Table 1.
Baseline patient characteristics.
| Asymptomatic (n=19) | Symptomatic (n=15) | P-value | |
|---|---|---|---|
| Mean age (SD) | 71(6.64) | 68(8.92) | 0.34* |
| Female (%) | 8(42) | 5(33) | 0.73 |
| Race | |||
| White (%) | 18(95) | 15(100) | >0.99 |
| BMI (SD) | 28.7(3.8) | 28.8(4.9) | 0.97* |
| Comorbidities | |||
| Remote TIA/stroke (%) | 2(11) | 2(13) | >0.99 |
| Peripheral arterial disease (%) | 7(37) | 2(13) | 0.24 |
| Prior myocardial infarction (%) | 2(11) | 2(13) | >0.99 |
| Prior coronary intervention (%) | 5(26) | 4(27) | >0.99 |
| Heart failure (%) | 3(16) | 1(7) | 0.61 |
| Hypertension (%) | 18(95) | 15(100) | >0.99 |
| Hyperlipidemia (%) | 18(95) | 12(80) | 0.29 |
| Diabetes mellitus (%) | 4(21) | 3(20) | >0.99 |
| Renal insufficiency, Cr≥2 (%) | 1(5) | 0(0) | >0.99 |
| Smoking status | |||
| Never (%) | 5(26) | 5(33) | >0.99 |
| Current (%) | 4(21) | 2(13) | 0.67 |
| Preoperative medications | |||
| Aspirin (%) | 17(89) | 14(93) | >0.99 |
| Clopidogrel (%) | 2(11) | 2(13) | >0.99 |
| Warfarin (%) | 2(11) | 1(7) | >0.99 |
| Low molecular weight heparin (%) | 1(5) | 1(7) | >0.99 |
| Statin (%) | 18(95) | 15(100) | >0.99 |
| Beta blocker (%) | 14(74) | 12(80) | >0.99 |
| ACE-inhibitor (%) | 9(47) | 8(53) | >0.99 |
| Preoperative internal carotid stenosis | |||
| Mean PSV, cm/s (SD) | 393(114) | 402(139) | 0.84* |
| Degree of internal carotid stenosis | 0.37 | ||
| <49% (%) | 0 | 0 | |
| 50-69% (%) | 2(11) | 4(27) | |
| 70-99% (%) | 17(89) | 11(73) | |
| Carotid disease symptomatology | |||
| Stroke (%) | -- | 2(13) | -- |
| Hemispheric TIA (%) | -- | 5(33) | -- |
| Amaurosis fugax (%) | -- | 8(53) | -- |
| Days from symptoms to CEA (IQR) | -- | 30(7-106) | -- |
SD, standard deviation; TIA, transient ischemic attack; Cr, creatinine; ACE, angiotensin-converting enzyme; PSV, peak systolic velocity; IQR, interquartile range
*
P-value obtained by Student's t-test due to normal distribution. Others obtained by non-parametric testing.