Table 1 Distribution of demographic and clinical characteristics among bladder cancer cases and controls from the Women's Health Initiative
|  | Cases (n = 412) | Controls (n = 424) |
|---|---|---|
WHI Arm (N, %) | ||
 OS | 213 (52%) | 218 (52%) |
 CT: HT and DM | 24 (6%) | 26 (6%) |
 CT: HT only | 55 (13%) | 56 (13%) |
 CT: DM only | 120 (29%) | 124 (29%) |
Age (N, %) | ||
  < 50–59 | 97 (24%) | 100 (24%) |
 60–69 | 194 (47%) | 203 (48%) |
 70–79+ | 121 (29%) | 121 (28%) |
Year of Enrollment (N, %) | ||
 1994 - 1995 | 105 (25%) | 109 (26%) |
 1996 | 125 (30%) | 127 (30%) |
 1997 | 114 (28%) | 116 (27%) |
 1998 | 68 (17%) | 72 (17%) |
DNA Extraction Method (N, %) | ||
 5-prime | 397 (96%) | 408 (96%) |
 Phenol | 15 (4%) | 16 (4%) |
Race/Ethnicity (N, %) | ||
 Asian/Pacific Islander | 4 (1%) | 12 (3%) |
 Black/African American | 24 (6%) | 40 (9%) |
 Hispanic | 7 (2%) | 16 (4%) |
 Non-Hispanic White | 375 (91%) | 349 (82%) |
 Other | 2 (< 1%) | 7 (2%) |
Smoking (N, %) | ||
 Never Smoked | 155 (38%) | 234 (55%) |
 Past Smoker | 204 (49%) | 172 (41%) |
 Current Smoker | 53 (13%) | 18 (4%) |
Pack-Years (N, %) | ||
 Never Smoker | 155 (38%) | 234 (55%) |
  > 0 - < 30 | 145 (35%) | 137 (32%) |
  ≥ 30 | 112 (27%) | 53 (13%) |