Correction: Santa-Marina et al. Maternal Ferritin Levels during Pregnancy and ADHD Symptoms in 4-Year-Old Children: Results from the INMA-INfancia y Medio Ambiente (Environment and Childhood) Prospective Birth Cohort Study. Int. J. Environ. Res. Public Health 2020, 17, 7704

Santa-Marina, Loreto; Lertxundi, Nerea; Andiarena, Ainara; Irizar, Amaia; Sunyer, Jordi; Molinuevo, Amaia; Llop, Sabrina; Julvez, Jordi; Beneito, Andrea; Ibarluzea, Jesús; Imaz, Liher; Ferrin, Maite

doi:10.3390/ijerph18126283

Open AccessCorrection

Correction: Santa-Marina et al. Maternal Ferritin Levels during Pregnancy and ADHD Symptoms in 4-Year-Old Children: Results from the INMA-INfancia y Medio Ambiente (Environment and Childhood) Prospective Birth Cohort Study. Int. J. Environ. Res. Public Health 2020, 17, 7704

by

Loreto Santa-Marina

^1,2,3,

Nerea Lertxundi

^2,4,

Ainara Andiarena

^2,4

,

Amaia Irizar

^1,2,5,*,

Jordi Sunyer

^1,6,7,

Amaia Molinuevo

¹

,

Sabrina Llop

^1,8,

Jordi Julvez

^1,7,9

,

Andrea Beneito

⁸

,

Jesús Ibarluzea

^1,2,3,4

,

Liher Imaz

^3,10

and

Maite Ferrin

^11,12

¹

Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, C/Monforte de Lemos 3–5, 28029 Madrid, Spain

²

Biodonostia, Epidemiology and Public Health Area, Environmental Epidemiology and Child Development Group, 20014 San Sebastian, Spain

³

Public Health Division of Gipuzkoa, Basque Government, 20013 San Sebastian, Spain

⁴

Faculty of Psychology, University of the Basque Country (UPV/EHU), Avenida Tolosa 70, 20018 San Sebastian, Spain

⁵

Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, 48940 Leioa, Spain

⁶

Hospital del Mar Research Institute, 08003 Barcelona, Spain

⁷

ISGlobal—Instituto de Salud Global de Barcelona–Campus MAR, PRBB, 08003 Barcelona, Spain

⁸

Epidemiology and Environmental Health Joint Research Unit, FISABIO–Universitat Jaume I–Universitat de València, 08003 València, Spain

⁹

Institut d’Investigació Sanitària Pere Virgili (IISPV), Hospital Universitari Sant Joan de Reus, 43204 Reus, Spain

¹⁰

Biodonostia, Epidemiology and Public Health Area, Epidemiology of Chronic and Communicable Diseases Group, 20014 San Sebastian, Spain

¹¹

Haringey Child and Adolescent Mental Health Service, Barnet, Enfield and Haringey NHS Mental Health Trust, London N15 3TH, UK

¹²

Recognition Health, London W1G 9RU, UK

Show full affiliation list

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^*

Author to whom correspondence should be addressed.

Int. J. Environ. Res. Public Health 2021, 18(12), 6283; https://doi.org/10.3390/ijerph18126283

Submission received: 27 May 2021 / Accepted: 2 June 2021 / Published: 10 June 2021

Download Versions Notes

1. Error in Table 3

In the original article [1], there was a mistake in Table 3 as published. The units displayed for ferritin (mg/L) are incorrect, with µg/L being the correct unit for that parameter. Values for ferritin levels are correct, and only the units are affected by this typographic mistake. Interpretation of the results are not affected, since it was carried out with the correct values and units from the analysis. The corrected version of Table 3 appears below:

Table 3. Zero-inflated Poisson regression models for the association between inattention, hyperactivity, and ADHD symptoms with ferritin levels (µg/L log scale) on a continuous scale and in tertiles.

