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Prenatal Exposure to Nitrogen Oxides and its Association with Birth Weight in a Cohort of Mexican Newborns from Morelos, Mexico Cover

Prenatal Exposure to Nitrogen Oxides and its Association with Birth Weight in a Cohort of Mexican Newborns from Morelos, Mexico

Annals of Global Health
Volume 84 (2018): Issue 2
By: Jessica Mendoza-Ramirez,  Albino Barraza-Villarreal,  Leticia Hernandez-Cadena,  Octavio Hinojosa de la Garza,  José Luis Texcalac Sangrador,  Luisa Elvira Torres-Sanchez,  Marlene Cortez-Lugo,  Consuelo Escamilla-Nuñez,  Luz Helena Sanin-Aguirre and  Isabelle Romieu  
Open Access
|Jul 2018
Figures & tables

Figures & Tables

Table 1

Characteristics of the study population included in the study, Morelos, Mexico.

Characteristicsn = 745%Percentiles
P25P75
Mother’s Age (years)
        Mean ± SD26.3 ± 4.722.629.9
    Education (years)
        ≤6131.74
        7 to 1229739.81
        13 to 1514819.84
        >1528838.61
    Parity > 147463.54
    Height (cm)
        Mean ± SD155.3 ± 5.7152159
    Pre-gestational Weight
        Mean ± SD61 ± 10.953.567.3
    Body Mass Index*
        Mean ± SD25.2 ± 422.327.7
    Vitamin Supplements
        Yes72296.78
    Smoking**
        Non-smoker73398.26
        Passive30440.75
        Active131.74
    Treatment Group***
        Supplement36548.93
        Placebo38151.07
Newborns
    Birth Weight (g)
        Mean ± SD3216.9 ± 43929703500
    Sex (%)
        Male39953.49
        Female34646.51
    Gestational age (weeks)
        Mean ± SD39.1 ± 1.738.140.1

[i] *: Pre-gestational.

**: During pregnancy.

***: Omega-3 fatty acid supplements during pregnancy.

Table 2

Estimated* Nitrogen Oxides Concentrations during study period, Morelos, Mexico.

PollutantsnMean ± SDp25Medianp75
NO ppb7452.7 ± 2.041.22.014.1
NO2 ppb73519.9 ± 23.810.716.520.8
NOx ppb73119.6 ± 5.616.221.0423.5
Wind speed m/sec7452.51 ± .102.42.52.6
Temperature °C74520.3 ± 2.641920.522.4

[i] * By predictive land use regression models.

Table 3

Association (coefficient per interquartile range increase) between prenatal exposure to nitrogen oxides and birth weight of newborns from Morelos, Mexico.

PollutantsBirth weight* (g)
β**CI 95%p-value
NO (n = 745)–42.46–82.73; –2.180.04
NO2 (n = 734)8.06–4.07; 20.200.19
NOx (n = 730)–39.61–77.00; –2.210.04

[i] *: Models adjusted for mother’s age and height, gestational age, sex, and passive smoking.

**: Calculated coefficient for the interquartile range: NO = 3.29ppb, NO2 = 10.16 ppb and NOx = 6.95 ppb.

Figure 1

Spatial distribution of estimated nitrogen oxides concentrations in the study zone.

DOI: https://doi.org/10.29024/aogh.914 | Journal eISSN: 2214-9996
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Language: English
Published on: Jul 27, 2018
Published by: Levy Library Press
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2018 Jessica Mendoza-Ramirez, Albino Barraza-Villarreal, Leticia Hernandez-Cadena, Octavio Hinojosa de la Garza, José Luis Texcalac Sangrador, Luisa Elvira Torres-Sanchez, Marlene Cortez-Lugo, Consuelo Escamilla-Nuñez, Luz Helena Sanin-Aguirre, Isabelle Romieu, published by Levy Library Press
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 84 (2018): Issue 2
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