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Table 1 Characteristics of included studies

From: Reporting of health equity considerations in cluster and individually randomized trials

 Cluster RCTs
N = 100
Individually randomized trials
N = 100
Total
N = 200
(%)(%)N (%)
Publication year
 2013514596 (48)
 2014404989 (45)
 2015a9615 (8)
Study had an explicit objective pertaining to equity6455119 (60)
Study was reported as conducted in a resource-constrained settingb402262 (31)
Lower- or middle-income country281139 (20)
Public hospital123 (2)
Conflict zone101 (0.5)
Other131427 (14)
Study populationb
 Students in primary or secondary school271138 (19)
 Workers336 (3)
 Community members413677 (39)
 Patients194665 (33)
 Members of a particular professional group, such as health professionals or teachers314 (2)
 Other1111 (6)
Unit of randomization
 Individuals 100100 (50)
 Schools27 27 (14)
 Workplace3 3 (2)
 Community or community organization26 26 (13)
 Medical practice12 12 (6)
 Other32 32 (16)
Participants were recruited from:
 Workplace516 (3)
 School271037 (19)
 Other6889157 (79)
 Studies that reported using special or tailored recruitment to increase enrollment of individuals who are members of socially disadvantaged populations113243 (22)
Type of study
 Focused on socially disadvantaged group7879157 (79)
 Universal18725 (13)
 Both focused and universal41418 (9)
  1. aThe search was conducted on 5 May 2015
  2. bStudies could be classified as fitting more than one type of setting and more than one type of unit of randomization; therefore, numbers do not add up to 100. RCT randomized controlled trial