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90 MEASURED FINAL HEIGHT AND TARGET HEIGHT IN BOYS WITH CONSTITUTIONAL GROWTH DELAY

There is considerable dispute as to whether boys with constitutional growth delay (CGD) do reach their target height (mid-parental height + 6.5cm). To answer this question, patients with short stature and CGD seen at our institution within the last 15 years are being restudied. So far, 20 adult males have been seen and their height has been measured by stadiometer. At the initial presentation, chronological age was 14.0±1.6(SD)yr, bone age 11.4±1.7yr, height 147.4±7.1cm, testicular volume 5.6±3.7mL. A positive family history with late menarche >14yr in the mother and/or continued fast growth >16yr in the father could be elicited in 18/20 patients. When restudied, chronological age was 22.7±1.7yr (20.2-26.9), testicular volume 23.0±4.3mL, final height 171.9±5.2cm. This height was very close to the self-estimate of the patients (171.8±5.5cm). Moreover, it was not significantly different from the target height of 173.1±4.3cm and from the initial Bayley-Pinneau prediction of 172.2±6.7cm (paired t-test). We conclude that on the average our patients with CGD did reach their full height potential and Bayley-Pinneau predictions were useful.