Table 2.
Characteristics of Patients With ST‐Segment Elevation Myocardial Infarction Included in the Study According to Time of Intervention
| Characteristics | All | Preintervention | Baseline | Postintervention |
|---|---|---|---|---|
| Total patients, n (%) | 889 (100) | 206 (23.2) | 123 (13.8) | 560 (63) |
| Age, y, mean, median (interquartile range) | 65, 64 (57–73) | 64, 64 (56–64) | 66, 65 (58–73) | 65, 65 (56–73) |
| Female sex, n (%) | 223 (25.1) | 41 (19.9) | 31 (25.2) | 151 (27) |
| Length of stay, days, mean, median (interquartile range) | 3.8, 2 (2–4) | 4, 2 (0–0) | 3.9, 2 (1–1) | 3.7, 2 (2–2) |
| Distance, miles, mean, median (interquartile range) | 97.3, 47 (11.2–117) | 81.5, 85 (20.1–115) | 83.2, 93.6 (20.3–118) | 105.7, 30 (9.7–117.8)a |
The preintervention group is the reference for comparison of baseline and postintervention groups. The Mann–Whitney U test was used to determine differences in distributions of continuous variables, and the chi‐square test was used to evaluate differences by sex. P<0.05 was considered statistically significant for all tests.
a
P=0.02.