Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Clinical epidemiology of skeletal dysplasias in South America

Full text
Author(s):
Barbosa-Buck, Cecilia O. [1] ; Orioli, Ieda M. [2, 3] ; Dutra, Maria da Graca [2, 4] ; Lopez-Camelo, Jorge [2, 5] ; Castilla, Eduardo E. [2, 4, 5] ; Cavalcanti, Denise P. [1]
Total Authors: 6
Affiliation:
[1] Univ Estadual Campinas UNICAMP, Dept Med Genet, Fac Ciencias Med, Sao Paulo - Brazil
[2] INAGEMP, Rio De Janeiro - Brazil
[3] Univ Fed Rio de Janeiro, ECLAMC, Dept Genet, Inst Biol, Rio De Janeiro - Brazil
[4] Inst Oswaldo Cruz, Lab Epidemiol Malformacoes Congenitas, ECLAMC, Sao Paulo - Brazil
[5] CEMIC, ECLAMC, Buenos Aires, DF - Argentina
Total Affiliations: 5
Document type: Journal article
Source: AMERICAN JOURNAL OF MEDICAL GENETICS PART A; v. 158A, n. 5, p. 1038-1045, MAY 2012.
Web of Science Citations: 22
Abstract

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: 2.93.5). 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: OI0.74 (0.610.89); thanatophoric dysplasia0.47 (0.360.59); and achondroplasia0.44 (0.330.55). 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. (c) 2012 Wiley Periodicals, Inc. (AU)