Table 1.
Aspirin-treated osteoarthritis subcohort. SMD: standardized mean difference.
| Before propensity matching | After propensity matching | ||||
|---|---|---|---|---|---|
| Aspirin | Control | SMD | Control | SMD | |
| n | 1133 | 23655 | - | 1133 | - |
| Age | 67.5 ± 12.0 | 61.4 ± 14.1 | 0.465 | 67.9 ± 11.9 | 0.035 |
| BMI | 32.1 ± 8.4 | 32.4 ± 8.2 | 0.037 | 32.2 ± 8.4 | 0.016 |
| Charlson | 2.55 ± 2.71 | 1.87 ± 2.47 | 0.264 | 2.53 ± 2.85 | 0.007 |
| Race | |||||
| - African American | 307 (27.2%) | 5069 (21.4%) | 271 (24.0%) | ||
| - Asian | 21 (1.9%) | 360 (1.5%) | 19 (1.7%) | ||
| - Pacific Islander | 1 (0.1%) | 23 (0.1%) | 0 | ||
| - White | 715 (63.3%) | 15900 (67.2%) | 752 (66.6%) | ||
| - Other | 10 (0.9%) | 289 (1.2%) | 14 (1.2%) | ||
| - Unknown | 75 (6.6%) | 2018 (8.5%) | 73 (6.5%) | ||
| Ethnicity | |||||
| - Hispanic or Latino | 81 (7.2%) | 1897 (8.0%) | 84 (7.4%) | ||
| - Not Hispanic or Latino | 1018 (90.2%) | 21145 (89.4%) | 1013 (89.7%) | ||
| - Unknown | 30 (2.7%) | 617 (2.6%) | 32 (2.8%) | ||
| Sex | |||||
| - Female | 591 (52.3%) | 14348 (60.6%) | 599 (53.1%) | ||
| - Male | 538 (47.7%) | 9310 (39.4%) | 530 (46.9%) | ||
| - Other | 0 (0.0%) | 1 (0.0%) | 0 | ||
| Smoking status | |||||
| - Current or Former | 142 (12.6%) | 2746 (11.6%) | 135 (12.0%) | ||
| - Non smoker | 987 (87.4%) | 20913 (88.4%) | 994 (88.0%) | ||
| Severity Type | |||||
| - Mild | 245 (21.7%) | 13806 (58.4%) | 576 (51.0%) | ||
| - Mild ED | 73 (6.5%) | 2463 (10.4%) | 109 (9.7%) | ||
| - Moderate | 621 (55.0%) | 5879 (24.8%) | 337 (29.8%) | ||
| - Severe | 66 (5.8%) | 523 (2.2%) | 23 (2.0%) | ||
| - Mortality/hospice | 124 (11.0%) | 988 (4.2%) | 84 (7.4%) | ||