Table 2.

Previous experience with clinical research and preferences for future clinical research

Type of clinical research	Previous clinical research n = 159 (%)	Preferable future clinical research n = 1112 (%)
A single type of research
Observational study	38 (23.9)	156 (14.0)
Survey	68 (42.8)	505 (45.4)
Specimen collection	11 (6.9)	69 (6.2)
Two types of research
Observational study, survey	32 (20.1)	259 (23.3)
Observational study, specimen collection	1 (0.6)	30 (2.7)
Survey, specimen collection	6 (3.8)	24 (2.2)
Three types of research
Observational study, survey, specimen collection	3 (1.9)	69 (6.2)