Table 2.

Key concepts and search terms identified for the search

Concept	Search terms
Inpatient services that can be considered to form part of critical care provision	Critical care: Critical care, emergency care, critical emergency care, essential emergency and critical care, intensive care, essential critical care, early goal directed therapy, neonatal, acute care, emergency medicine, trauma, emergency medical services, ICU, perioperative care, maternal emergencies, cardiovascular/inotropic support, renal support General inpatient care: General ward care, general inpatient care, general care, hospital care Oxygen therapy: Oxygen therapy/provision, artificial ventilation, mechanical ventilation non-invasive ventilation, continuous positive airway pressure, high flow (nasal) oxygen
Critical illness	Critical illness: Critical illness, sick children, acute paediatrics, emergency obstetric care, polytrauma, severe illness, life-threatening illness, acute illness, emergency illness Leading causes of mortality in Tanzania: HIV, malaria, TB, sepsis, trauma, burns, pneumonia, emergency surgery, shock, haemorrhage, respiratory failure, coma, unconsciousness, meningitis, choking, anuria, acute kidney injury
Resource use	Cost, expen, spending, invest Financ-, financial burden, financial impact, financial consequence, economic, economic burden, economic impact, economic consequence Direct cost, indirect cost, medical cost, non-medical cost, nonmedical cost, opportunity cost Resource, resource use, resource utilisation, resource utilisation, health service use, health service utilisation, health service utilisation Provider cost, health system cost, hospital cost, system cost, provider cost, hospital cost, societal cost, insurance, reimburs, cost of illness, cost analysis, economic modelling
Tanzania	Tanzania

ICU, intensive care unit; TB, tuberculosis.