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A new study of 5 year old children relates their current allergy symptoms to LOW maternal intake of vitamin D from food (which is strange within the context of current cohort studies that show a INCREASED risk by vitamin D supplement use).<\/p>\nA new study of 5 year old children relates their current allergy symptoms to LOW maternal intake of vitamin D from food (which is strange within the context of current cohort studies that show a INCREASED risk by vitamin D supplement use).<\/p>\n
As this is a diabetes study, the sample is highly biased (a 15% subset of the population is HLA-DQB1 02\/0302 heterozygous and DQB1 0302\/x positive). 7% of the original selected individuals participate in a follow up while another 1-2% are lost there due to insufficient data. So is this sample representative to allow any conclusion?<\/p>\n
Second, the authors find effects with dietary vitamin D which is usually less than 10% of the overall source. So is this study really about vitamin D? As the authors do not find any direct effect by vitamin D supplements, this study may be just about fish eating<\/a> which increases 3,4fold between “vitamin D exposure” groups (together with other factors like socioeconomic status).<\/p>\n Third, there is no information about vitamin D supplementation in the newborn period – the most relevant question at the moment. The authors omit this from the analysis (and even from the discussion which disqualifies the paper).<\/p>\n … We lack knowledge on the mechanisms by which vitamin D [works].<\/p><\/blockquote>\n I agree, this is another example, how dangerous it is to misuse studies for unintended outcomes and to reason from insufficient data. BTW Why are there only three quartile<\/strong> groups in the figure?<\/p>\n\n <\/p>\n A new study of 5 year old children relates their current allergy symptoms to LOW maternal intake of vitamin D from food (which is strange within the context of current cohort studies that show a INCREASED risk by vitamin D supplement use). As this is a diabetes study, the sample is highly biased CC-BY-NC … Continue reading Neverending story – vitamin D in pregnancy<\/span> \n CC-BY-NC Science Surf , accessed 07.04.2026<\/span>\n <\/div>","protected":false},"excerpt":{"rendered":"