Size at birth and preterm birth in women with lifetime eating disorders: a prospective population-based study

TY - JOUR

T1 - Size at birth and preterm birth in women with lifetime eating disorders

T2 - a prospective population-based study

AU - Micali, N.

AU - Larsen, P. Stemann

AU - Strandberg-Larsen, K.

AU - Andersen, A-M Nybo

N1 - © 2015 Royal College of Obstetricians and Gynaecologists.

PY - 2016/7

Y1 - 2016/7

N2 - OBJECTIVE: To investigate whether eating disorders are associated with lower size at birth, symmetric growth restriction, and preterm birth; and whether pregnancy smoking explains the association between anorexia nervosa and fetal growth.DESIGN: Longitudinal population-based cohort study.SETTING: Denmark.SAMPLE: Women from the Danish National Birth Cohort (n = 83 826).METHODS: Women with anorexia nervosa (n = 1609), bulimia nervosa (n = 1693) and both (anorexia + bulimia nervosa, n = 634) were compared with unexposed women (n = 76 724) (women with exposure data and singletons n = 80 660) using crude and adjusted linear and logistic regression models.MAIN OUTCOME MEASURES: Size at birth (birthweight, length, head and abdominal circumference and placental weight); gestational age; small- and large-for-gestational-age (SGA, LGA); ponderal index, abdominal/head circumference.RESULTS: Lifetime anorexia nervosa and lifetime anorexia + bulimia nervosa were prospectively associated with restricted fetal growth and higher odds of SGA [respectively, OR = 1.6 [95% CI 1.3-1.8] and OR = 1.5 [95% CI 1.2-1.9)] compared with unexposed women. Active anorexia nervosa was associated with lower birthweight, length, head and abdominal circumference, ponderal index, higher odds of SGA [OR = 2.90 (95% 1.98-4.26)] and preterm birth [OR = 1.77 (95% CI 1.00-3.12)] compared with unexposed women. Pregnancy smoking only partly explained the association between anorexia nervosa and adverse fetal outcomes.CONCLUSIONS: Maternal anorexia nervosa (both active and past) is associated with lower size at birth and symmetric growth restriction, with evidence of worse outcomes in women with active disorder. Women with anorexia nervosa should be advised about achieving full recovery before conceiving. Similarly, targeting smoking in pregnancy might improve fetal outcomes.TWEETABLE ABSTRACT: Anorexia nervosa predicts small size at birth, small-for-gestational-age and symmetric growth restriction.

AB - OBJECTIVE: To investigate whether eating disorders are associated with lower size at birth, symmetric growth restriction, and preterm birth; and whether pregnancy smoking explains the association between anorexia nervosa and fetal growth.DESIGN: Longitudinal population-based cohort study.SETTING: Denmark.SAMPLE: Women from the Danish National Birth Cohort (n = 83 826).METHODS: Women with anorexia nervosa (n = 1609), bulimia nervosa (n = 1693) and both (anorexia + bulimia nervosa, n = 634) were compared with unexposed women (n = 76 724) (women with exposure data and singletons n = 80 660) using crude and adjusted linear and logistic regression models.MAIN OUTCOME MEASURES: Size at birth (birthweight, length, head and abdominal circumference and placental weight); gestational age; small- and large-for-gestational-age (SGA, LGA); ponderal index, abdominal/head circumference.RESULTS: Lifetime anorexia nervosa and lifetime anorexia + bulimia nervosa were prospectively associated with restricted fetal growth and higher odds of SGA [respectively, OR = 1.6 [95% CI 1.3-1.8] and OR = 1.5 [95% CI 1.2-1.9)] compared with unexposed women. Active anorexia nervosa was associated with lower birthweight, length, head and abdominal circumference, ponderal index, higher odds of SGA [OR = 2.90 (95% 1.98-4.26)] and preterm birth [OR = 1.77 (95% CI 1.00-3.12)] compared with unexposed women. Pregnancy smoking only partly explained the association between anorexia nervosa and adverse fetal outcomes.CONCLUSIONS: Maternal anorexia nervosa (both active and past) is associated with lower size at birth and symmetric growth restriction, with evidence of worse outcomes in women with active disorder. Women with anorexia nervosa should be advised about achieving full recovery before conceiving. Similarly, targeting smoking in pregnancy might improve fetal outcomes.TWEETABLE ABSTRACT: Anorexia nervosa predicts small size at birth, small-for-gestational-age and symmetric growth restriction.

U2 - 10.1111/1471-0528.13825

DO - 10.1111/1471-0528.13825

M3 - Journal article

C2 - 26697807

SN - 0140-7686

VL - 123

SP - 1301

EP - 1310

JO - The Journal of obstetrics and gynaecology of the British Commonwealth

JF - The Journal of obstetrics and gynaecology of the British Commonwealth

IS - 8

ER -