Table 1. Characteristics of the Studies Selected (N = 400).

Characteristics	n (%)
Funding (n = 400) *
Industry	247 (61.7)
Non-industry	106 (26.5)
Blended	47 (11.8)
Study Phase (n = 400) *
Phase 2	209 (52.3)
Phase 3	130 (32.5)
Phase 4	61 (15.2)
Gender (n = 400) *
Both	356 (89.0)
Female only	31 (7.7)
Male only	13 (3.3)
Age Group (n = 400)
Adult only	332 (83.0)
Child involved	68 (17.0)
Randomization (n = 399) **
Randomized	271 (67.9)
Not randomized	128 (32.1)
Investigator (n = 400)
Non-academia	238 (59.5)
Academia	162 (40.5)
Number of Study Subjects (n = 389) **
Median	98
Mean (SD)	249 (452)
Range	1–5993
Study length (days) (n = 400)
Median	639
Mean (SD)	874 (817)
Range	29–6908

*Phase 3 and 4 were aggregated as “phase 3/4”, non-industry funded and blended studies were aggregated as “non-industry or blended” and female only and male only were aggregated as “male or female only” in the analysis.

**Some data were missing in CTG registry and the total number did not sum up 400.