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Table 1 Numbers of trials by number of participants and trial design (RCT or Non-RCT)

From: How Can the Evidence from Global Large-scale Clinical Trials for Cardiovascular Diseases be Improved?

Number of participants

Number of trials

Proportion of RCT (%)

 

RCT

Non-RCT

Total

 

≥100,000

0

2

2

(0.6%)

0

30,000-99,999

2

4

6

(1.7%)

33.3

10,000-29,999

37

5

42

(12.2%)

88.1

3,000-9,999

56

12

68

(19.8%)

82.4

1,000-2,999

72

33

105

(30.5%)

68.6

< 999

76

45

121

(35.1%)

62.8

Total

243

101

344

(100%)

70.6

  1. RCT: randomized controlled trial; Non-RCT: non-randomized controlled trial