Prospective risk of stillbirth according to fetal size at term

Umber Agarwal; Oliver Hugh; Jason Gardosi

doi:10.1515/jpm-2022-0449

Article Publicly Available

Prospective risk of stillbirth according to fetal size at term

This erratum corrects the original online version which can be found here: https://doi.org/10.1515/jpm-2022-0200

Umber Agarwal , Oliver Hugh and Jason Gardosi

Published/Copyright: October 10, 2022

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From the journal Journal of Perinatal Medicine Volume 50 Issue 9

Keywords: small for gestational age; SGA; stillbirth risk

Corrigendum to: Agarwal U, Hugh O, Gardosi J. Prospective risk of stillbirth according to fetal size at term. Journal of Perinatal Medicine 2022; volume 50, Issue 6, pp. 748–752 (DOI: https://doi.org/10.1515/jpm-2022-0200).

There was an arithmetic error listing 27,000 fewer cases in the denominator of the 3–10 centile band of the SGA analysis. This affected the calculated stillbirth rates and risk ratios within this centile band.

The changes are listed below, with correct values in bold and also highlighted in Tables 1 and 2 in bold. Figure 1A is also corrected.

In Table 1, the value for SGA 3<10 was corrected from 144,814 to 171,814, and the associated percentage SGA from 6.9 to 8.2%
In Table 2, the 37 week value for the <10 centile band was similarly changed from 144,814 to 171,814, and the values for the ongoing pregnancies at 38, 39, 40 and 41+ weeks gestation were corrected accordingly. The corresponding values for stillbirth risk and risk ratio are also corrected.
In Figure 1A, the 3<10 centile band and graph was changed according to the corresponding values in Table 2.
In the Results section, the SGA (<10 centile) rate is stated as 10%. It should instead state 11.3%, according to the sum of the corrected SGA 3<10 and SGA <3 rows in Table 1.
The Results also incorrectly state the 3 < 10 centile band rising “from 0.72 to 2.43”. It should instead read as rising “from 0.61 to 2.43”.
In the Abstract, the 3<10 centile band risk is incorrectly stated as rising “from 0.72 to 2.43 over the same period, with RR increasing from 2.5 to 8.4”. This should instead read “rising from 0.61 to 2.43 over the same period, with RR increasing from 2.1 to 8.4”.

Table 1:

Descriptives (n=2,094,702 deliveries >37.0 weeks). Birthweight section, corrected values in bold

	n	%	Mean	SD	Median	IQR
Birthweight, g			3424.1	482.8	3425.0	650.0
LGA >97th	111,283	5.3
LGA 90<97	59,678	2.8
SGA 3<10	171,814	8.2
SGA <3	65,307	3.1

SD, standard deviation; IQR, interquartile range; SGA, small for gestational age; LGA, large for gestational age

Table 2:

Prospective stillbirth risk and risk ratios by size and gestational age at term (n=2,094,702). Corrected values in bold.

Centile band		Current week of gestation
Centile band		37	38	39	40	41+
>97	Ongoing pregnancies, n	59,678	52,177	38,626	16,914	6,101
	Stillbirths, n	48	48	27	25	13
	Stillbirth risk^a	0.80	0.92	0.70	1.48	2.13
	Risk ratio^b	2.8	3.2	2.4	5.1	7.3
97 > 90	Ongoing pregnancies, n	111,283	102,344	81,564	42,536	15,979
	Stillbirths, n	45	67	62	46	24
	Stillbirth risk^a	0.40	0.65	0.76	1.08	1.50
	Risk ratio^b	1.4	2.3	2.6	3.7	5.2
10–90	Ongoing pregnancies, n	1,686,620	1,557,739	1,297,207	790,705	317,996
	Stillbirths, n	490	733	904	790	441
	Stillbirth risk^a	0.29	0.47	0.70	1.00	1.39
	Risk ratio^b	1.0	1.6	2.4	3.4	4.8
3 < 10	Ongoing pregnancies, n	171,814	145,018	113,574	69,516	27,992
	Stillbirths, n	104	93	134	98	68
	Stillbirth risk^a	0.61	0.64	1.18	1.41	2.43
	Risk ratio^b	2.1	2.2	4.1	4.9	8.4
<3	Ongoing pregnancies, n	65,307	46,884	33,416	19,764	8,114
	Stillbirths, n	106	97	85	72	50
	Stillbirth risk^a	1.62	2.07	2.54	3.64	6.16
	Risk ratio^b	5.6	7.1	8.8	12.5	21.2

^aPer 1,000 births; ^breference for risk ratio: stillbirth risk for 10–90 centile fetus at 37 weeks.

Figure 1A:

Prospective risk of stillbirth. Appropriate for gestational age (AGA, 10–90 centile) is compared with small for gestational age (SGA; 3<10 and <3) centile bands. Corrected values in 3<10 centile band and graph.

All changes relate to this error in the denominator of the 3<10 centile band. Their corrections do not affect any other results, discussion or conclusions of the study.

Corresponding author: Professor Jason Gardosi, Perinatal Institute, Birmingham, B15 3BU, UK, E-mail: jgardosi@perinatal.org.uk

Published Online: 2022-10-10

Published in Print: 2022-11-25

Articles in the same Issue

https://doi.org/10.1515/jpm-2022-0449

Keywords for this article

small for gestational age; SGA; stillbirth risk