Table 1

Breakdown of retrieved trials by Therapeutic Area

Therapeutic Area
Total number of trials retrieved in search
Trials reporting interim analysis (with or without specification of a DMC)
Trials identified as having extended use of interim data or DMC recommendations with the potential to introduce bias

Total (N)
1772
586
28
Cardiovascular Disease (CVD)
494
209
11
Oncology (ONC)
387
136
11
Infection (INF)
271
93
2
Pediatrics (PED)
71
22
0
Obstetrics & Gynecology (OBGYN)
43
20
2
Neurology (NEURO)
50
17
1
Other
456
89
1

Tharmanathan et al. BMC Medical Research Methodology 2008 8:12   doi:10.1186/1471-2288-8-12