title: Physical activity and risk of small-for-gestational-age birth among predominantly Puerto Rican women.
abstract: To estimate the association between multiple domains of physical activity and risk of small-for-gestational-age (SGA) birth. We utilized data from 1,040 participants in the Latina Gestational Diabetes Mellitus Study, a prospective cohort of predominantly Puerto Rican prenatal care patients in Massachusetts. Physical activity was assessed by bilingual interviewers using a modified version of the Kaiser physical activity survey in early (mean = 15 weeks) and mid pregnancy (mean = 28 weeks). Physical activity (i.e., sports/exercise, household, occupational, and active living) in pre, early and mid pregnancy was categorized in quartiles. SGA was classified as <10th percentile of birth weight for gestational age. Pre- and early-pregnancy physical activity were not associated with SGA. In multivariable analyses, women with high total activity in mid-pregnancy had a decreased risk of SGA [risk ratio (RR) = 0.42; 95% confidence interval (CI) 0.21-0.82; p(trend) = 0.003] as compared to those with low total activity. Findings were similar for high household activity (RR = 0.69; 95% CI = 0.34-1.40; p(trend) = 0.26), active living (RR = 0.63; 95% CI = 0.35-1.13; p(trend) = 0.04), and occupational activity (RR = 0.79, 95% CI = 0.47-1.34; p(trend) = 0.26). High levels of sports/exercise were associated with an increased SGA risk without a significant dose-response association (RR = 2.14, 95% CI 1.04-4.39; p(trend) = 0.33). Results extend prior studies of physical activity and SGA to the Hispanic population.
authors.affiliation: Department of Biostatistics & Epidemiology, School of Public Health and Health Sciences, University of Massachusetts, Amherst, MA 01003-9304, USA.
authors.forename: Audra L
authors.initials: AL
authors.lastname: Gollenberg
authors.forename: Penelope
authors.initials: P
authors.lastname: Pekow
authors.forename: Elizabeth R
authors.initials: ER
authors.lastname: Bertone-Johnson
authors.forename: Patty S
authors.initials: PS
authors.lastname: Freedson
authors.forename: Glenn
authors.initials: G
authors.lastname: Markenson
authors.forename: Lisa
authors.initials: L
authors.lastname: Chasan-Taber
mesh_terms: D000203:Activities of Daily Living; D000293:Adolescent; D000328:Adult; D015331:Cohort Studies; D036861:Delivery, Obstetric; D015444:Exercise; D005260:Female; D006630:Hispanic or Latino; D006801:Humans; D007231:Infant, Newborn; D007236:Infant, Small for Gestational Age; D007899:Leisure Activities; D008404:Massachusetts; D011247:Pregnancy; D011248:Pregnancy Complications / Q000208:ethnology*; D011295:Prenatal Care; D011446:Prospective Studies; D011647:Puerto Rico / Q000208:ethnology; D012307:Risk Factors; D055815:Young Adult