SAN DIEGO — Maternal hidradenitis suppurativa (HS) is associated with an increased risk for adverse birth outcomes and childhood morbidities, including respiratory, metabolic, central nervous system, and other conditions.
Those are key findings from a longitudinal cohort study that was presented during a poster session at the annual meeting of the American Academy of Dermatology.
“HS is associated with morbidity in women of reproductive age and adverse pregnancy outcomes, [but] its effect on offspring outcomes remains unclear,” corresponding author Kaiyang Li, a third-year medical student at McGill University, Quebec, Canada, and co-authors wrote in their abstract.
To investigate the association between maternal HS and offspring outcomes at birth and with up to 16 years of follow-up, the researchers drew from a longitudinal cohort of 1,275,593 children born in Quebec between April 1, 2006 and March 31, 2022. They matched children with their mothers and used identification numbers to follow the children to note morbidities that led to hospital admissions before age 16 years. The exposure of interest was HS, and the main outcome measure was childhood hospitalizations for respiratory, cardiovascular, metabolic, and other morbidities prior to age 16 years.
Next, they estimated hazard ratios (HR) and 95% CIs for the association of maternal HS with childhood morbidity in adjusted Cox proportional hazards regression models. “As prenatal exposure to hyperandrogenism may influence boys and girls differently, we carried out subgroup analyses stratified by child sex,” they wrote.
The study population included 1283 children whose mothers had HS and 1,274,310 unexposed children. As for infant outcomes, compared with no exposure, maternal HS was associated with an increased risk for preterm birth (relative risk [RR], 1.29; 95% CI, 1,08-1.55), neonatal death (RR, 2.07; 95% CI, 1.03-14.13), birth defects (RR, 1.29; 95% CI, 1.07-1.56), congenital heart defects (RR, 1.57; 95% CI, 1.02-2.44), and orofacial defects (RR 4.29; 95% CI, 1.85-9.97).
As for long-term outcomes in the children, compared with those whose mothers did not have HS, maternal HS was associated with an increased risk for any childhood hospitalization (HR, 1.31; 95% CI, 1.19-1.44), respiratory hospitalization (HR, 1.21; 95% CI, 1.05-1.40), metabolic hospitalization (HR, 2.64; 95% CI, 1.67-4.20), gastrointestinal hospitalization (HR, 1.34; 95% CI, 1.03-1.74), and developmental hospitalization (HR, 1.92; 95% CI, 1.43-2.58).
The researchers reported having no financial disclosures. The abstract was selected as the second-place winner in the AAD’s poster competition.
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