After adjusting for age, gender, ethnicity, ideal physical activity, hay fever, and asthma, compared with the reference group (vitamin B 12 with second quartile), the OR for eczema was 0.566 (95% CI: 0.321–1.028, marginal significance) for the first quartile of vitamin B 12.
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Associations of single and multiple vitamin exposure with childhood eczema: data from the national health and nutrition examination survey.
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