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. 2020 May 17;73(1):13–17. doi: 10.1016/j.jvs.2020.04.503

Table III.

Type of study listed on clinical trials registry (www.clinicaltrials.gov)

Type Frequency %
Left blank 17 13.7
Behavioral 1 0.8
Biologic 15 12.1
Combination product 1 0.8
Device 2 1.6
Diagnostic test 4 3.2
Drug 67 54.0
Other 16 12.9
Procedure 1 0.8
Total 124