Table.
Comparison of patient demographics, comorbidities, and preoperative risk factors among antiplatelet treatment groups
| No antiplatelet agent n/total (%) |
ASA only n/total (%) | Clopidogrel only n/total (%) |
ASA and clopidogrel n/total (%) |
P value | |
|---|---|---|---|---|---|
| Patient characteristics | |||||
| Male gender | 1353/2013 (67) | 4720/7137 (66) | 141/229 (62) | 681/1016 (67) | .338 |
| White race | 1988/2011 (99) | 7053/7128 (99) | 224/228 (98) | 1004/1014 (99) | .757 |
| Age | |||||
| Less than 40 years | 9/2013 (0.5) | 10/7139 (0.1) | 0/229 (0) | 1/1017 (0.1) | <.001 |
| Age 40–49 | 84/2013 (4) | 180/7139 (3) | 12/229 (5) | 30/1017 (3) | |
| Age 50–59 | 282/2013 (14) | 947/7139 (13) | 27/229 (12) | 163/1017 (16) | |
| Age 60–69 | 535/2013 (27) | 2205/7139 (31) | 59/229 (26) | 309/1017 (30) | |
| Age 70–79 | 733/2013 (36) | 2682/7139 (38) | 89/229 (39) | 370/1017 (36) | |
| Age 80–89 | 349/2013 (17) | 1069/7139 (15) | 40/229 (17) | 139/1017 (14) | |
| Age 90 or greater | 21/2013 (1) | 46/7139 (0.6) | 2/229 (0.9) | 5/1017 (0.5) | |
| Smoking (prior or current) |
1666/2010 (83) | 5954/7130 (84) | 187/229 (82) | 829/1012 (82) | .532 |
| Hypertension | 1622/2013 (81) | 6170/7134 (86) | 199/229 (87) | 921/1017 (91) | <.001 |
| Diabetes | 654/2013 (32) | 2341/7138 (33) | 89/229 (39) | 378/1017 (37) | .010 |
| Beta blockers | 1534/2011 (76) | 6060/7135 (85) | 181/229 (79) | 896/1017 (88) | <.001 |
| Coronary disease | 528/2012 (26) | 2528/7135 (35) | 84/229 (37) | 509/1015 (50) | <.001 |
| CABG/PTCA | 417/2012 (21) | 2305/7136 (32) | 76/228 (33) | 485/1017 (48) | <.001 |
| Congestive heart failure |
209/2012 (10) | 721/7137 (10) | 22/229 (10) | 130/1017 (13) | .071 |
| COPD | 640/2013 (32) | 1953/7137 (27) | 66/229 (29) | 305/1016 (30) | <.001 |
| Dialysis | 89/2013 (4) | 161/7138 (2) | 6/229 (3) | 22/1017 (2) | <.001 |
| Creatinine ≥1.8% | 201/1941 (10) | 585/6959 (8) | 25/223 (11) | 75/988 (8) | .014 |
| Stress test | |||||
| Not done | 1188/1994 (60) | 3959/7088 (56) | 135/228 (59) | 627/1008 (62) | <.001 |
| Normal result | 607/1994 (30) | 2171/7088 (31) | 72/228 (32) | 225/1008 (22) | |
| Abnormal result | 199/1994 (10) | 958/7088 (14) | 21/228 (9) | 156/1008 (15) | |
| Statin | 979/2013 (49) | 5087/7136 (71) | 153/229 (67) | 810/1016 (79) | <.001 |
ASA, Aspirin; CABG, coronary artery bypass grafting; COPD, chronic obstructive pulmonary disease; PTCA, percutaneous transluminal coronary angioplasty.