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. 2018 Sep 12;362:k3218. doi: 10.1136/bmj.k3218

Table 1.

Characteristics of included trials

Variables No (%)
Total cohort (31 818 trials) Cohort with results due (7274 trials)
Results available 9876 (31.0) 3601 (49.5)
Completion year:
 2004 4 (0.0) 3 (0.0)
 2005 100 (0.3) 72 (1.0)
 2006 475 (1.5) 276 (3.8)
 2007 762 (2.4) 444 (6.1)
 2008 1121 (3.5) 658 (9.1)
 2009 1123 (3.5) 654 (9.0)
 2010 1143 (3.6) 699 (9.6)
 2011 1204 (3.8) 731 (10.1)
 2012 1137 (3.6) 713 (9.8)
 2013 1258 (4.0) 737 (10.1)
 2014 1251 (3.9) 803 (11.0)
 2015 1210 (3.8) 782 (10.8)
 2016 1180 (3.7) 702 (9.7)
 2017 1015 (3.2) -
 2018 4 (0.0) -
 Missing 18 831 (59.2) -
Trial status:
 All countries, ongoing 12 947 (40.7) -
 All countries, complete or terminated 11 531 (36.2) 7274 (100.0)
 Any countries, complete or terminated 5754 (18.1) -
 Other (eg, suspended) 519 (1.6) -
 Blank 1067 (3.4) -
Phase:
 Discordant between countries 398 (1.3) 83 (1.1)
 I 1569 (4.9) 23 (0.3)
 II 12 191 (38.3) 3247 (44.6)
 III 10 282 (32.3) 2340 (32.2)
 IV 7378 (23.2) 1581 (21.7)
Sponsor class:
 Non-commercial 14 408 (45.3) 2353 (32.4)
 Commercial 16 964 (53.3) 4837 (66.5)
 Mixed 265 (0.8) 57 (0.8)
 Blank 181 (0.6) 27 (0.4)
Part of paediatric investigation plan 1042 (3.3) 107 (1.5)
Condition being studied is rare disease:
 No 27 496 (86.4) 6584 (90.5)
 Yes 3723 (11.7) 584 (8.0)
 Discordant between countries 382 (1.2) 45 (0.6)
 Data not available 217 (0.7) 61 (0.8)
Bioequivalence study:
 No 31 738 (99.8) 7264 (99.9)
 Yes 66 (0.2) 9 (0.1)
 Discordant between countries 14 (0.0) 1 (0.0)
Participants are healthy volunteers:
 No 29 132 (91.6) 6555 (90.1)
 Yes 2638 (8.3) 708 (9.7)
 Discordant between countries 48 (0.2) 11 (0.2)
Total No of trials registered for trial’s sponsor:
 First quarter (1-10) 8146 (25.6) 1907 (26.2)
 Second quarter (11-53) 7971 (25.1) 1677 (23.1)
 Third quarter (54-244) 7953 (25.0) 1547 (21.3)
 Fourth quarter (274-1260) 7748 (24.4) 2143 (29.5)
No sponsor name given 145 (0.5) 18 (0.3)
Unclear sponsor name given 227 (0.7) 66 (0.9)
All sites terminated 2155 (6.8) 1062 (14.6)
No of countries:
 1 20 476 (64.4) 4536 (62.4)
 2 2611 (8.2) 941 (12.9)
 ≥3 8731 (27.4) 1797 (24.7)
Trial has multiple sponsors 982 (3.1) 145 (2.0)