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Morisaki N, Obara T, Piedvache A, Kobayashi S, Miyashita C, Nishimura T, Ishikuro M, Sata F, Horikawa R, Mori C, Metoki H, Tsuchiya KJ, Kuriyama S, Kishi R. Association Between Smoking and Hypertension in Pregnancy Among Japanese Women: A Meta-analysis of Birth Cohort Studies in the Japan Birth Cohort Consortium (JBiCC) and JECS. J Epidemiol 2023; 33:498-507. [PMID: 35934789 PMCID: PMC10483100 DOI: 10.2188/jea.je20220076] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 05/25/2022] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Recent literature suggest the effect of maternal smoking on risk of hypertensive disorders in pregnancy (HDP) and preeclampsia may differ by ethnicity; however, studies on Asians are limited. METHODS We investigated the association of maternal smoking with HDP and preeclampsia using a common analysis protocol to analyze the association in six birth cohorts participating in a Japanese consortium of birth cohorts (JBiCC). Results were compared with-published results from cohorts not included in this consortium, and, where possible, we produced a meta-analysis including these studies. RESULTS Meta-analysis of four cohort studies including 28,219 participants produced an odds ratio (OR) of 1.24 (95% confidence interval [CI], 0.88-1.87) for the effect of smoking beyond early pregnancy compared to women who did not smoke during pregnancy. These results combined with those from the Japan Environment and Children's Study (JECS) yielded an OR of 1.19 (95% CI, 1.00-1.43, P = 0.056). Meta-analysis results for categories of smoking volume were insignificant, but when combined with JECS yielded an OR of 0.86 (95% CI, 0.65-1.12) for smoking 1-4 cigarettes, 1.25 (95% CI, 0.98-1.60) for smoking 5-9 cigarettes, and 1.27 (95% CI, 1.04-1.54) for smoking 10 or more cigarettes per day. All effects were insignificant for preeclampsia. CONCLUSION Our results suggest that the protective effects of smoking longer and smoking more on HDP and preeclampsia repeatedly observed among Europeans and North Americans likely do not hold for the Japanese.
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Affiliation(s)
- Naho Morisaki
- Department of Social Medicine, National Center for Child Health and Development, Tokyo, Japan
| | - Taku Obara
- Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | - Aurelie Piedvache
- Department of Social Medicine, National Center for Child Health and Development, Tokyo, Japan
| | - Sumitaka Kobayashi
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo, Japan
| | - Chihiro Miyashita
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo, Japan
| | - Tomoko Nishimura
- Center for Child Mental Development, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Mami Ishikuro
- Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | | | - Reiko Horikawa
- Division of Endocrinology and Metabolism, National Center for Child Health and Development, Tokyo, Japan
| | - Chisato Mori
- Department of Bioenvironmental Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Hirohito Metoki
- Division of Public Health, Hygiene and Epidemiology, Tohoku Medical and Pharmaceutical University Faculty of Medicine, Sendai, Japan
| | - Kenji J Tsuchiya
- Center for Child Mental Development, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Shinichi Kuriyama
- Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | - Reiko Kishi
- Center for Environmental and Health Sciences, Hokkaido University, Sapporo, Japan
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Yoshida A, Kaneko K, Aoyama K, Yamaguchi N, Suzuki A, Kato S, Ebara T, Sugiura-Ogasawara M, Kamijima M, Saitoh S. Relationship between Birth Order and Postnatal Growth until 4 Years of Age: The Japan Environment and Children’s Study. CHILDREN 2023; 10:children10030557. [PMID: 36980116 PMCID: PMC10047297 DOI: 10.3390/children10030557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 03/11/2023] [Accepted: 03/14/2023] [Indexed: 03/18/2023]
Abstract
Later-borns tend to be shorter than first-borns in childhood and adulthood. However, large-scale prospective studies examining growth during infancy according to birth order are limited. We aimed to investigate the relationship between birth order and growth during the first 4 years of life in a Japanese prospective birth cohort study. A total of 26,249 full-term singleton births were targeted. General linear and multivariable logistic regression models were performed and adjusted for birth weight, parents’ heights, maternal age at delivery, gestational weight gain, maternal smoking and alcohol drinking status during pregnancy, household income, breastfeeding status, and Study Areas. The multivariate adjusted mean length Z-scores in “first-borns having no sibling”, “first-borns having siblings”, “second-borns”, and “third-borns or more” were −0.026, −0.013, 0.136, and 0.120 at birth and −0.324, −0.330, −0.466, and −0.569 at 10 months, respectively. Results similar to those at 10 months were observed at 1.5, 3, and 4 years. The adjusted odds ratios (95% confidence intervals) of short stature at 4 years in “first-borns having siblings”, “second-borns”, and “third-borns or more” were 1.08 (0.84–1.39), 1.36 (1.13–1.62), and 1.50 (1.20–1.88), respectively, versus “first-borns having no sibling”. Birth order was significantly associated with postnatal growth and may be a factor predisposing to short stature in early childhood.
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Affiliation(s)
- Aya Yoshida
- Department of Pediatrics and Neonatology, Graduate School of Medical Sciences, Nagoya City University, Nagoya 4670001, Japan
| | - Kayo Kaneko
- Department of Occupational and Environmental Health, Graduate School of Medical Sciences, Nagoya City University, Nagoya 4670001, Japan
| | - Kohei Aoyama
- Department of Pediatrics and Neonatology, Graduate School of Medical Sciences, Nagoya City University, Nagoya 4670001, Japan
- Correspondence: ; Tel.: +81-52-853-8246
| | - Naoya Yamaguchi
- Department of Pediatrics and Neonatology, Graduate School of Medical Sciences, Nagoya City University, Nagoya 4670001, Japan
| | - Atsushi Suzuki
- Department of Pediatrics and Neonatology, Graduate School of Medical Sciences, Nagoya City University, Nagoya 4670001, Japan
| | - Sayaka Kato
- Department of Occupational and Environmental Health, Graduate School of Medical Sciences, Nagoya City University, Nagoya 4670001, Japan
| | - Takeshi Ebara
- Department of Occupational and Environmental Health, Graduate School of Medical Sciences, Nagoya City University, Nagoya 4670001, Japan
- Department of Ergonomics, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu 8078555, Japan
| | - Mayumi Sugiura-Ogasawara
- Department of Obstetrics and Gynecology, Graduate School of Medical Sciences, Nagoya City University, Nagoya 4670001, Japan
| | - Michihiro Kamijima
- Department of Occupational and Environmental Health, Graduate School of Medical Sciences, Nagoya City University, Nagoya 4670001, Japan
| | - Shinji Saitoh
- Department of Pediatrics and Neonatology, Graduate School of Medical Sciences, Nagoya City University, Nagoya 4670001, Japan
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