		Tertile 1 [1.98, 20.92] (µg/L)	Tertile 2 (20.92, 38.79] (µg/L)	Tertile 3 (38.79, 216.5] (µg/L)	p for Trend **	Continuous
		Beta CI (95%)	Beta CI (95%)	Beta CI (95%)		Beta CI (95%)
Inattention
	Count model *¹
	Male ***	1 (Ref.)	−0.3 (−0.55, −0.05)	−0.37 (−0.6, −0.14)	0.002	−0.19 (−0.32, −0.07)
	Female ***	1 (Ref.)	−0.11 (−0.64, 0.42)	0.35 (−0.07, 0.77)	0.066	0.09 (−0.13, 0.31)
	Zero-inflation model *²	1 (Ref.)	0.19 (−0.24, 0.63)	0.19 (−0.24, 0.63)	0.488	−0.04 (−0.26, 0.19)
Hyperactivity
	Count model *¹	1 (Ref.)	−0.07 (−0.29, 0.16)	−0.11 (−0.33, 0.11)	0.327	−0.03 (−0.15, 0.09)
	Zero-inflation model *²	1 (Ref.)	0.24 (−0.16, 0.64)	0.17 (−0.23, 0.56)	0.411	0.11 (−0.11, 0.32)
ADHD
	Count model *¹	1 (Ref.)	−0.09 (−0.24, 0.06)	−0.09 (−0.23, 0.05)	0.239	−0.02 (−0.1, 0.05)
	Zero-inflation model *²	1 (Ref.)	0.36 (0, 0.71)	0.12 (−0.22, 0.47)	0.515	0.13 (−0.06, 0.33)

Models adjusted by cohort, smoking during pregnancy, alcohol intake during pregnancy, pre-pregnancy BMI, social class, sex and age of the child, living with mother/father, and weeks (week of sample collection). *¹ Count model coefficients (Poisson with log link). *² Zero-inflation model coefficients (binomial with logit link). ** p for the trend between tertiles. *** Model with interaction term between sex and ferritin. Significant associations (p < 0.05) are indicated in bold.

2. Error in Table 4

In the original article [1], there was a mistake in Table 4 as published. The units displayed for ferritin (mg/L) are incorrect, with µg/L being the correct unit for that parameter. Values for ferritin levels are correct, and only the units are affected by this typographic mistake. Interpretation of the results are not affected, since it was carried out with the correct values and units from the analysis. The corrected version of Table 4 appears below:

Table 4. Zero-inflated Poisson regression models for the association between inattention, hyperactivity, and ADHD symptoms with ferritin levels (log scale).

