Understanding variation in catastrophic health expenditure from socio-ecological aspect: a systematic review.

Financial protection against CHE is one of the targets of sustainable development goal 3 and a tool to achieve universal health coverage. Each country has to formulate its policy and enact laws that consider its requirements to preserve health rights. That is why the community and policy-level predictors must be studied more intensively. Proper screening of the cause of CHE, especially from the perspective of the health care provider's perspective is required to identify the individual, organizational, community, and policy-level barriers in healthcare delivery.