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Ishitsuka K, Piedvache A, Kobayashi S, Iwama N, Nishimura T, Watanabe M, Metoki H, Iwata H, Miyashita C, Ishikuro M, Obara T, Sakurai K, Rahman MS, Tanaka K, Miyake Y, Horikawa R, Kishi R, Tsuchiya KJ, Mori C, Kuriyama S, Morisaki N. The Population-Attributable Fractions of Small-for-Gestational-Age Births: Results from the Japan Birth Cohort Consortium. Nutrients 2024; 16:186. [PMID: 38257079 PMCID: PMC10820645 DOI: 10.3390/nu16020186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 12/22/2023] [Accepted: 01/03/2024] [Indexed: 01/24/2024] Open
Abstract
A fetal growth restriction is related to adverse child outcomes. We investigated risk ratios and population-attributable fractions (PAF) of small-for-gestational-age (SGA) infants in the Japanese population. Among 28,838 infants from five ongoing prospective birth cohort studies under the Japan Birth Cohort Consortium, two-stage individual-participant data meta-analyses were conducted to calculate risk ratios and PAFs for SGA in advanced maternal age, pre-pregnancy underweight, and smoking and alcohol consumption during pregnancy. Risk ratio was calculated using modified Poisson analyses with robust variance and PAF was calculated in each cohort, following common analyses protocols. Then, results from each cohort study were combined by meta-analyses using random-effects models to obtain the overall estimate for the Japanese population. In this meta-analysis, an increased risk (risk ratio, [95% confidence interval of SGA]) was significantly associated with pre-pregnancy underweight (1.72 [1.42-2.09]), gestational weight gain (1.95 [1.61-2.38]), and continued smoking during pregnancy (1.59 [1.01-2.50]). PAF of underweight, inadequate gestational weight gain, and continued smoking during pregnancy was 10.0% [4.6-15.1%], 31.4% [22.1-39.6%], and 3.2% [-4.8-10.5%], respectively. In conclusion, maternal weight status was a major contributor to SGA births in Japan. Improving maternal weight status should be prioritized to prevent fetal growth restriction.
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Affiliation(s)
- Kazue Ishitsuka
- Department of Social Medicine, National Center for Child Health and Development, 2-10-1, Okura, Setagaya-ku, Tokyo 157-8535, Japan; (A.P.); (N.M.)
| | - Aurélie Piedvache
- Department of Social Medicine, National Center for Child Health and Development, 2-10-1, Okura, Setagaya-ku, Tokyo 157-8535, Japan; (A.P.); (N.M.)
| | - Sumitaka Kobayashi
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo 060-0808, Japan; (S.K.); (H.I.); (C.M.); (R.K.)
| | - Noriyuki Iwama
- Tohoku Medical Megabank Organization, Tohoku University, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8573, Japan; (N.I.); (M.I.); (T.O.); (S.K.)
- Department of Obstetrics and Gynecology, Tohoku University Graduate School of Medicine, 1-1, Seiryomachi, Sendai 980-8574, Japan
| | - Tomoko Nishimura
- Research Center for Child Mental Development, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu 431-3192, Japan; (T.N.); (K.J.T.); (M.S.R.)
| | - Masahiro Watanabe
- Department of Sustainable Health Science, Center for Preventive Medical Sciences, Chiba University, Chiba 263-8522, Japan; (M.W.); (C.M.)
| | - Hirohito Metoki
- Faculty of Medicine, Tohoku Medical and Pharmaceutical University, 1-15-1, Fukumuro, Miyagino-ku, Sendai 983-8536, Japan;
| | - Hiroyoshi Iwata
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo 060-0808, Japan; (S.K.); (H.I.); (C.M.); (R.K.)
| | - Chihiro Miyashita
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo 060-0808, Japan; (S.K.); (H.I.); (C.M.); (R.K.)
| | - Mami Ishikuro
- Tohoku Medical Megabank Organization, Tohoku University, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8573, Japan; (N.I.); (M.I.); (T.O.); (S.K.)
| | - Taku Obara
- Tohoku Medical Megabank Organization, Tohoku University, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8573, Japan; (N.I.); (M.I.); (T.O.); (S.K.)
| | - Kenichi Sakurai
- Department of Nutrition and Metabolic Medicine, Center for Preventive Medical Sciences, Chiba University, Chiba 263-8522, Japan;
- Department of Bioenvironmental Medicine, Graduate School of Medicine, Chiba University, Chiba 263-8522, Japan
| | - Mohammad Shafiur Rahman
- Research Center for Child Mental Development, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu 431-3192, Japan; (T.N.); (K.J.T.); (M.S.R.)
| | - Keiko Tanaka
- Department of Epidemiology and Preventive Medicine, Ehime University Graduate School of Medicine, 10-13 Dogo-Himata, Matsuyama 790-8577, Japan; (K.T.); (Y.M.)
| | - Yoshihiro Miyake
- Department of Epidemiology and Preventive Medicine, Ehime University Graduate School of Medicine, 10-13 Dogo-Himata, Matsuyama 790-8577, Japan; (K.T.); (Y.M.)
| | - Reiko Horikawa
- Division of Endocrinology and Metabolism, National Center for Child Health and Development, 2-10-1 Okura, Setagaya-ku, Tokyo 157-8535, Japan;
| | - Reiko Kishi
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo 060-0808, Japan; (S.K.); (H.I.); (C.M.); (R.K.)
| | - Kenji J. Tsuchiya
- Research Center for Child Mental Development, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu 431-3192, Japan; (T.N.); (K.J.T.); (M.S.R.)
| | - Chisato Mori
- Department of Sustainable Health Science, Center for Preventive Medical Sciences, Chiba University, Chiba 263-8522, Japan; (M.W.); (C.M.)
- Department of Bioenvironmental Medicine, Graduate School of Medicine, Chiba University, Chiba 263-8522, Japan
| | - Shinichi Kuriyama
- Tohoku Medical Megabank Organization, Tohoku University, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8573, Japan; (N.I.); (M.I.); (T.O.); (S.K.)
| | - Naho Morisaki
- Department of Social Medicine, National Center for Child Health and Development, 2-10-1, Okura, Setagaya-ku, Tokyo 157-8535, Japan; (A.P.); (N.M.)
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