		Tertile 1 [1.98, 20.92] (µg/L)	Tertile 2 (20.92, 38.79] (µg/L)	Tertile 3 (38.79, 216.5] (µg/L)	p for Trend **	Continuous
		Beta CI (95%)	Beta CI (95%)	Beta CI (95%)		Beta CI (95%)
stratified by Sex
Inattention
Boys	Count model *¹	1 (Ref.)	−0.32 (−0.57, −0.06)	−0.4 (−0.63, −0.16)	0.001	−0.21 (−0.34, −0.08)
	Zero-inflation model *²	1 (Ref.)	0.09 (−0.46, 0.63)	−0.27 (−0.8, 0.25)	0.270	−0.14 (−0.43, 0.15)
Girls	Count model *¹	1 (Ref.)	0.04 (−0.61, 0.69)	0.58 (0.02, 1.13)	0.012	0.15 (−0.09, 0.39)
	Zero-inflation model *²	1 (Ref.)	0.37 (−0.36, 1.09)	−0.32 (−1.13, 0.49)	0.311	−0.38 (−1.17, 0.42)
Hyperactivity
Boys	Count model *¹	1 (Ref.)	−0.09 (−0.37, 0.19)	−0.16 (−0.44, 0.11)	0.244	−0.03 (−0.18, 0.12)
	Zero-inflation model *²	1 (Ref.)	0.16 (−0.37, 0.68)	0 (−0.52, 0.51)	0.981	−0.03 (−0.32, 0.25)
Girls	Count model *¹	1 (Ref.)	−0.02 (−0.44, 0.39)	−0.07 (−0.49, 0.35)	0.727	−0.1 (−0.33, 0.13)
	Zero-inflation model *²	1 (Ref.)	0.41 (−0.22, 1.04)	0.48 (−0.16, 1.12)	0.143	0.34 (−0.02, 0.7)
ADHD
Boys	Count model *¹	1 (Ref.)	−0.14 (−0.32, 0.03)	−0.22 (−0.39, −0.06)	0.008	−0.07 (−0.16, 0.02)
	Zero-inflation model *²	1 (Ref.)	0.25 (−0.23, 0.73)	−0.05 (−0.52, 0.41)	0.778	−0.02 (−0.27, 0.24)
Girls	Count model *¹	1 (Ref.)	0.02 (−0.31, 0.34)	0.17 (−0.13, 0.47)	0.237	0.02 (−0.14, 0.19)
	Zero-inflation model *²	1 (Ref.)	0.6 (0.05, 1.16)	0.49 (−0.05, 1.04)	0.077	0.39 (0.08, 0.69)
Stratified by Cohort
Inattention
Gipuzkoa	Count model *¹	1 (Ref.)	−0.18 (−0.82, 0.47)	0.18 (−0.35, 0.71)	0.410	0.22 (−0.04, 0.48)
	Zero-inflation model *²	1 (Ref.)	0.8 (−0.15, 1.75)	0.05 (−0.82, 0.91)	0.873	0.16 (−0.31, 0.63)
Sabadell	Count model *¹	1 (Ref.)	−0.35 (−0.72, 0.03)	−0.22 (−0.55, 0.1)	0.116	−0.16 (−0.31, 0)
	Zero-inflation model *²	1 (Ref.)	0.38 (−0.29, 1.05)	0.03 (−0.6, 0.66)	0.887	−0.03 (−0.36, 0.3)
Valencia	Count model *¹	1 (Ref.)	−0.24 (−0.64, 0.15)	−0.39 (−0.76, −0.02)	0.043	−0.29 (−0.51, −0.06)
	Zero-inflation model *²	1 (Ref.)	−0.44 (−1.22, 0.35)	−0.6 (−1.35, 0.14)	0.123	−0.27 (−0.71, 0.18)
Hyperactivity
Gipuzkoa	Count model *¹	1 (Ref.)	−0.07 (−0.77, 0.62)	0.06 (−0.67, 0.78)	0.932	0.23 (−0.11, 0.57)
	Zero-inflation model *²	1 (Ref.)	0.65 (−0.3, 1.6)	−0.1 (−1, 0.8)	0.838	0.1 (−0.4, 0.59)
Sabadell	Count model *¹	1 (Ref.)	−0.25 (−0.6, 0.11)	−0.31 (−0.64, 0.02)	0.053	−0.12 (−0.28, 0.03)
	Zero-inflation model *²	1 (Ref.)	0.24 (−0.36, 0.85)	−0.09 (−0.69, 0.51)	0.814	−0.04 (−0.35, 0.27)
Valencia	Count model *¹	1 (Ref.)	0.06 (−0.36, 0.48)	0.06 (−0.36, 0.48)	0.904	0.01 (−0.25, 0.27)
	Zero-inflation model *²	1 (Ref.)	−0.02 (−0.87, 0.82)	0.59 (−0.17, 1.36)	0.070	0.4 (−0.03, 0.82)
ADHD
Gipuzkoa	Count model *¹	1 (Ref.)	−0.06 (−0.48, 0.36)	0.37 (−0.01, 0.74)	0.045	0.33 (0.14, 0.53)
	Zero-inflation model *²	1 (Ref.)	0.85 (0.06, 1.63)	0.27 (−0.48, 1.02)	0.412	0.28 (−0.13, 0.69)
Sabadell	Count model *¹	1 (Ref.)	−0.29 (−0.53, −0.06)	−0.28 (−0.5, −0.07)	0.005	−0.1 (−0.21, 0)
	Zero-inflation model *²	1 (Ref.)	0.39 (−0.14, 0.92)	0.03 (−0.49, 0.55)	0.857	0.08 (−0.19, 0.35)
Valencia	Count model *¹	1 (Ref.)	0.09 (−0.16, 0.35)	−0.11 (−0.35, 0.14)	0.244	−0.07 (−0.21, 0.08)
	Zero-inflation model *²	1 (Ref.)	−0.04 (−0.68, 0.6)	0.07 (−0.55, 0.69)	0.788	0.12 (−0.24, 0.49)

Models adjusted by cohort, smoking during pregnancy, alcohol intake during pregnancy, pre-pregnancy BMI, social class, sex and age of the child, living with mother/father, and weeks (week of sample collection). For Gipuzkoa and Sabadell, models do not include the variable “lives with mother/father”. *¹ Count model coefficients (Poisson with log link). *² Zero-inflation model coefficients (binomial with logit link). ** p for the trend between tertiles. Significant associations (p < 0.05) are indicated in bold.

