Vitamin D deficiency during pregnancy in Turkey and the effect of the sunlight: a systematic review and meta-analysis

Burkay Yakar,Mehmet Onur Kaya

doi:10.1515/tjb-2020-0059

Abstract

Abstract Objectives vitamin D deficiency is a common and important problem during pregnancy. vitamin D deficiency in pregnancy can cause serious health problems for both mother and fetus. The aim of this study was to systematically review the literature for studies that assessed vitamin D status during pregnancy in the Turkey and affects of the sunlight on Vitamin D deficiency. Methods We conducted a systematic review and meta-analysis focused on vitamin D deficiency among pregnancy. PubMed, Scopus, Web of Science and Turkey citation index databases were searched between January 2010 and October 2019 was undertaken using keywords for ‘Vitamin D deficiency’ and ‘Pregnancy’ and ‘Turkey’ with English language restrictions imposed. Results A total of 66 studies were identified; 14 were included in the review. The prevalence of vitamin D deficiency in pregnancy was 83%, including all studies regardless of time in Turkey. When evaluated seasonal period, the prevalence of vitamin D deficiency was 73% in pregnant women in the sunny period, while it was 90% in the less sunny period. Conclusions The prevalence of vitamin D deficiency is high in pregnancy and is a major public health problem in Turkey. Turkey specific strategies should be developed for reducing vitamin D deficiency prevalence by investigation of risk factors and protective factors of vitamin D deficiency.

Highlights

Objectives: vitamin D deficiency is a common and important problem during pregnancy. vitamin D deficiency in pregnancy can cause serious health problems for both mother and fetus
The prevalence of vitamin D deficiency is high in pregnancy and is a major public health problem in Turkey
We evaluated all studies independently of time to establish the prevalence of Vitamin D (Vit-D) deficiency during pregnancy in Turkey

Summary

Introduction

Objectives: vitamin D deficiency is a common and important problem during pregnancy. vitamin D deficiency in pregnancy can cause serious health problems for both mother and fetus. Objectives: vitamin D deficiency is a common and important problem during pregnancy. Vitamin D deficiency in pregnancy can cause serious health problems for both mother and fetus. The aim of this study was to systematically review the literature for studies that assessed vitamin D status during pregnancy in the Turkey and affects of the sunlight on Vitamin D deficiency. Methods: We conducted a systematic review and metaanalysis focused on vitamin D deficiency among pregnancy. The prevalence of vitamin D deficiency in pregnancy was 83%, including all studies regardless of time in Turkey. The prevalence of vitamin D deficiency was 73% in pregnant women in the sunny period, while it was 90% in the less sunny period. Conclusions: The prevalence of vitamin D deficiency is high in pregnancy and is a major public health problem in Turkey. Turkey specific strategies should be developed for reducing vitamin D deficiency prevalence by investigation of risk factors and protective factors of vitamin D deficiency

Objectives

Methods

Findings

Discussion

Conclusion