Table 2.

Characteristics of participants in the Baby VIP study (n = 362) according to whether babies were followed up by home visits to measure PWV after hospital recruitment

	With PWV measurements			Without PWV measurements			pa
	total n	mean ± SD/n (%)/median	95% CI/IQR	total n	mean ± SD/n (%)/median	95% CI/IQR
Gestational age, days	284	277 ± 14		78	276.3 ± 14		0.5
Birth weight, g	284	3,339 ± 636		78	3,293 ± 621		0.6
Maternal age at antenatal booking, years	284	31.1 ± 5.5		78	28.6 ± 6.0		0.0007
Maternal BMI at antenatal booking	281	26.5 ± 6.1		77	25.3 ± 4.9		0.1
IMD	284	28.6 ± 19.1		78	32.7 ± 19.6		0.1
Maternal Hb at ≤20 weeks’ gestation, g/dl	263	12.6 ± 1.0		66	12.4 ± 1.2		0.1
Maternal Hb at >20 weeks’ gestation, g/dl	266	11.6 ± 1.0		71	11.4 ± 1.1		0.2
First-trimester maternal sF, µg/l	273	33.4	17.4–61.6	75	28.6	13.1–68.7	0.5
First-trimester maternal sTfR, nmol/l	273	13.1	10.4–16.1	75	12.3	10.1–16.1	0.6
First-trimester maternal R/F ratio, µg/l	273	27.5	15.3–61.9	75	32.0	14.0–72.9	0.6
Primiparous	284	144 (51)	45, 57	78	29 (37)	27, 49	0.03
Male baby	284	137 (48)	42, 54	78	45 (58)	47, 69	0.1
Maternal White ethnicity	284	220 (78)	72, 82	78	68 (87)	78, 94	0.1
Maternal smoking at antenatal booking	278	36 (13)	9, 18	76	13 (17)	9, 28	0.5
Gestational diabetes	284	5 (2)	1, 4	78	1 (1)	0, 7	0.1
Pre-eclampsia	284	3 (1.1)	0,3.1	78	3 (3.9)	1.0, 10.8	0.1
Anaemia at ≤20 weeks’ gestation (<11 g/dl)	263	10 (4)	2, 7	66	6 (9)	3, 19	0.1
Anaemia at >20 weeks’ gestation (<10.5 g/dl)	266	35 (13.2)	9.3, 1.8	71	13 (18.3)	10.1, 29.3	0.3
Had taken iron supplements in pregnancy	284	92 (32)	27, 38	77	29 (38)	27, 49	0.4
Had taken multivitamin supplements in pregnancy	284	157 (55)	49, 61	77	32 (42)	30, 53	0.03

^aIndependent samples t test or Mann-Whitney test for continuous variables, and χ² test for categorical variables.