Plasma Vitamin D Deficiency Is Associated With Poor Sleep Quality and Night-Time Eating at Mid-Pregnancy in Singapore.

To our best knowledge, only one study was conducted among pregnant women, but the sample size was modest ( n = 87), and their result showing poorer sleep quality in 25OHD deficient women versus non-deficient women did not reach statistical significance [ 21 ].

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When adjusted for confounders, similar findings were found for 25OHD deficiency, although the association of 25OHD deficiency with pNT eating was near to statistical significance.

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