Table 1.

Search terms

Set	Terms
#1	“Africa”[Mesh]. OR Africa[all fields]. OR Algeria[all fields]. OR Angola[all fields]. OR Benin[all fields]. OR Botswana[all fields]. OR “Burkina Faso”[all fields]. OR Burundi[all fields]. OR “Cabo Verde”[all fields]. OR “Cape Verde”[all fields]. OR “Central African”[all fields]. OR Chad[all fields]. OR Comoros[all fields]. OR Congo[all fields]. OR “Cote d Ivoire”[all fields]. OR “Cote dIvoire”[all fields]. OR Congo[all fields]. OR Djibouti[all fields]. OR Egypt[all fields]. OR ” Guinea”[all fields]. OR Eritrea[all fields]. OR Ethiopia[all fields]. OR Gabon[all fields]. OR Gambia[all fields]. OR Ghana[all fields]. OR Guinea[all fields]. OR Kenya[all fields]. OR Lesotho[all fields]. OR Liberia[all fields]. OR Libya[all fields]. OR Libyan[all fields]. OR Madagascar[all fields]. OR Malawi[all fields]. OR Mali[all fields]. OR Mauritania[all fields]. OR Mayotte[all fields]. OR Morocco[all fields]. OR Mozambique[all fields]. OR Namibia[all fields]. OR Niger[all fields]. OR Nigeria[all fields]. OR Rwanda[all fields]. OR Sahel[all fields]. OR “Sao Tome and Principe”[all fields]. OR Senegal[all fields]. OR “Sierra Leone”[all fields]. OR Somalia[all fields]. OR “South Africa”[all fields]. OR “South Sudan”[all fields]. OR Sudan[all fields]. OR Swaziland[all fields]. OR Tanzania[all fields]. OR Togo[all fields]. OR Tunisia[all fields]. OR Uganda[all fields]. OR Sahara[all fields]. OR Zambia[all fields]. OR Zimbabwe[all fields].
#2	“Oxygen Inhalation Therapy”[Mesh]. OR “Oxygen/supply and distribution”[Mesh:NoExp]. OR “Oxygen/therapeutic use”[Mesh:NoExp]. OR (oxygen[tiab]. AND (domiciliary[tiab]. OR home[tiab]. OR therapy[tiab]. OR delivery[tiab]. OR distribution[tiab]. OR supply[tiab]. OR concentrator*[tiab]. OR cylinder*[tiab]. OR tank*[tiab].))
#3	#1 AND #2
#4	(randomized controlled trial[pt]. OR controlled clinical trial[pt]. OR randomized[tiab]. OR randomised[tiab]. OR randomization[tiab]. OR randomisation[tiab]. OR placebo[tiab]. OR randomly[tiab]. OR trial[tiab]. OR study[tiab]. OR groups[tiab]. OR Clinical trial[pt]. OR “clinical trial”[tiab]. OR “clinical trials”[tiab]. OR “evaluation studies”[Publication Type]. OR “evaluation studies as topic”[MeSH Terms]. OR “evaluation study”[tiab]. OR evaluation studies[tiab]. OR “intervention study”[tiab]. OR “intervention studies”[tiab]. OR “case-control studies”[MeSH Terms]. OR “case-control”[tiab]. OR “cohort studies”[MeSH Terms]. OR cohort[tiab]. OR “longitudinal studies”[MeSH Terms]. OR “longitudinal”[tiab]. OR longitudinally[tiab]. OR “prospective”[tiab]. OR prospectively[tiab]. OR “retrospective studies”[MeSH Terms]. OR “retrospective”[tiab]. OR observational[tiab]. OR “follow up”[tiab]. OR “comparative study”[Publication Type]. OR “comparative study”[tiab]. OR systematic[subset]. OR “meta-analysis”[Publication Type]. OR “meta-analysis as topic”[MeSH Terms]. OR “meta-analysis”[tiab]. OR “meta-analyses”[tiab].) NOT (Editorial[ptyp]. OR Letter[ptyp]. OR Case Reports[ptyp]. OR Comment[ptyp].) NOT (animals[mh]. NOT humans[mh].)
#5	#4 AND #3