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Placental weight and birthweight: the relations with number of daily cigarettes and smoking cessation in pregnancy. A population study

Larsen, Sandra, Haavaldsen, Camilla, Bjelland, Elisabeth Krefting, Dypvik, Johanne, Jukic, Anne Marie, Eskild, Anne·2018·International Journal of Epidemiology
DOI 10.1093/ije/dyy110PMC PMC6124614
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Figure 1. Flow chart of study sample.
Figure 1. Flow chart of study sample.CC BY-NC · PubMed Central
Figure 2. Estimated differences in placental weight, birthweight and placental to birthweight ratio according to number of daily cigarettes in the first trimester of pregnancy. Adjusted for year of delivery. (A-C) Non-smokers and daily smokers throughout pregnancy were included in the analyses (n = 660 154); (D-F) Non-smokers and women who stopped daily smoking after the first trimester were included in the analyses (n = 624 165). Non-smokers were used as the reference category. Data were fitted by the use of a linear regression model with restricted cubic splines with three knots (3, 7 and 15 daily cigarettes). Dashed lines represent 95% confidence intervals.
Figure 2. Estimated differences in placental weight, birthweight and placental to birthweight ratio according to number of daily cigarettes in the first trimester of pregnancy. Adjusted for year of delivery. (A-C) Non-smokers and daily smokers throughout pregnancy were included in the analyses (n = 660 154); (D-F) Non-smokers and women who stopped daily smoking after the first trimester were included in the analyses (n = 624 165). Non-smokers were used as the reference category. Data were fitted by the use of a linear regression model with restricted cubic splines with three knots (3, 7 and 15 daily cigarettes). Dashed lines represent 95% confidence intervals.CC BY-NC · PubMed Central
Figure 3. Estimated differences in placental weight z-scores and birthweight z-scores according to number of daily cigarettes in the first trimester of pregnancy. Adjusted for year of delivery. (A, B) Non-smokers and daily smokers throughout pregnancy were included in the analyses (n = 660 154). (C, D) Non-smokers and daily smokers who stopped after the first trimester (n = 624 165) were included in the analyses. Non-smokers were used as the reference category. Data were fitted by the use of a linear regression model with restricted cubic splines with three knots (3, 7 and 15 daily cigarettes). Dashed lines represent 95% confidence intervals.
Figure 3. Estimated differences in placental weight z-scores and birthweight z-scores according to number of daily cigarettes in the first trimester of pregnancy. Adjusted for year of delivery. (A, B) Non-smokers and daily smokers throughout pregnancy were included in the analyses (n = 660 154). (C, D) Non-smokers and daily smokers who stopped after the first trimester (n = 624 165) were included in the analyses. Non-smokers were used as the reference category. Data were fitted by the use of a linear regression model with restricted cubic splines with three knots (3, 7 and 15 daily cigarettes). Dashed lines represent 95% confidence intervals.CC BY-NC · PubMed Central

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Metadata

Authors
Larsen, S., Haavaldsen, C., Bjelland, E. K., Dypvik, J., Jukic, A. M., & Eskild, A.
Affiliations
  • Department of Obstetrics and Gynecology, Akershus University Hospital, Lørenskog, Norway
  • Department of Chronic Disease Epidemiology, Yale School of Public Health, Yale University, New Haven, CT, USA
ORCID
Bjelland, Elisabeth Krefting
Venue
International Journal of Epidemiology
Publisher
Oxford University Press (OUP)
Published
2018-06-26
Volume
47
Issue
4
Pages
1141-1150
ISSN
  • 0300-5771
  • 1464-3685
DOI
10.1093/ije/dyy110
PMC
PMC6124614
Cited by
48
References
2
Language
en
Licence
creativecommons.org/licenses/by-nc/4.0/ (vor, 1 d)
Funders
South-Eastern Norway Regional Health Authority (2013003, 2014008, 2012001)

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CoChat. (2026). Citation check: Placental weight and birthweight: the relations with number of daily cigarettes and smoking cessation in pregnancy. A population study. https://app.cochat.ai/papers/10.1093/ije/dyy110
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Larsen, S., Haavaldsen, C., Bjelland, E. K., Dypvik, J., Jukic, A. M., & Eskild, A. (2018). Placental weight and birthweight: the relations with number of daily cigarettes and smoking cessation in pregnancy. A population study. International Journal of Epidemiology. https://doi.org/10.1093/ije/dyy110