Table I.
Baseline patient demographics and characteristics, by aspirin use status.
| All participants (n=128,512) | Aspirin non-users (n=115,749) | Aspirin users (n=12,763) | |
|---|---|---|---|
| Age, n (%) | |||
| <60 | 45,993 (36) | 43,014 (37) | 2,979 (23) |
| 60–69 | 57,417 (45) | 51,096 (44) | 6,321 (50) |
| ≥70 | 25,102 (20) | 21,639 (19) | 3,463 (27) |
| Race/Ethnicity, n (%) | |||
| White/Other | 117,365 (91) | 105,163 (91) | 12,202 (96) |
| Black/African American | 11,147 (9) | 10,586 (9) | 561 (4) |
| BMI, median (IQR) | 27 (24, 31) | 27 (24, 31) | 27 (24, 31) |
| Systolic blood pressure, median (IQR) | 125 (114, 138) | 125 (114, 137) | 128 (117, 140) |
| Treatment for hypertension, n (%) | 27,896 (22) | 24,143 (21) | 3,753 (29) |
| Diabetes mellitus, n (%) | 6,179 (5) | 5,486 (5) | 693 (5) |
| Current smoking, n (%) | 8,759 (7) | 8,063 (7) | 696 (6) |
| CVD risk (%), median (IQR) | 10 (6, 15) | 9 (6, 15) | 11 (8, 17) |
| CVD risk, n (%) | |||
| Low/normal | 67,600 (53) | 62,239 (54) | 5,361 (42) |
| High | 60,912 (47) | 53,510 (46) | 7,402 (58) |
| Family history of CRC, n (%) | 19,133 (15) | 17,113 (15) | 2,020 (16) |
| History of colonoscopy, n (%) | 60,532 (47) | 53,691 (46) | 6,841 (54) |
| History of polypectomy, n (%) | 9,896 (8) | 8,754 (8) | 1,142 (9) |
BMI: Body mass index; IQR: interquartile range; CVD: cardiovascular disease; CRC: colorectal cancer.