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Iranian Journal of Pediatrics
Tehran University of Medical Sciences Press
ISSN: 1018-4406
EISSN: 2008-2150
Vol. 24, No. 6, 2014, pp. 665-672
Bioline Code: pe14111
Full paper language: English
Document type: Review Article
Document available free of charge

Iranian Journal of Pediatrics, Vol. 24, No. 6, 2014, pp. 665-672

 en Congenital Hypothyroidism Screening Program in Iran; a Systematic Review and Metaanalysis
Veisani, Yousef; Sayehmiri, Kourosh; Rezaeian, Shahab & Delpisheh, Ali

Abstract

Objective: Unrecognized congenital hypothyroidism (CH) leads to mental retardation. Newborn screening and thyroid therapy started within 2 weeks of age can normalize cognitive development. In this systematic review, the local results of the national CH screening program in different provinces in Iran are reviewed and evaluated.
Methods: Literature on the CH screening, the national databases including SID, Medlib, Iran Medex, Magiran as well as international databases including PubMed/Medline, ISI Web of Knowledge and web of science, EMBASE, SCOPUS and Google Scholar. Appraisal was guided by a checklist assessing clarity of aims and research questions. The 95% confidence intervals were calculated by I-square models. Meta regression was introduced to explore the heterogeneity between studies.
Findings: We identified 25 samples including 1425124 neonates in our country. Data were Meta analyzed using random-effects models, and we found a TSH levels of 19633 babies in the first sampling were greater than the cut-off level (TSH ≥5mIU/L). The pooled recall rate was 0.014 (95 % CI: 0.013 – 0.015). According to Meta analysis the overall incidence of CH was 2/1000 (95% CI: .002 – .002). The incidence of CH did not appear to be increasing over time (P=0.08).
Conclusion: Considering TSH ≥5mIU/L as a cut-off point for recalling neonates and low positive predictive value (14%) of this point shows that more investigation and research is needed for establishing accurate level of TSH as a criterion for recalling patients.

Keywords
Congenital Hypothyroidism; Hypothyroidism; Congenital; Meta Regression; Iran

 
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