ArticleJournal of clinical research in pediatric endocrinology2015
Factors Influencing Serum Vitamin D Concentration in Turkish Children Residing in İzmir: A Single-Center Experience.
Article in Journal of clinical research in pediatric endocrinology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
4 citing papers in PubMed, 1 synthesis or guideline pooled it, 14 citations in OpenAlex.
- Adherence to vitamin D supplementation guidelines in children under five years of age: a systematic literature review.European journal of nutrition · 2024Pooled it
- A review of vitamin D deficiency and vitamin D receptor polymorphisms in endocrine-related disorders.Clinical and experimental pediatrics · 2025Article
- Vitamin D sufficiency in young Brazilian children: associated factors and relationship with vitamin A corrected for inflammatory status.Public health nutrition · 2020Article
- Are Vitamin D Drops Containing 400 IU Daily Adequate for Preventing Vitamin D Deficiency?Journal of clinical research in pediatric endocrinology · 2016Article
Corrections and comments
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveThe aim of this study was to examine the vitamin D status of children and to determine the factors influencing serum 25-hydroxyvitamin D [25(OH)D] concentration in Turkish infants living in İzmir.
methodsIn this study, we examined the serum 25(OH)D levels of 100 infants aged 1 to 24 months and of 22 mothers from İzmir, Turkey. The study also included a questionnaire given to the mothers to acquire data on the demographic characteristics of the infants and their mothers as well as information on vitamin D supplementation, clothing habits, and sunlight exposure.
resultsVitamin D deficiency was present in 31% of infants and 81.8% of mothers. Twenty-four male (42.9%) and 7 female (15.9%) infants were found to be vitamin D deficient (<20 mg/dL); 9 male (16.1%) and 17 female (38.6%) infants to be vitamin D insufficient (20-30 mg/dL); and 23 male (41.1%) and 20 female (45.5%) infants were vitamin D sufficient (>30 mg/dL). Only 63% of the infants were receiving vitamin D supplementation and 52% were said to be having regular exposure to sunlight. Mean serum vitamin D levels were lower in infants whose mothers were dressed according to the culture of traditional covered clothing (44%) compared to those infants whose mothers' dressing style provided more exposure to sunlight.
conclusionWe conclude that low exposure to sunlight, inadequate use of vitamin D supplementation, and large family size are factors influencing the vitamin D status of Turkish children living in the inner city of İzmir.
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Registered trials
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