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The validity of the Bayley-Pinneau method in predicting final adult height at the onset of puberty in patients with classic congenital adrenal hyperplasia
, 2, 1
Affiliations- The Diabetes Endocrine, Metabolism Paediatric Unit (DEMPU), Children’s Hospital, Department of Paediatrics, Faculty of Medicine, Cairo University, Egypt
- Department of Medical Biochemistry, Faculty of Medicine, Cairo University, Cairo, Egypt
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Abstract
Introduction: The final adult height (FAH) of patients with congenital adrenal hyperplasia (CAH) is often lower than the predicted adult height (PAH) using the Bayley-Pinneau (B&P) method. The aim of the current work was to test the validity of B&P in predicting FAH from a bone age (BA) measurement performed at onset of puberty.
Material and ethods: This was a retrospective longitudinal observational convenience single-centre study. The study included 54 patients (male and female) with classic CAH, whether salt-wasting (SW) or simple virilising (SV), who had reached FAH. The results of auxological measurements and hormonal data around the time of puberty were retrieved from files. Predicted adult height (PAH) was calculated from a BA taken at onset of puberty and compared with FAH.
Results: The median PAH SDS at the onset of puberty (–1.5) was significantly greater than the median FAH SDS (–2.2) (p < 0.001). The median target height SDS (–0.8) was significantly higher than the median FAH SDS (–2.2) (p < 0.001). FAH and FAH SDS were significantly worse in females (150.36 ± 7.23; –2.05 ± 1.13) than in their male counterparts (162.86 ± 3.30; –1.53 ± 0.51) (p value < 0.001; 0.048). In patients with good control, there was no difference between PAH SDS (–1.7) and FAH SDS (–1.5) (p value = 0.37). In patients with poor control (over- or under-treated) FAH SDS (–2.1) was significantly lower than PAH SDS (–1.4) (p value < 0.001).
Conclusion: The B&P method was able to accurately predict FAH in children with classic CAH, who were medically well controlled (based on 17-hydroxyprogesterone levels), but overestimated it by a significant 0.7 SD in poorly-controlled patients.
Abstract
Introduction: The final adult height (FAH) of patients with congenital adrenal hyperplasia (CAH) is often lower than the predicted adult height (PAH) using the Bayley-Pinneau (B&P) method. The aim of the current work was to test the validity of B&P in predicting FAH from a bone age (BA) measurement performed at onset of puberty.
Material and ethods: This was a retrospective longitudinal observational convenience single-centre study. The study included 54 patients (male and female) with classic CAH, whether salt-wasting (SW) or simple virilising (SV), who had reached FAH. The results of auxological measurements and hormonal data around the time of puberty were retrieved from files. Predicted adult height (PAH) was calculated from a BA taken at onset of puberty and compared with FAH.
Results: The median PAH SDS at the onset of puberty (–1.5) was significantly greater than the median FAH SDS (–2.2) (p < 0.001). The median target height SDS (–0.8) was significantly higher than the median FAH SDS (–2.2) (p < 0.001). FAH and FAH SDS were significantly worse in females (150.36 ± 7.23; –2.05 ± 1.13) than in their male counterparts (162.86 ± 3.30; –1.53 ± 0.51) (p value < 0.001; 0.048). In patients with good control, there was no difference between PAH SDS (–1.7) and FAH SDS (–1.5) (p value = 0.37). In patients with poor control (over- or under-treated) FAH SDS (–2.1) was significantly lower than PAH SDS (–1.4) (p value < 0.001).
Conclusion: The B&P method was able to accurately predict FAH in children with classic CAH, who were medically well controlled (based on 17-hydroxyprogesterone levels), but overestimated it by a significant 0.7 SD in poorly-controlled patients.
Keywords
classic congenital adrenal hyperplasia; Bayley-Pinneau method; predicted adult height; final adult height; bone age
About this articleTitle
The validity of the Bayley-Pinneau method in predicting final adult height at the onset of puberty in patients with classic congenital adrenal hyperplasia
Journal
Issue
Article type
Original paper
Pages
301-307
Published online
2021-04-13
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1576
Article views/downloads
641
DOI
Pubmed
Bibliographic record
Endokrynol Pol 2021;72(4):301-307.
Keywords
classic congenital adrenal hyperplasia
Bayley-Pinneau method
predicted adult height
final adult height
bone age
Authors
Nora Badawi
Lubna Fawaz
Ahmed Amin
Abdelkarim Kamel
Noha Arafa
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