Policies increasing access to immediate postpartum long-acting reversible contraception (LARC) were associated with reductions in preterm birth and low birth weight, based on data from South Carolina’s Medicaid program.
Preterm birth and low birth weight represent the second-leading cause of infant mortality in the United States, wrote Maria W. Steenland, SD, of Brown University, Providence, R.I., and colleagues. Previous policy interventions to reduce preterm birth and low birth weight have focused on services before and during pregnancy, they said. LARC is a safe and effective postpartum intervention, but cost has been a limiting factor, they noted.
In 2012, the Medicaid program in South Carolina began reimbursing hospitals for immediate postpartum LARC independent of global maternity payments. In a previous study, the researchers found that the implementation of this policy had reduced the number of short-interval births among adolescents.
The goal of the current study, published in JAMA Pediatrics, was to analyze the association between South Carolina’s policy change and rates of preterm birth and low birth weight among individuals with Medicaid coverage during childbirth. The researchers analyzed data from 186,953 Medicaid-paid births between January 2009 and December 2015 in South Carolina. Of these, 46,414 births (24.8%) occurred in hospitals that provided immediate postpartum LARC in response to the policy change. Overall, the implementing hospitals had more annual births paid for by Medicaid compared to nonimplementing hospitals (1,105 vs. 511) and were less likely to be rural (33.3% vs. 46.8%) and had a greater share of preterm births (15.5% vs. 9.5%). Prior to the policy change, the probability of a preterm birth in the next 4 years was 4.4% for patients at implementing hospitals and 3.5% for those in nonimplementing hospitals, and the probability of a low-birth-weight birth was 3.6% and 2.9%, respectively.
The policy change was associated with a decrease of 0.4 percentage points for preterm birth and 0.3 percentage points for subsequent low-birth-weight birth.
When the results were stratified based on race and ethnicity, the policy change was associated with a decrease of 0.5 percentage points in the probability of preterm birth in both non-Hispanic Blacks and non-Hispanic Whites. No significant differences appeared in the association between the policy change and rates of preterm birth or low-birth-weight birth between non-Hispanic Black and non-Hispanic White individuals.
However, the policy was associated with a significant decrease of 0.6 percentage points in the probability of short-interval birth among non-Hispanic Blacks, and a decrease of 1.6 percentage points in the probability of another birth within 4 years overall. The policy change also was associated with a significant increase of 27 days between births among non-Hispanic Blacks, but not with any significant change among non-Hispanic Whites or the study population overall.
“In addition, although our data cannot speak to this, the policy may have affected the intendedness of subsequent pregnancies, leading to healthier behaviors before and during pregnancy, such as early initiation of prenatal care,” the researchers wrote in their discussion of the findings.
The study findings were limited by several factors including the lack of data on pregnancy intention or abortion, and the lack of data on patient-reported outcomes, notably the provision of patient-centered counseling and whether such counseling was biased, the researchers noted. Other limitations included a lack of data on infant mortality and potential confounding from risk profiles of patients in implementing vs. nonimplementing hospitals, they wrote.
Also, the study provides population-level data, which does not guide clinical decision-making about intervals between childbirth and subsequent pregnancy, the researchers emphasized.
Although the data support the value of postpartum contraception in improving birth outcomes, “it is imperative that efforts to expand access focus on assuring comprehensive access to all forms of contraception without coercion,” the researchers concluded. “Additional policy solutions are needed to improve infant health, including those that directly address structural and interpersonal racism to reduce racial disparities in infant health,” they said.
The study is important because, although immediate postpartum LARC policies were first implemented almost a decade ago in the United States, population-level evidence on the effects of these policies remains scarce, Dr. Steenland said in an interview.
Existing barriers to improving access to immediate postpartum LARC include health professional training and logistics within hospitals, as well as ensuring correct billing and timely reimbursements, Dr. Steenland said. “Simple and clear billing procedures, and advanced reimbursement so that hospitals can have devices stocked would make it easier to provide this service,” she noted.
“This service has gone from being almost completely unavailable, to available in some hospitals, mainly those that are urban, teaching, and high volume,” said Dr. Steenland. “Additional research is needed to determine how health systems can make this service available to all birthing persons,” she said. “Also, critically, additional research is needed to identify strategies to ensure that counseling for immediate postpartum LARC, and family planning more generally, is patient-centered, so that the availability of immediate postpartum LARC increases, rather than restricts, choice,” she added. “Finally, additional research is needed to determine whether postpartum people have affordable and accessible access to LARC removal services,” Dr. Steenland emphasized.