Treat-to-Target Approach for RA Improves Time to Pregnancy

WASHINGTON — Women with rheumatoid arthritis (RA) experience improved fertility when treated using a treat-to-target (T2T) approach aimed at remission, according to a new research presented at the American College of Rheumatology (ACR) 2024 Annual Meeting.

In the study, more than half the women following this T2T approach were able to conceive within 3 months, which is “nearly equal to the general population,” said presenter and senior author Radboud Dolhain, MD, PhD. He heads the Department of Rheumatology at Erasmus University Medical Center in Rotterdam, the Netherlands.

Compared with 10%-15% of the general population, as many as 42% of patients with RA are not able to get pregnant within 1 year of unprotected intercourse.

“For people who are thinking about pregnancy or want to plan for pregnancy, talking with them about the importance of making sure their RA is well-treated is an essential aspect,” said Mehret Birru Talabi, MD, PhD, director of the Women’s and Reproductive Health Rheumatology Clinic at the University of Pittsburgh Medical Center, Pittsburgh. She was not involved with the research.

“This is a nice, relatively large study that’s demonstrating [that] if you actually treat the patient and treat them effectively, their time to pregnancy is lower,” she said.

Study Details

The analysis compared time to pregnancy between two cohorts of women with RA who aimed to become pregnant. Women were, on average, around 32 years old in both groups, and nearly 60% had not been pregnant before.

The first cohort was part of the Pregnancy-Induced Amelioration of RA (PARA) study, conducted by Erasmus University Medical Center from 2002 through 2010, in which patients were treated by their own rheumatologists with standard-of-care at the time. Of the 245 women included, 36% were on no medication, and one fourth were taking nonsteroidal anti-inflammatory drugs (NSAIDs). One third of patients were prescribed sulfasalazine, 6% were on hydroxychloroquine, and 4% were prescribed a tumor necrosis factor (TNF) inhibitor. Of the PARA patients prescribed prednisone, about half used a dose > 7.5 mg/d.

The second cohort was part of the Preconception Counseling in Active RA (PreCARA) study, conducted at Erasmus University Medical Center from 2012 to 2023. PreCARA patients were treated with the T2T approach aimed at remission/low disease activity and avoiding use of NSAIDs and high-dose prednisone (> 7.5 mg/d). Of the 215 women in the cohort, 69% were on sulfasalazine, 65% were on hydroxychloroquine, 53% were taking a TNF inhibitor, 45% took prednisone, and 13% took NSAIDs. For patients prescribed prednisone, 75% used a daily dose ≤ 7.5 mg/d. Only six patients were not taking any medication.

In the preconception period, the median Disease Activity Score in 28 joints using C-reactive protein was 2.33 in the PreCARA cohort and 3.84 in the PARA cohort.

The median time to pregnancy was 84 days in the PreCARA cohort compared with 196 days in the PARA cohort. Compared with 42% of women in the PARA cohort, less than a quarter of women in the PreCARA cohort did not conceive within 1 year of trying. There was no difference between the two groups in the use of assisted reproductive techniques.

In an additional analysis, Dolhain and colleagues found that time to pregnancy in the PreCARA cohort was most associated with maternal age and nulliparity.

“You also will find [this association] in every cohort in time to pregnancy, and it underscores the robustness of our data,” Dolhain said. “We didn’t find any association [with time to pregnancy] anymore with disease activity, the use of NSAIDs, and the use of prednisone.”

Study ‘Will Make Patients Feel More Confident in Their Decisions’

Discussions about continuing medication before and during pregnancy can be a “tension point” for some patients, Talabi said, and these types of studies provide further evidence to reassure patients that this approach can help them reach their reproductive goals.

The study is “very clinically translatable, where you can show [patients] the benefit of continuing their medications” in the preconception period and during pregnancy, added Catherine Sims, MD, a rheumatologist at Duke Health in Durham, North Carolina, who is focused on reproductive rheumatology and preventive health.

“What we try to drive home is that the health of the mother directly translates to the health of the pregnancy and that includes medications, and that is okay because now we have shown that pregnancies are safe while taking these medications,” she said. “I think [this study] will make patients feel more confident in their decisions, which is a big, important piece of it.”

Sims is a consultant for Amgen and conducted research funded by GlaxoSmithKline. Dolhain and Talabi had no relevant disclosures.