title: Impact of the 2008 Beijing Olympics on the risk of pregnancy complications.
abstract: Taking advantage of the natural experiment of the 2008 Beijing Olympics (August 8 to September 24), when air pollution levels decreased by 13% to 60%, the authors assessed whether having ≥1 pregnancy month during the Olympics was associated with decreased risks of hypertensive disorders (HDs) and/or fetal-placental conditions (FPCs). Singleton births to mothers with ≥1 pregnancy month in 2008 or 2009 (N = 56,155) were included. Using generalized additive models, the authors estimated the risk of HDs and FPCs associated with (1) the 2008 Olympics compared with the same dates in 2009, and (2) increased mean ambient PM10 (particulate matter with an aerodynamic diameter <10 μm), NO2 (nitrogen dioxide), and SO2 (sulfur dioxide) concentrations during each trimester. However, no association between HDs or FPCs and having any trimester during the 2008 Olympic period was found. This may, in part, be due to a small number of pregnancy complications in this population.
authors.affiliation: a Department of Public Health Sciences , School of Medicine and Dentistry, University of Rochester , Rochester , New York , USA.
authors.forename: Vanessa
authors.initials: V
authors.lastname: Assibey-Mensah
authors.affiliation: b Department of Maternal and Child Health, Beijing Obstetrics and Gynecology Hospital, Capital Medical University , Beijing , China.
authors.forename: Kaibo
authors.initials: K
authors.lastname: Liu
authors.affiliation: c Department of Biostatistics and Computational Biology , School of Medicine and Dentistry , University of Rochester, Rochester , New York, USA.
authors.forename: Sally W
authors.initials: SW
authors.lastname: Thurston
authors.affiliation: d Department of Pediatrics, School of Medicine and Dentistry, University of Rochester , Rochester , New York , USA.
authors.forename: Timothy P
authors.initials: TP
authors.lastname: Stevens
authors.affiliation: e Nicholas School of the Environment, Duke University , Durham , North Carolina , USA.|f Duke Global Health Institute, Duke University , Durham , North Carolina , USA.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Zhang
authors.affiliation: g Department of Environmental Pollution and Health, Chinese Research Academy of Environmental Health Sciences , Beijing , China.
authors.forename: Jinliang
authors.initials: J
authors.lastname: Zhang
authors.affiliation: a Department of Public Health Sciences , School of Medicine and Dentistry, University of Rochester , Rochester , New York , USA.
authors.forename: Cathleen
authors.initials: C
authors.lastname: Kane
authors.affiliation: b Department of Maternal and Child Health, Beijing Obstetrics and Gynecology Hospital, Capital Medical University , Beijing , China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Pan
authors.affiliation: h Department of Pediatrics, Robert Wood Johnson Medical School, Rutgers University , New Brunswick , New Jersey , USA.
authors.forename: Barry
authors.initials: B
authors.lastname: Weinberger
authors.affiliation: i Department of Biostatistics, School of Public Health, Rutgers University , Piscataway , New Jersey , USA.
authors.forename: Pamela
authors.initials: P
authors.lastname: Ohman-Strickland
authors.affiliation: j Program on Reproductive Health and the Environment, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Francisco , San Francisco , California , USA.
authors.forename: Tracey
authors.initials: T
authors.lastname: Woodruff
authors.affiliation: a Department of Public Health Sciences , School of Medicine and Dentistry, University of Rochester , Rochester , New York , USA.
authors.forename: David Q
authors.initials: DQ
authors.lastname: Rich
mesh_terms: D000328:Adult; D000397:Air Pollution / Q000009:adverse effects*; D000846:Anniversaries and Special Events; D000068476:Beijing; D005260:Female; D006801:Humans; D006973:Hypertension / Q000453:epidemiology; D052638:Particulate Matter / Q000032:analysis / Q000506:poisoning; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology*; D018570:Risk Assessment; D013177:Sports
chemical_list: D052638:Particulate Matter
keywords: 2008 Beijing Olympics; air pollution reduction; hypertensive disorders; placental conditions; pregnancy complications