Table 2.
Magnitude of platelet reactivity
| Magnitude of platelet reactivity in the elderly | |||||
|---|---|---|---|---|---|
| <75 year (n = 815) | ≥75 year (n = 136) | p value | After adjustment | ||
| Difference | p value | ||||
| LTA 20 ADP | 57.2 ± 14.5 | 59.7 ± 13.8 | 0.047 | 2.10 | 0.11 |
| LTA 5 ADP | 39.3 ± 14.5 | 43.1 ± 14.4 | 0.0046 | 3.3 | 0.01 |
| PRU | 202.9 ± 74.9 | 233.5 ± 75.2 | <0.0001 | 25.9 | 0.0001 |
| PFA COL/ADP | NA | NA | 0.008 | NA | 0.008 |
| Magnitude of platelet reactivity in patients with a history of a cerebrovascular event | |||||
| No TIA/stroke (n = 937) | Previous TIA/stroke (n = 14) | p value | After adjustment | ||
| Difference | p value | ||||
| LTA 20 ADP | 57.4 ± 14.4 | 67.0 ± 11.3 | 0.007 | 8.46 | 0.03 |
| LTA 5 ADP | 39.7 ± 14. 6 | 48.8 ± 10. 6 | 0.007 | 8.46 | 0.03 |
| PRU | 206.8 ± 75.6 | 245.5 ± 71. 5 | 0.07 | 37.4 | 0.06 |
| PFA COL/ADP | NA | NA | 0.09 | NA | 0.11 |
| Magnitude of platelet reactivity in patients with a low body weight | |||||
| ≥60 kg (n = 921) | <60 kg (n = 30) | p value | After adjustment | ||
| Difference | p value | ||||
| LTA 20 ADP | 57.7 ± 14.3 | 51.6 ± 15.8 | 0.046 | −7.2 | 0.007 |
| LTA 5 ADP | 39.9 ± 14.5 | 37.7 ± 15.4 | 0.45 | −3.9 | 0.16 |
| PRU | 207.7 ± 75.1 | 198.7 ± 91.4 | 0.61 | −28.1 | 0.04 |
| PFA COL/ADP | NA | NA | 0.87 | NA | 0.76 |
LTA light transmittance aggregometry, NA not applicable, PRU P2Y12 reaction units, PFA COL/ADP platelet function analyser using the collagen/ADP cartridge