = 527), and anthropometric measurements were performed. RESULTS: Analysis of variance analysis of tertiles according to age at peak height velocity demonstrated that the early peak height velocity tertile had a lower adult height (180.9 ± 6.8 cm) compared with the middle tertile group (182.7 ± 6.9 cm, P < .05), and this difference was attributable to shorter leg length. No difference was seen for sitting height. In contrast, analysis of tertiles according to childhood BMI demonstrated low sitting height in the low BMI tertile (93.7 ± 3.3 cm for low, 94.6 ± 3.3, for middle, and 94.8 ± 3.3 cm for high childhood BMI tertiles, P < .05 and P < .01, respectively), but childhood BMI did not affect adult height and leg length. CONCLUSION: We demonstrate that subjects with early pubertal timing have reduced adult height and leg length, and subjects with low childhood BMI have reduced adult sitting height. Thus childhood body composition and pubertal timing have different impact on trunk growth and growth of long bones.
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