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Does standing at work during pregnancy result in reduced infant birth weight?

Authors
Ha-E; Cho-SI; Park-H; Chen-D; Chen-C; Wang-L; Xu-X; Christiani-DC
Source
J Occup Environ Med 2002 Sep; 44(9):815-821
NIOSHTIC No.
20029521
Abstract
The purpose of this study was to investigate the association between infant birth weight and standing at work during pregnancy. A total of 1222 pregnant women employed in a large petrochemical corporation in Beijing, China, were enrolled in the study, after receiving permission from the government to have a child. The subjects were followed up from that time through their entire pregnancy, for a total of up to 12 months. All subjects delivered at the company staff hospital between 1996 and 1998. Various work-related physical activities during pregnancy were assessed using a structured questionnaire, and generalized additive models (GAMs) were performed to examine their association with birth weight. Of the assessed activities, only standing was significantly associated with birth weight. After adjusting for potential confounders, maternal standing hours per day at work was found to be significantly associated with reduced birth weight (-17.7 g, P = 0.03).
Keywords
Reproductive-hazards; Pregnancy; Risk-factors; Physical-stress; Children; Women; Humans; Statistical-analysis; Epidemiology
Contact
David C. Christiani, Harvard School of Public Health, Department of Environmental Health., 665 Huntington Ave, Boston MA 02115
CODEN
JOEMFM
Publication Date
20020901
Document Type
Journal Article
Email Address
dchris@hohp.harvard.ed
Funding Amount
1168572
Funding Type
Grant
Fiscal Year
2002
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-003027
Issue of Publication
9
ISSN
1076-2752
Priority Area
Disease and Injury: Fertility and Pregnancy Abnormalities
Source Name
Journal of Occupational and Environmental Medicine
State
MA
Performing Organization
Harvard University, Boston, Massachusetts
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