Public health care funding modifies the effect of out-of-pocket spending on maternal, infant, and child mortality.

Increased out-of-pocket (OOP) health care spending has been associated with increased maternal, infant, and child mortality, but the effect of public health care spending on mortality has not been studied. I identified a statistically significant interaction between public health care expenditure and OOP health care spending for maternal, infant, and child mortality. Generally, increases in public expenditure coincide with decreased rates of mortality, regardless of OOP spending levels. Specifically, higher levels of public expenditure with moderate levels of OOP spending may result in the lowest mortality rates. Increased public health care spending may improve health outcomes better than efforts to reduce OOP expenditure alone.