Table 2.

Baseline characteristics of SELECT participants included in the retention analysis, by race

White (n = 28,118)Black (n = 4,322)
N%N%
Demographic
 Age group (y)a
  50–541,37432%
  55–599,27133%1,24029%
  60–647,77628%80319%
  ≥6511,07139%90521%
 Ethnicity
  Hispanic5672%401%
  Not Hispanic27,32697%4,24498%
  Missing2251%381%
 Family history of prostate cancer
  Yes5,33319%72017%
  No22,75581%3,56783%
  Missing300%351%
 Living arrangements
  Alone3,26512%92321%
  With others24,70388%3,31377%
  Missing1501%862%
 Education level
  Up to high school graduate5,37019%1,24529%
  Vocational/some college7,30426%1,55636%
  College graduate/some graduate school8,11129%84620%
  Completed graduate school7,12525%58614%
  Missing2081%892%
Baseline comorbidity
 Smoking status
  Current1,6716%79818%
  Former14,29151%1,76141%
  Never12,07243%1,69939%
  Missing840%641%
 Cardiovascular health historyb
  Yes4,56016%57013%
  No23,54984%3,74987%
  Missing90%30%
 Diabetes
  Yes2,3418%74117%
  No25,76892%3,57883%
  Missing90%30%
 Hypertension
  Yes10,04536%2,31854%
  No18,06464%2,00146%
  Missing90%30%
Reasons for participating in SELECTc
 “May help others in the future”
  Yes25,39390%3,47880%
  No2,69310%80819%
  Missing320%361%
 “It may help me be healthier”
  Yes20,65173%3,25175%
  No7,43526%1,03524%
  Missing320%361%
 “It may prevent prostate cancer”
  Yes22,43380%3,47780%
  No5,65320%80919%
  Missing320%361%
 “My wife or others in my family want me to join”
  Yes4,19215%61414%
  No23,89485%3,67285%
  Missing320%361%
 “It makes me proud to be part of a study”
  Yes10,45337%1,56536%
  No17,63363%2,72163%
  Missing320%361%
 “It gives me a chance to see someone about my health”
  Yes7,86528%1,60937%
  No20,22172%2,67762%
  Missing320%361%
  • aWhite participants were eligible for SELECT at age 55 and older; Black participants were eligible at age 50 and older.

  • bA patient has a positive cardiovascular health history if he reported any of the following at baseline: embolism, thrombosis; TIA; stroke; CHF; arrhythmia; angina; MI; CABG; angioplasty.

  • cAll participants completed a form with the question, “Why have you chosen to be on this study?” Participants may have marked more than one response.