Table I.

Demographic traits and prenatal exposures, by cord blood 25(OH)D levels.

				Cord 25(OH)D level (nmol/L)
			<50	50–74.9	75–99.9	≥100.0
		N	%(n)	%(n)	%(n)	%(n)	P-value*
Total		219	26.5 (58)	41.1 (90)	21.5 (47)	11.0 (24)	-
Gender
	Male	107	30.8 (33)	43.0 (46)	16.8 (18)	9.3 (10)
	Female	112	22.3 (25)	39.4 (44)	25.9 (29)	12.5 (14)	0.24
Maternal Ethnicity
	Non-Hispanic White	168	20.2 (34)	42.3 (71)	23.8 (40)	13.7 (23)
	Hispanic	39	48.7 (19)	38.5 (15)	10.3 (4)	2.6 (1)
	Other/Unknown	12	41.7 (5)	33.3 (4)	25.0 (3)	0.0 (0)	0.004
Household Income
	< $25,000	28	50.0 (14)	35.7 (10)	10.7 (3)	3.4 (1)
	$25,000–45,000	50	18.0 (9)	44.0 (22)	22.0 (11)	16.0 (8)
	> $45,000	127	22.8 (29)	43.3 (55)	24.4 (31)	9.4 (12)	0.06
Maternal Atopy
	No	70	32.9 (23)	37.1 (26)	20.0 (14)	10.0 (7)
	Yes	143	23.8 (34)	44.1 (63)	23.1 (33)	9.1 (13)	0.52
Maternal Asthma
	No	169	26.6 (45)	43.8 (74)	19.5 (33)	10.1 (17)
	Yes	43	25.6 (11)	30.2 (13)	27.9 (12)	16.3 (7)	0.25
Birth Season
	Nov – Apr	93	31.2 (29)	46.2 (43)	18.3 (17)	4.3 (4)
	May – Oct	126	23.0 (29)	37.3 (47)	23.8 (30)	15.9 (20)	0.02
Househod smoking
	No	176	23.9 (42)	41.5 (73)	21.6 (38)	13.1 (23)
	Yes	43	37.2 (16)	39.5 (17)	20.9 (9)	2.3 (1)	0.10
Maternal age (years)
	mean (sd)	219	28.7 (6.2)	29.5 (6.4)	30.7 (5.8)	29.8 (6.5)	0.42
Maternal education (years)
	mean (sd)	219	14.8 (2.7)	15.7 (2.7)	16.0 (2.5)	15.5 (1.4)	0.08

^*P-values from Fisher's exact tests and one-way ANOVA (for maternal age and education).