Comparing mothers' postpartum concerns in two clinical trials 18 years apart.

The analysis included only 58 and 63 mothers from the intervention groups, not all mothers in the trials or all postpartum women. The two trials studied different populations: mostly African American mothers with high-risk pregnancies in 1997 and mostly Hispanic first-time mothers with limited health-care access in 2015. The mothers received different forms of advanced practice nurse care, including a postpartum home visit in 1997 but phone and text follow-up in 2015. The health-care financing and Medicaid access context changed between the two trials, so differences in concerns may reflect those changes rather than time alone. The outcome was content of interaction logs, coded as individual concerns, not a validated measure of how common each concern was among mothers. The paper does not report a control-group comparison of concerns because usual care groups had no routine recording of mothers' concerns.

Do not read the different concern counts as proof that postpartum concerns changed because of the 18-year gap. The two groups were different populations, received different nurse follow-up, and the analysis used only concerns recorded in intervention logs, not all mothers.