How to Cite this Article: Barbosa-Buck CO, Orioli IM, Dutra MG, Lopez-Camelo J, Castilla EE, Cavalcanti DP. 2012. Clinical epidemiology of skeletal dysplasias in South America. Am J Med Genet Part A. 158A:1038–1045.
Clinical epidemiology of skeletal dysplasias in South America†
Article first published online: 9 MAR 2012
Copyright © 2012 Wiley Periodicals, Inc.
American Journal of Medical Genetics Part A
Volume 158A, Issue 5, pages 1038–1045, May 2012
How to Cite
Barbosa-Buck, C. O., Orioli, I. M., da Graça Dutra, M., Lopez-Camelo, J., Castilla, E. E. and Cavalcanti, D. P. (2012), Clinical epidemiology of skeletal dysplasias in South America. Am. J. Med. Genet., 158A: 1038–1045. doi: 10.1002/ajmg.a.35246
- Issue published online: 18 APR 2012
- Article first published online: 9 MAR 2012
- Manuscript Accepted: 23 DEC 2012
- Manuscript Received: 17 AUG 2011
- MCT/CNPq, Brazil. Grant Numbers: 573993/2008-4, 476978/2008-4, 554755/2009-2, 306750/2009-0
- INAGEMP. Grant Number: 402045/2010-6
- FAPERJ, Brazil. Grant Numbers: E-26/102.748/2008, E-26/170.007/2008
- CAPES, Brazil. Grant Numbers: 1957/2009, 2799/2010
- FAPESP, Brazil. Grant Number: 98/16006-6
- CAPES, Brazil. Grant Number: 0603-08-2
- CNPq, Brazil. Grant Number: 402008/2010-3
- thanatophoric dysplasia;
- osteogenesis imperfecta
Currently accepted birth prevalence for osteochondrodysplasias (OCD) of about 2/10,000 is based on few studies from small series of cases. We conducted a study based on more than 1.5 million births. OCD cases were detected from 1,544,496 births occurring and examined in 132 hospitals of ECLAMC (Latin American Collaborative Study of Congenital Malformations) between 2000 and 2007. Cases were detected and registered according to a pre-established protocol, and then ranked in four diagnostic evidence levels (DEL), according to available documentation. For the analysis of risk factors, a healthy control sample born in the same period was used. OCD was diagnosed in 492 newborns, resulting in a prevalence per 10,000 of 3.2 (95% CI: 2.9–3.5). Perinatal lethality (stillbirths plus early neonatal deaths) occurred in 50% of cases. Prenatal ultrasound diagnosis was made in 73% of cases (n = 359). Among 211 cases from the best documented group (DEL-1) and according to international classification, 33% of cases fit into the G-25 (osteogenesis imperfecta), 29% in Group-1 (FGFR3), and 8% in Group-18 (Bent bones). The prevalence of the main OCD types were: OI—0.74 (0.61–0.89); thanatophoric dysplasia—0.47 (0.36–0.59); and achondroplasia—0.44 (0.33–0.55). Paternal age (31.2 ± 8.5), parity (2.6), and parental consanguinity rate (5.4%) were higher in cases than in controls (P < 0.001). In conclusion, the OCD overall prevalence of 3.2 per 10,000 found seems to be more realistic than previous estimates. This study also confirmed the high perinatal mortality, and the association with high paternal age, parity, and parental consanguinity rate. © 2012 Wiley Periodicals, Inc.