Development and validation of a search filter to identify equity-focused studies: reducing the number needed to screen

Table 1 Categories populated by terms included in detailed search strategies

PROGRESS heading	No. reviews published in 2017 contributing terms	Further terms needed?	No. reviews published in 2016 contributing terms	Cum. no. reviews contributing terms	Further terms needed?	Reviews included after targeted searches (2012-2015)	Cum. no. reviews contributing terms	Reviews contributing terms
‘Place’ Place of residence	5	No	-	5	No	-	5	[10,11,12,13,14]
‘Race’ Race / ethnicity / culture / language	3	Yes →	6	9	No	-	9	[11, 15,16,17,18,19,20,21,22]
Occupation	6	No	-	6	No	-	6	[11], [13], [16], [23], [24], [25]
‘Gender’ Gender / sex	1	Yes →	6	7	No	-	7	[16], [17], [18], [19], [26], [27], [28]
Religion	0	Yes →	1	1	Yes →	2	3	[17, 29, 30]
Education	7	No	-	7	No	-	7	[11, 13, 16, 24, 25, 31, 32]
‘SES’ Socio-economic status	12	No	-	12	No	-	12	[11], [13], [15], [23], [24], [25], [31], [32], [33], [34], [35], [36]
Social capital	0	Yes →	1	1	Yes →	4	5	[17, 37,38,39,40]
Other category not encompassed by PROGRESS-Plus	6	No	-	6	No	-	6	[11, 15, 16, 35, 36, 41]

ISSN: 1471-2288