. Author manuscript; available in PMC: 2015 Jul 1.

Published in final edited form as: Int J Gynaecol Obstet. 2014 Apr 3;126(1):78–82. doi: 10.1016/j.ijgo.2014.01.016

Table 2.

Estimated fetal weight and umbilical resistance index stratified by gestational age and concurrent Plasmodium falciparum malaria at prenatal care visit, 2006–2009

Gestational age at measurement, wk	Concurrent malaria^b	Estimated fetal weight^a			Umbilical resistance index

		Mean, g^c	Mean difference (95% confidence interval)^c	P value	Mean, g^c	Mean difference (95% confidence interval)^c	P value
18–20
	Present (n=6)	279	−36 (−86 to 15)	0.16	0.82	0.042 (0.0098–0.74)	0.01
	Absent (n=45)	314			0.78
21–23
	Present (n=8)	542	16 (−43 to 77)	0.58	0.78	0.025 (−0.044 to 0.093)	0.5
	Absent (n=85)	514			0.75
24–26
	Present (n=16)	786	−22 (−84 to 38)	0.46	0.75	0.031 (−0.0016 to 0.064)	0.06
	Absent (n=118)	832			0.72
27–29
	Present (n=25)	1188	−31 (−94 to 33)	0.30	0.70	0.012 (−0.017 to 0.042)	0.4
	Absent (n=160)	1220			0.69
30–32
	Present (n=12)	1683	−123 (−235 to – 12)	0.03	0.67	0.015 (−0.022 to 0.053)	0.4
	Absent (n=121)	1808			0.66
33–35
	Present (n=7)	2334	−13 (−171 to 144)	0.87	0.68	0.029 (−0.022 to 0.081)	0.4
	Absent (n=73)	2356			0.66

Hadlock formula for estimation of fetal weight [25].

P. falciparum malaria at prenatal care.

Estimated mean and mean differences, adjusted for primigravida status.