TABLE 1.
Emergency department ST‐segment elevation myocardial infarction (STEMI) patients demographics by location of the diagnostic ECG
| Available data patient sample (N) | Total population N = 207 | ED‐diagnosed (diagnosis after arrival) N = 147 | EMS‐diagnosed (diagnosed en route to PCI center ED) N = 56 | Referred (diagnosed before transport ED arrival) N = 4 | P * | |
|---|---|---|---|---|---|---|
|
Age (years)† < 65 ≥65 |
207 |
55 62 70 62% (128) 38% (79) |
55 61 69 64% (94) 36% (53) |
55 62 73 57% (32) 43% (24) |
55 62 70 50% (2) 50% (2) |
0.84 |
|
Sex Female |
207 |
27% (55) |
27% (39) |
29% (16) |
0% (0) |
0.46 |
|
Race White Black Other |
205 |
88% (180) 11% (22) 1% (3) |
87% (127) 11% (16) 2% (3) |
89% (49) 11% (6) 0% (0) |
100% (4) 0% (0) 0% (0) |
0.90 |
|
Ethnicity Hispanic Non‐Hispanic Unknown |
207 |
1% (3) 92% (190) 7% (14) |
< 1% (2) 93% (136) 6% (9) |
2% (1) 89% (50) 9% (5) |
0% (0) 100% (4) 0% (0) |
0.92 |
|
Insurance status Private Medicare Self‐pay/unknown Other Medicaid |
206 |
45% (92) 19% (40) 34% (69) 2% (4) 0% (1) |
48% (70) 18% (26) 32% (47) 2% (3) < 1% (1) |
35% (19) 24% (13) 39% (22) 2% (1) 0% (0) |
75% (3) 25% (1) 0% (0) 0% (0) 0% (0) |
0.45 |
| Established primary care Yes | 148 | 80% (118) | 79% (84) | 82% (31) | 100% (3) | 0.90 |
|
Distance from the hospital† Miles from home address |
202 | 11 25 65 | 9.2 25 60 | 12 20 69 | 57 79 87 | 0.33 |
|
Arrival chief complaints‡ Chest pain Shortness of breath Shoulder/neck pain Abdominal pain |
207 |
74% (153) 25% (51) 9% (18) 2% (4) |
69% (101) 29% (42) 8% (12) 2% (3) |
86% (48) 16% (9) 9% (5) 0% (0) |
100% (4) 0% (0) 25% (1) 25% (1) |
0.02 0.12 0.42 0.05 |
| Door to diagnostic ECG† | 207 | ‐12 5 10 | 5 7 17 | ‐50 ‐32 ‐15 | ‐204 ‐101 ‐46 | <0.001 |
|
Cases occurring during cath lab Business hours After hours |
185 |
44% (82) 56% (103) |
44% (55) 56% (71) |
45% (25) 55% (31) |
67% (2) 33% (1) |
0.73 |
Cath, catheterization; ED, emergency department; EMS, emergency medical services; PCI, percutaneous coronary intervention.
P values calculated using the Pearson chi‐square test for continuous and categorical outcomes, and Fisher's exact test when categorical outcomes includes < 5 patients. †a b c where a represent the lower quartile, b the median, and c the upper quartile for continuous variables. Numbers after proportions are frequencies. ‡Presented are the chief complaints reported during ED intake. Arrival chief complaints are not mutually exclusive.