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Influence of Maternal Prenatal Vitamin D Status on Infant Oral Health

Influence of Maternal Prenatal Vitamin D Status on Infant Oral Health

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T test analyses were undertaken to assess the relati<strong>on</strong>ship between the number <str<strong>on</strong>g>of</str<strong>on</strong>g><br />

decayed teeth (d) score and various 25(OH)D threshold levels. There was no significant<br />

difference in the mean number <str<strong>on</strong>g>of</str<strong>on</strong>g> primary teeth with decay am<strong>on</strong>g infants <str<strong>on</strong>g>of</str<strong>on</strong>g> mothers<br />

who had c<strong>on</strong>centrati<strong>on</strong>s ≤ 35 nmol/L and > 35 nmol/L (Table 4.6). Similarly, there was<br />

no significant difference when the threshold <str<strong>on</strong>g>of</str<strong>on</strong>g> 40 nmol/L was selected. Interestingly,<br />

infants <str<strong>on</strong>g>of</str<strong>on</strong>g> mothers who had 25(OH)D levels ≥ 80 nmol/L had a statistically lower mean d<br />

score than those who had levels below this threshold (p=.032).<br />

Table 4.6 – Relati<strong>on</strong>ship between dt score and maternal 25(OH)D<br />

25(OH)D<br />

dt score<br />

N Mean ± S.D. Range P value<br />

25(OH)D Threshold – Deficiency<br />

.099<br />

> 35 nmol/L<br />

≤ 35nmol/L<br />

85<br />

47<br />

1.07 ± 1.95<br />

1.55 ± 2.24<br />

0 – 10<br />

0 – 9<br />

25(OH)D Threshold – Insufficiency<br />

> 40 nmol/L<br />

≤ 40 nmol/L<br />

25(OH)D Threshold - Adequacy<br />

≥ 80 nmol/L<br />

< 80 nmol/L<br />

73<br />

59<br />

17<br />

115<br />

*Aspin-Welch Unequal-Variance Test<br />

1.03 ± 1.99<br />

1.51 ± 2.14<br />

0.65 ± 1.22<br />

1.33 ± 2.15<br />

0 – 10<br />

0 – 9<br />

0 – 4<br />

0 – 10<br />

.092<br />

.032*<br />

A similar series <str<strong>on</strong>g>of</str<strong>on</strong>g> analyses was undertaken for the mean number <str<strong>on</strong>g>of</str<strong>on</strong>g> decayed<br />

tooth surfaces (ds) with these selected thresholds for 25(OH)D (Table 4.7). While mean<br />

ds values did not statistically differ between infants <str<strong>on</strong>g>of</str<strong>on</strong>g> mothers with levels > 35 nmol/L<br />

vs. ≤ 35 nmol/L and > 40 nmol/L vs. ≤ 40 nmol/L, they did significantly differ at the<br />

higher threshold <str<strong>on</strong>g>of</str<strong>on</strong>g> adequacy. <strong>Infant</strong>s <str<strong>on</strong>g>of</str<strong>on</strong>g> mothers who had c<strong>on</strong>centrati<strong>on</strong>s <str<strong>on</strong>g>of</str<strong>on</strong>g> 25(OH)D<br />

below 80 nmol/L had significantly higher ds scores than infants whose mothers had<br />

serum levels at or above this threshold (p=.028). These results seem to indicate that infant<br />

dental caries is associated with maternal 25(OH)D status.<br />

4-18

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