From: Allopurinol and the risk of stroke in older adults receiving medicare
 | All | Incident stroke during follow up | P-value | |
---|---|---|---|---|
No | Yes | |||
Total, N (episodes) | 28,488 | 26,311 | 2,177 | Â |
 Age | 76.5 (7.4) | 76.4 (7.4) | 78.1 (7.3) | <0.0001 |
Gender, N (%) | Â | Â | Â | <0.0001 |
 Male | 14,163 (49.7) | 13,185 (50.1) | 978 (44.9) |  |
 Female | 14,325 (50.3) | 13,126 (49.9) | 1,199 (55.1) |  |
Race/Ethnicity, N (%) | Â | Â | Â | 0.0004 |
 White | 22,627 (79.4) | 20,970 (79.7) | 1,657 (76.1) |  |
 Black | 3,371 (11.8) | 3,049 (11.6) | 322 (14.8) |  |
 Hispanic | 589 (2.1) | 538 (2.0) | 51 (2.3) |  |
 Asian | 1,236 (4.3) | 1,134 (4.3) | 102 (4.7) |  |
 Native American | 92 (0.3) | 83 (0.3) | 9 (0.4) |  |
 Other/unknown | 573 (2.0) | 537 (2.0) | 36 (1.7) |  |
Region, N (%) | Â | Â | Â | 0.013 |
 Northeast | 4,586 (16.6) | 4,224 (16.6) | 362 (17.3) |  |
 Midwest | 6,400 (23.2) | 5,958 (23.3) | 442 (21.1) |  |
 South | 11,405 (41.3) | 10,486 (41.1) | 919 (44.0) |  |
 West | 5,227 (18.9) | 4,859 (19.0) | 368 (17.6) |  |
Charlson- Romano comorbidity Index Score | 3.61 (3.22) | 3.56 (3.20) | 4.27 (3.39) | <0.0001 |