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Table 4 Number of participating countries by starting year of trials

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

Number of countries

Number of trials (N = 333*)

 

-2000

2001-2005

2006-2010

Total

Single country

19

73

135

227

(68.2%)

Multiple countries

16

40

50

106

(31.8%)

   2-5 countries

8

14

13

35

(10.5%)

   6-20 countries

7

10

20

37

(11.1%)

   > 20 countries

1

16

17

34

(10.2%)

  1. * 11 trials whose starting years or countries were unknown were excluded.
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BMC Research Notes

ISSN: 1756-0500

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