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Table 2 Results of study characteristics

From: Analysis and reporting of stratified cluster randomized trials—a systematic survey

Characteristics

Number of studies included; n = 185

Publication year; n (%)

 Before 2000

7 (4)

 Between 2001 and 2010

30 (16)

 Between 2011 and 2019

148 (80)

Center of study; n (%)

 One

89 (48)

 Two

44 (24)

 Three or more

52 (28)

Country of the study; n (%)

 UK

32 (17)

 USA

26 (14)

 Canada

8 (4)

 India

7 (4)

 Australia

15 (8)

 Denmark

7 (4)

 Germany

5 (3)

 Netherlands

6 (3)

 South Africa

8 (4)

 Others

71 (39)

Clinical area; n (%)

 Child development

36 (19)

 Primary care

27 (15)

 Maternal and child health

16 (9)

 HIV

12 (6)

 Cancer

9 (5)

 Malaria

9 (5)

 Cardiovascular

5 (3)

 Cognitive and mental health

10 (5)

 Others

61 (33)

Setting of the study; n (%)

 School

36 (19)

 General practice/primary care

38 (21)

 Community

36 (19)

 Hospital

18 (10)

 Village

10 (5)

 Family

6 (3)

 Others

41 (22)

Design of the study; n (%)

 Parallel

165 (89)

 Cross-over

2 (1)

 Stepped wedge

3 (2)

 Factorial

7 (4)

 Matched pair

6 (3)

 Split-plot

1 (1)

 Zelen design

1 (1)

Arm of the study; n (%)

 2

140 (76)

 3

28 (15)

 4

14 (8)

 5

2 (1)

 6 or more

1 (1)