This meta-analysis examined the relationship between vitamin D intake and risk of type 1 diabetes. The analysis identified 11 observational studies, including 8 studies on vitamin D supplementation during early life and 3 on maternal vitamin D intake during pregnancy. The meta-analysis found that vitamin D supplementation during early life was associated with a 29% reduced risk of type 1 diabetes. However, the analysis found no clear association between maternal vitamin D intake during pregnancy and risk of type 1 diabetes in offspring.

1. 摄入维生素D和1型糖尿病的风险：对观察性研究的荟萃分析。
摘要
维生素D据称对1型糖尿病有保护作用。然而，观察性研究的结果并不一致。我们通过对观察性研究进行荟萃分析来检查这两者
之间的关联。通过于2013年6月搜索多个数据库查找包括病例对照和队列研究在内的相关研究。使用固定或随机效应模型来计算
汇总风险估计。我们明确了早年摄入维生素D的八项研究（两项队列研究和六项病例对照研究），以及妊娠期母体摄入维生素D
的三项研究（两项队列研究和一项病例对照研究）。早年补充维生素D补充与不补充维生素D的1型糖尿病合并比值比为0.71（95
％置信区间[CI]，0.51-0.98）。病例对照亚组分析中也呈现类似结果，但队列亚组分析并未显示此结果。妊娠期母体摄入维生素
D的合并比值比为0.95（95％CI，0.66-1.36）。综上所述，早年摄入维生素D可能与降低1型糖尿病风险相关。然而，并没有足够
的证据表明母体摄入维生素D与胎儿1型糖尿病风险之间的联系。
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我们是医学图书馆馆员，我们正在进行一项探索非英语医学研究文章全球知名度的实验。
本摘要的翻译由经认证的翻译人员完成。完整开放获取文章的PubMed引用和链接可在这里
找到https://www.ncbi.nlm.nih.gov/pubmed/24036529。 请在下面输入您对本项
目及译文质量的意见（如果您是母语人士）。
- 科罗拉多大学健康科学图书馆，Lilian Hoffecker 和 Dana Abbey。

2. Vitamin D intake and risk of type 1 diabetes: a meta-analysis of observational studies.
Abstract
Vitamin D is suggested to have protective effects against type 1 diabetes. However, the results from observational studies have been inconsistent.
We aimed to examine their association by conducting a meta-analysis of observational studies. Multiple databases were searched in June 2013 to
identify relevant studies including both case-control and cohort studies. Either a fixed- or random-effects model was used to calculate the pooled
risk estimate. We identified eight studies (two cohort studies and six case-control studies) on vitamin D intake during early life and three studies
(two cohort studies and one case-control study) on maternal vitamin D intake during pregnancy. The pooled odds ratio for type 1 diabetes
comparing vitamin D supplementation with non-supplementation during early life was 0.71 (95% confidence interval [CI], 0.51-0.98). Similar
results were observed in the case-control subgroup analysis but not in the cohort subgroup analysis. The pooled odds ratio with maternal intake
of vitamin D during pregnancy was 0.95 (95% CI, 0.66-1.36). In conclusion, vitamin D intake during early life may be associated with a reduced risk
of type 1 diabetes. However, there was not enough evidence for an association between maternal intake of vitamin D and risk of type 1 diabetes
in the offspring.
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We are medical librarians conducting an experiment to understand the global visibility of non-English medical research articles. The translation
for this abstract was performed by a certified translator. The PubMed citation and link to the whole open access article can be found here
https://www.ncbi.nlm.nih.gov/pubmed/24036529. Please feel free to add your comments below on the project and, if you are a native-speaker,
on the quality of the translation.
--Lilian Hoffecker and Dana Abbey, Health Sciences Library, University of Colorado.