El, ÇiğdemÇelikkaya, Mehmet Emin2020-07-282020-07-282019El, C., & Celikkaya, M. E. (2019). Is there a predictive association between vitamin D concentrations and lower respiratory tract infections in infants?. Journal of Turgut Ozal Medical Center, 26(1).2636-7688https://dx.doi.org/10.5455/annalsmedres.2018.12.298https://hdl.handle.net/20.500.12483/2949Aim: Vitamin D deficiency have been estimated to be endemic in the worldwide and in each age group and also it is reported that vitamin D has important effects on both natural and acquired immunity and there may be a relationship between deficiency and predisposition to infections The aim of this study is to investigate whether serum vitamin D level are effective in infant lower respiratory tract infection which is one of the most mortal infectious diseases in worldwide. Material and Methods: In our study, between October 2016 and January 2018 in Department of Pediatrics, the data of 418 infants with LRTI and their ages ranging from 5 to 24 months and were examined retrospectively. Vitamin D levels were studied in 106 of this patients. Results: In group-1, the mean duration of vitamin D supplementation was 4.9 months, while the mean in group-2 was 8.6 months. Breastfeeding time was 3.27 months in group 1 while it was 5.71 months in group 2. Both the duration of breastfeeding and the duration of vitamin D supplementation were shorter in group 1 than in group 2.Those difference between the groups was in terms of statistically significant (p< 0.05) Conclusion: Vitamin D deficiency in infants may be associated with LRTI, and even vitamin D deficiency may be a predisposing factor for severe LRTIs and also the frequency and severity of LRTIs can be reduced with optimal serum levels of vitamin D.eninfo:eu-repo/semantics/openAccessAttribution-NonCommercial-NoDerivs 3.0 United StatesInfantLRTIVitamin DArticle26228929210.5455/annalsmedres.2018.12.298315790