Table 1 Baseline characteristics of study population
| Characteristics |
All n (%) or mean ± SD |
Non-persistent (< 6 months) n (%) or mean ± SD |
Persistent (≥ 6 months) n (%) or mean ± SD | p value |
|---|---|---|---|---|
| Total | 887 (100%) | 321 (100%) | 566 (100%) | |
| Sex | 0.889 | |||
| Male | 373 (42.1%) | 134 (41.7%) | 239 (42.2%) | |
| Female | 514 (57.9%) | 187 (58.3%) | 327 (57.8%) | |
| Age (years) | 80.5 ± 3.7 | 81.0 ± 3.8 | 80.2 ± 3.6 | 0.007 |
| 75-79 | 489 (55.1%) | 155 (48.3%) | 334 (59.0%) | |
| 80-84 | 262 (29.6%) | 106 (33.0%) | 156 (27.6%) | |
| ≥ 85 | 136 (15.3%) | 60 (18.7%) | 76 (13.4%) | |
| Household income | 0.046 | |||
| Low | 256 (28.8%) | 135 (42.0%) | 287 (50.7%) | |
| Middle | 209 (23.6%) | 83 (25.9%) | 126 (22.3%) | |
| High | 422 (47.6%) | 103 (32.1%) | 153 (27.0%) | |
| Residential area | 0.191 | |||
| Urban | 722 (81.4%) | 254 (79.1%) | 468 (82.7%) | |
| Rural | 165 (18.6%) | 67 (20.9%) | 98 (17.3%) | |
| Type of health insurance | 0.423 | |||
| Medicare | 805 (90.8%) | 288 (89.7%) | 517 (91.3%) | |
| Medical aid | 82 (9.2%) | 33 (10.3%) | 49 (8.7%) | |
| Charlson comorbidity index | 0.009 | |||
| 1-2 | 420 (47.3%) | 143 (44.6%) | 277 (48.9%) | |
| 3-5 | 415 (46.8%) | 149 (46.4%) | 266 (47.0%) | |
| ≥ 6 | 52 (5.9%) | 29 (9.0%) | 23 (4.1%) | |
| Number of prescribed medications | 0.009 | |||
| < 4 | 154 (17.4%) | 68 (21.2%) | 86 (15.2%) | |
| 4-7 | 566 (63.8%) | 184 (57.3%) | 382 (67.5%) | |
| ≥ 8 | 167 (18.8%) | 69 (21.5%) | 98 (17.3%) | |
| Mean duration of antiplatelets (days) | 465.8 ± 372.5 | 47.8 ± 55.4 | 703.0 ± 245.4 | 0.000 |