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. 2021 Jul 1;157(7):788-795.
doi: 10.1001/jamadermatol.2021.1090.

Evaluation of Topical Corticosteroid Use in Pregnancy and Risk of Newborns Being Small for Gestational Age and Having Low Birth Weight

Affiliations

Evaluation of Topical Corticosteroid Use in Pregnancy and Risk of Newborns Being Small for Gestational Age and Having Low Birth Weight

Niklas Worm Andersson et al. JAMA Dermatol. .

Abstract

Importance: Topical corticosteroids are frequently used during pregnancy. Limited data have raised concerns about an increased risk of the newborn being small for gestational age (SGA) and having low birth weight, in particular with use of potent to very potent agents during pregnancy.

Objective: To evaluate whether topical corticosteroid use in pregnancy is associated with increased risks of SGA and low birth weight.

Design, setting, and participants: From a source cohort of 1.1 million pregnancies with individual-level informed data from various registries, this nationwide cohort study identified topical corticosteroid-exposed pregnancies in Denmark from January 1, 1997, to December 31, 2016, for a total of 60 497, that were matched with 241 986 unexposed pregnancies on the basis of propensity scores, including a wide set of baseline characteristics. Data analysis was performed from September 8, 2020, to February 23, 2021.

Exposures: Filled prescriptions for topical corticosteroids during pregnancy.

Main outcomes and measures: Primary outcomes were SGA and low birth weight. Association between outcomes and exposure was assessed by relative risk ratios (RRs) and absolute risk differences (ARDs).

Results: Among the 60 497 matched pregnancies exposed to topical corticosteroids, 5678 (9.4%) of the delivered infants were born SGA compared with 22 634 infants (9.4%) among the matched unexposed pregnancies (RR, 1.00; 95% CI, 0.98-1.03 and ARD, 0.3; 95% CI, -2.3 to 2.9 per 1000 pregnancies). Low birth weight occurred in 2006 (3.3%) of the exposed pregnancies compared with 8675 (3.6%) of the unexposed pregnancies (RR, 0.92; 95% CI, 0.88-0.97 and ARD, -2.7; 95% CI, -4.3 to -1.1 per 1000 pregnancies). Exposure to potent to very potent topical corticosteroids at any amount was not associated with an increased risk of SGA (RR, 1.03; 95% CI, 0.99-1.07) or low birth weight (RR, 0.94; 95% CI, 0.88-1.00). Post hoc analyses did not find a significant increased risk among those receiving large amounts of potent to very potent topical corticosteroids (ie, >200 g throughout pregnancy) compared with unexposed pregnancies (RR, 1.17; 95% CI, 0.95-1.46 for SGA and RR 1.14; 95% CI, 0.81-1.60 for low birth weight).

Conclusions and relevance: This large cohort study found no association between topical corticosteroid use in pregnancy and an increased risk of SGA or low birth weight. These results suggest that a moderate to large increase in the risk is unlikely, even when large amounts of potent to very potent topical corticosteroids are used in pregnancy.

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Conflict of interest statement

Conflict of Interest Disclosures: Dr Skov reported receiving consulting fees from AbbVie, Janssen Cilag, Novartis, Eli Lilly, LEO Pharma, UCB, Almirall, Bristol Myers Squibb, and Sanofi and grants from Janssen, BMS, Novartis, Leo and Pharma outside the submitted work. No other disclosures were reported.

Figures

Figure.
Figure.. Flowchart of the Study Design and Construction of the Study Cohort
aCould be excluded for more than 1 reason. bFilled prescription for any topical corticosteroid preparations, including combination products from 3 months earlier and through pregnancy.

References

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