| Factor Impacting Reliability |
Number of Tests (%) |
| Tests taken in patients loaded with clopidogrel or at steady-state |
53 (56%) |
| Tests taken when clopidogrel was being held to assess for surgery or reason for bleeding |
27 (28%) |
| Tests taken in patients not at steady-state |
9 (9%) |
| Tests taken when platelet function had not recovered from interfering agentsa |
6 (6%) |
| Tests taken in thrombocytopenic patientsb |
1 (1%) |
| Tests taken in patients with inherited platelet disorders |
0 (0%) |
| Tests taken appropriately |
80 (84%) |
a. Abciximab within the past 14 days, eptifibitide or tirofiban within the past 48
hours, or cilostazol within the past 12 hours before testing