Table 1.
Baseline characteristics of patients across transport status
| Characteristics | Private Vehicle N (%) N = 138 |
EMS N (%) N = 60 |
Total N (%) N = 198 |
|---|---|---|---|
| Age: years, median (IQR) | 61 (53-69) | 60 (54-70) | 60 (53-70) |
| Sex: Female | 43 (31) | 11 (18) | 54 (27) |
| Race | |||
| White | 116 (84) | 45 (75) | 161 (81) |
| Black | 21 (15) | 14 (23) | 35 (18) |
| Other | 1 (1) | 1 (2) | 2(2) |
| Insurance | |||
| Private | 96 (87) | 29 (60) | 125 (79) |
| Public (Medicaid, Medicare, military, state) | 76 (55) | 46 (77) | 122 (62) |
| Medicare | 62 (61) | 30 (62) | 91 (46) |
| Medicaid | 14 (20) | 14 (32) | 28 (24) |
| Military | 1 (2) | 1 (2) | 2(2) |
| State | 0(0) | 1 (2) | 1 (1) |
| Uninsured | 10 (14) | 6(13) | 16 (13) |
| Medical History | |||
| Smoking | 56 (41) | 27 (45) | 83 (42) |
| Hypertension | 93 (67) | 49 (82) | 142 (72) |
| Diabetes mellitus | 44 (32) | 14 (23) | 58 (29) |
| Dyslipidemia | 82 (59) | 38 (63) | 120 (61) |
| Prior myocardial infarction | 33 (24) | 21 (35) | 58 (29) |
| Prior cardiac intervention | 51 (37) | 24 (40) | 75 (38) |
| Prior percutaneous cardiac intervention (PCI) | 38 (28) | 19 (32) | 57 (29) |
| Prior cardiac bypass surgery | 23 (17) | 10(17) | 33 (17) |
| Prior atrial fibrillation | 7(10) | 3(7) | 10(9) |
| Prior stroke | 10 (14) | 4(7) | 14(7) |
| Home aspirin use | 56 (41) | 24 (40) | 80 (40) |
| Home Clopidogrel use | 20 (14) | 9(15) | 29 (15) |
| Home Warfarin use | 11 (8) | 2(3) | 13(7) |
| Clinical Variables | |||
| Weekday/Business hour ED Arrival | 53 (38) | 17 (28) | 70 (35) |
| Emergent PCI, yes | 105 (76) | 50 (83) | 155 (78) |
| Stents implanted, yes | 93 (67) | 48 (80) | 141 (71) |
| Reperfusion candidate, yes | 103 (75%) | 50 (83%) | 153 (77%) |
| Door-to-balloon time, business hours, min, median (IQR) | 62 (50-74) | 50 (42-61) | |
| Door-to-balloon time, weekend/evening hours, min, median (IQR) | 78 (66-106) | 58 (47-63) | |
| Emergent cardiac bypass surgery | 15 (11%) | 3 (5%) | 18 (9%) |
| Initial troponin I, median (IQR) | 0.089 (0.030-0.898) | 0.080 (0.020-0.530) | 0.081 (0.030-0.805) |
| Peak troponin, median (IQR) | 4.30 (2.1-11.4) | 18.14 (0.81-65.19) | 4.75 (0.52-40.03) |
| In-hospital deaths | 5(4) | 3(5) | 8(4) |
Scherer © 2012 Prehospital and Disaster Medicine