4.

孕晚期妇女VitA水平与VitA-PTR的Spearman相关

Spearman correlation analysis between maternal VitA level and VitA-PTR

Items	${r_{\mathrm{s}}}^{\mathrm{a}}$	P	${{r_{\mathrm{sadj}}}_{}}^{\mathrm{b}}$	P
a, rs denotes Spearman correlation coefficient; b, rsadj denotes Spearman correlation coefficient adjusted by multi-variables, including maternal age, body mass index at enrollment, hemoglobin level, county, occupation, education, gestational age at delivery and neonatal gender.; c, first definition method was defined according to method for vitamin A deficiency screening (WS/T 553—2017) for children at or younger than 6 years; d, second definition method was defined as values of cord blood plasma retinol concentration below the 10th percentile. VitA, vitamin A; VitA-PTR, VitA placental transport ratio.
Maternal VitA nutritional status
VitA deficiency	-0.08	0.65	-0.03	0.91
Marginal VitA deficiency	-0.48	<0.001	-0.48	<0.001
Sufficient	-0.62	<0.001	-0.61	<0.001
Neonatal VitA nutritional status
First definition methodc
Marginal VitA deficiency	-0.95	<0.001	-0.94	<0.001
Sufficient	-0.91	<0.001	-0.90	<0.001
Second definition methodd
Relative VitA deficiency	-0.95	<0.001	-0.94	<0.001
Sufficient	-0.88	<0.001	-0.86	<0.001
Total	-0.84	<0.001	-0.82	<0.001