Table 3.

Characteristics of SELECT sites with participants included in the retention analysis

N%
Number of sites417100%
Site characteristics
 Type of site
  VA4511%
  CCOP12630%
  Other24659%
 Total accrual
  <10033480%
  100–4997217%
  ≥500113%
 Percent African American accrual at site
  <5%19747%
  5–19%12430%
  ≥20%9623%
 Site participated in ancillary studiesa
  Yes36287%
  No5513%
 Number of training workshops missed by site staffb
  0, 1, or 211728%
  3 or 47718%
  5 or more22353%
 Site ever received a SELECT R&A grantc
  Yes12730%
  No29070%
  • aSite registered at least one participant to a SELECT ancillary study.

  • bStaff were required to attend SELECT training workshops, held every 6 months.

  • cSELECT R&A grants were available to all sites via an application process, for study-related activities.