Socioeconomic Gradient in Health and Global Inequality (10A) Practice Test

A study of prenatal care in two cities found that the number of first-trimester visits increased with household income in both cities. City 1 had extensive public transit coverage; City 2 had limited transit and higher out-of-pocket transportation costs. The income gradient in early prenatal visits was steeper in City 2. Researchers noted that globally, similar gradients are often steeper in settings where basic infrastructure is unevenly distributed.

Which statement best explains the health disparities observed in this socioeconomic gradient?

In a middle-income country, researchers evaluated childhood stunting across wealth quintiles. Stunting prevalence decreased steadily from the poorest to the richest quintile. A new cash-transfer program targeted the poorest quintile, and after two years, stunting declined modestly in the poorest group but the overall gradient remained. Field reports suggested that food prices rose and that clean water access remained limited in poor rural areas. The researchers compared this to a lower-inequality country where cash transfers were paired with water and sanitation improvements and the gradient narrowed.

What conclusion is most consistent with the socioeconomic gradient illustrated?