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Different Risk Factors for Very Low Birth Weight, Term-Small-for-Gestational-Age, or Preterm Birth in Japan

Author

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  • Naomi Tamura

    (Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
    Graduate School of Health Sciences, Hokkaido University, Kita 8, Nishi 5, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan)

  • Tomoyuki Hanaoka

    (Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan)

  • Kumiko Ito

    (Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
    Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan)

  • Atsuko Araki

    (Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
    Graduate School of Health Sciences, Hokkaido University, Kita 8, Nishi 5, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan)

  • Chihiro Miyashita

    (Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan)

  • Sachiko Ito

    (Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan)

  • Hisanori Minakami

    (Department of Obstetrics and Gynecology, Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan)

  • Kazutoshi Cho

    (Department of Obstetrics and Gynecology, Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan)

  • Toshiaki Endo

    (Department of Obstetrics and Gynecology, School of Medicine, Sapporo Medical University, Chuo-ku, Sapporo, 060-8556, Japan)

  • Kazuo Sengoku

    (Department of Obstetrics and Gynecology, Asahikawa Medical University, 2-1-1-1, Midorigaoka Higashi,. Asahikawa, 078-8510, Japan)

  • Katsuhiko Ogasawara

    (Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
    Faculties of Health Science, Hokkaido University, Kita12, Nishi5, Kita-ku, Sapporo, 060-0812, Japan)

  • Reiko Kishi

    (Center for Environmental and Health Sciences, Hokkaido University, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan)

Abstract

From 1985 to 2013, the mean birth weight of infants in Japan decreased from 3120 g to 3000 g, and the low-birth-weight rate among live births increased from 6.3% to 9.6%. No prospective study has elucidated the risk factors for poor fetal growth and preterm birth in recent Japanese parents, such as increased parental age, maternal body figure, assisted reproductive technology (ART), and socioeconomic status. Participants were mother–infant pairs ( n = 18,059) enrolled in a prospective birth cohort in Hokkaido, Japan from 2002 to 2013. Parental characteristics were obtained via self-reported questionnaires during pregnancy. Medical records helped identify very-low-birth-weight (VLBW; <1500g), term-small-for-gestational-age (term-SGA), and preterm-birth (PTB; <37 weeks) infants. We calculated relative risks (RRs) for PTB, VLBW, and term-SGA birth based on parental characteristics. The prevalence of PTB, VLBW, and term-SGA was 4.5%, 0.4%, and 6.5%, respectively. Aged parents and ART were risk factors for PTB and VLBW. Maternal alcohol drinking during pregnancy increased the risk; a parental educational level of ≥16 years reduced risk of term-SGA. Maternal pre-pregnancy BMI of <18.5 kg/m 2 increased the risk of PTB and term-SGA. The RR for low BMI was highest among mothers who have low educational level. Among various factors, appropriate nutritional education to maintain normal BMI is important to prevent PTB and term-SGA in Japan.

Suggested Citation

  • Naomi Tamura & Tomoyuki Hanaoka & Kumiko Ito & Atsuko Araki & Chihiro Miyashita & Sachiko Ito & Hisanori Minakami & Kazutoshi Cho & Toshiaki Endo & Kazuo Sengoku & Katsuhiko Ogasawara & Reiko Kishi, 2018. "Different Risk Factors for Very Low Birth Weight, Term-Small-for-Gestational-Age, or Preterm Birth in Japan," IJERPH, MDPI, vol. 15(2), pages 1-18, February.
    • Handle: RePEc:gam:jijerp:v:15:y:2018:i:2:p:369-:d:132569
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    References listed on IDEAS

    as
    1. Reichman, N.E. & Teitler, J.O., 2006. "Paternal age as a risk factor for low birthweight," American Journal of Public Health, American Public Health Association, vol. 96(5), pages 862-866.
    2. Takimoto, H. & Yoshiike, N. & Kaneda, F. & Yoshita, K., 2004. "Thinness among young Japanese women," American Journal of Public Health, American Public Health Association, vol. 94(9), pages 1592-1595.
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    Cited by:

    1. Tasuku Okui & Masayuki Ochiai & Naoki Nakashima, 2021. "An Association between Maternal Occupations and Low Birth Weight Infants in Japan from 1995 to 2015," IJERPH, MDPI, vol. 18(15), pages 1-9, July.
    2. Kritika Poudel & Sumitaka Kobayashi & Chihiro Miyashita & Atsuko Ikeda-Araki & Naomi Tamura & Yu Ait Bamai & Sachiko Itoh & Keiko Yamazaki & Hideyuki Masuda & Mariko Itoh & Kumiko Ito & Reiko Kishi, 2021. "Hypertensive Disorders during Pregnancy (HDP), Maternal Characteristics, and Birth Outcomes among Japanese Women: A Hokkaido Study," IJERPH, MDPI, vol. 18(7), pages 1-16, March.
    3. Zainab Taha & Ahmed Ali Hassan & Ludmilla Wikkeling-Scott & Dimitrios Papandreou, 2020. "Factors Associated with Preterm Birth and Low Birth Weight in Abu Dhabi, the United Arab Emirates," IJERPH, MDPI, vol. 17(4), pages 1-10, February.

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