3. Text Correction

In the original article, the units mentioned in the abstract regarding ferritin levels were also incorrect. Hence, we corrected Abstract lines 8–10: “Comparing ferritin level by tertile, significant differences were observed between the first tertile (1.98, 20.92) and the second (20.92, 38.79) and third (38.79, 216.5) (µg/L) tertiles”.

The authors apologize for any inconvenience caused and state that the scientific conclusions are unaffected. The original article has been updated.

Reference

Santa-Marina, L.; Lertxundi, N.; Andiarena, A.; Irizar, A.; Sunyer, J.; Molinuevo, A.; Llop, S.; Julvez, J.; Beneito, A.; Ibarluzea, J.; et al. Maternal Ferritin Levels during Pregnancy and ADHD Symptoms in 4-Year-Old Children: Results from the INMA–INfancia y Medio Ambiente (Environment and Childhood) Prospective Birth Cohort Study. Int. J. Environ. Res. Public Health 2020, 17, 7704. [Google Scholar] [CrossRef] [PubMed]

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Santa-Marina, L.; Lertxundi, N.; Andiarena, A.; Irizar, A.; Sunyer, J.; Molinuevo, A.; Llop, S.; Julvez, J.; Beneito, A.; Ibarluzea, J.; et al. Correction: Santa-Marina et al. Maternal Ferritin Levels during Pregnancy and ADHD Symptoms in 4-Year-Old Children: Results from the INMA-INfancia y Medio Ambiente (Environment and Childhood) Prospective Birth Cohort Study. Int. J. Environ. Res. Public Health 2020, 17, 7704. Int. J. Environ. Res. Public Health 2021, 18, 6283. https://doi.org/10.3390/ijerph18126283

AMA Style

Santa-Marina L, Lertxundi N, Andiarena A, Irizar A, Sunyer J, Molinuevo A, Llop S, Julvez J, Beneito A, Ibarluzea J, et al. Correction: Santa-Marina et al. Maternal Ferritin Levels during Pregnancy and ADHD Symptoms in 4-Year-Old Children: Results from the INMA-INfancia y Medio Ambiente (Environment and Childhood) Prospective Birth Cohort Study. Int. J. Environ. Res. Public Health 2020, 17, 7704. International Journal of Environmental Research and Public Health. 2021; 18(12):6283. https://doi.org/10.3390/ijerph18126283

Chicago/Turabian Style

Santa-Marina, Loreto, Nerea Lertxundi, Ainara Andiarena, Amaia Irizar, Jordi Sunyer, Amaia Molinuevo, Sabrina Llop, Jordi Julvez, Andrea Beneito, Jesús Ibarluzea, and et al. 2021. "Correction: Santa-Marina et al. Maternal Ferritin Levels during Pregnancy and ADHD Symptoms in 4-Year-Old Children: Results from the INMA-INfancia y Medio Ambiente (Environment and Childhood) Prospective Birth Cohort Study. Int. J. Environ. Res. Public Health 2020, 17, 7704" International Journal of Environmental Research and Public Health 18, no. 12: 6283. https://doi.org/10.3390/ijerph18126283

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Correction: Santa-Marina et al. Maternal Ferritin Levels during Pregnancy and ADHD Symptoms in 4-Year-Old Children: Results from the INMA-INfancia y Medio Ambiente (Environment and Childhood) Prospective Birth Cohort Study. Int. J. Environ. Res. Public Health 2020, 17, 7704

1. Error in Table 3

2. Error in Table 4

3. Text Correction

Reference

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