Author:
Buen Mariana,Amaral Eliana,Souza Renato T.,Passini Renato,Lajos Giuliane J.,Tedesco Ricardo P.,Nomura Marcelo L.,Dias Tábata Z.,Rehder Patrícia M.,Sousa Maria Helena,Cecatti José Guilherme,Marba Sérgio T.,Matias Jacinta P.,Maia Filho Nelson L.,Borges Vera T. M.,Oliveira Laércio R.,Oliveira Tenilson A.,Assumpção Augusta M. B.,Moreira Maria E. L.,Guedes Marcela,Senger Cintia E,Vettorazzi Janete,Martinez Francisco E.,Quintana Silvana M.,Melli Patricia P. S.,Lima Antonio C. F. Barbosa,Leite Debora F.,Melo Junior Elias,Nascimento Denis J.,Tristão Edson G.,Siqueira Luciana F.,Coutinho Pedro R.,Guinsburg Ruth,Zamarian Ana C. P.,Souza Eduardo,Martins Marilia G.,Nunes Marynea V.,Paiva Claudio S. M.,Freire Djacyr M. C.,Lima Moisés D.,Porto Ana M. F.,Coelho Isabela C.,Melo Adriana S. O.,Melo Fabiana O.,Amorim Melânia M. R.,Menezes Carlos A. S.,Aquino Marcelo,Feitosa Francisco E. L.,Chaves George N.,Silveira Miriam R. F.,Sass Nelson,Lotufo Fátima A. H.,Uzilin Kaliane P.,Andreucci Carla B.,Zanette Elvira A. O.,
Abstract
AbstractSpontaneous preterm birth (sPTB) is a major pregnancy complication involving biological, social, behavioural and environmental mechanisms. Workload, shift and intensity may play a role in the occurrence of sPTB. This analysis is aimed addressing the effect of occupational activities on the risk for sPTB and the related outcomes. We conducted a secondary analysis of the EMIP study, a Brazilian multicentre cross-sectional study. For this analysis, we included 1,280 singleton sPTB and 1,136 singleton term birth cases. Independent variables included sociodemographic characteristics, clinical complications, work characteristics, and physical effort devoted to household chores. A backward multiple logistic regression analysis was applied for a model using work characteristics, controlled by cluster sampling design. On bivariate analysis, discontinuing work during pregnancy and working until the 7th month of pregnancy were risks for premature birth while working during the 8th - 9th month of pregnancy, prolonged standing during work and doing household chores appeared to be protective against sPTB during pregnancy. Previous preterm birth, polyhydramnios, vaginal bleeding, stopping work during pregnancy, or working until the 7th month of pregnancy were risk factors in the multivariate analysis. The protective effect of variables compatible with exertion during paid work may represent a reverse causality. Nevertheless, a reduced risk associated with household duties, and working until the 8th-9th month of pregnancy support the hypothesis that some sort of physical exertion may provide actual protection against sPTB.
Publisher
Springer Science and Business Media LLC