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Thyroid. 2019 Jun;29(6):879-885. doi: 10.1089/thy.2018.0283. Epub 2019 May 9.

Risk of Adverse Obstetric Outcomes and the Abnormal Growth of Offspring in Women with a History of Thyroid Cancer.

Author information

1
1 Department of Obstetrics and Gynecology, Korea University College of Medicine, Seoul, Republic of Korea.
2
2 Olson Center for Women's Health, Department of Obstetrics and Gynecology, and Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska.
3
3 Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois.
4
4 School of Industrial Management Engineering, Korea University, Seoul, Republic of Korea.

Abstract

Background: It is unclear whether a history of thyroid cancer is associated with an increased risk of adverse pregnancy outcomes in subsequent pregnancies. This study aimed to evaluate the risk of adverse obstetric outcomes and the abnormal growth of offspring in women with a history of thyroid cancer. Methods: This retrospective observational study used nationwide data from between 2006 and 2014 to compare pregnancy outcomes of women with a history of thyroid cancer and those with no such history. Cases of thyroid cancer were identified using ICD-10 codes. Results: During the study period, 7232 women with a history of thyroid cancer and 2,269,051 women without a history of thyroid cancer gave birth. The risks of cesarean section, preterm birth, low birth weight, large for gestational age, preeclampsia, placental abruption, placenta previa, and stillbirth were not different between the groups. Women with a history of thyroid cancer had a statistically higher risk of postpartum hemorrhage (odds ratio [OR] = 1.23 [confidence interval (CI) 1.15-1.32], p < 0.05, corrected with the false discovery rate). Additionally, generalized estimating equations analysis showed that there was no difference in the risk of underweight (OR = 1.05 [CI 0.93-1.19]) and obese (OR = 0.94 [CI 0.84-1.05]) offspring assessed over a period of 80 months after adjusting for confounding factors. Conclusions: Women with a history of thyroid cancer have similar pregnancy outcomes and offspring growth to those with no such history.

KEYWORDS:

adverse outcome; pregnancy; thyroid cancer

PMID:
30957663
DOI:
10.1089/thy.2018.0283

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