Table 2.
Predictors of short total pre-hospital delays
| Delay ≤ 120 min (%) | Delay > 120 min (%) | p-value (χ2) | Odds ratioa | 95% Confidence interval | p-value | |
|---|---|---|---|---|---|---|
| Sociodemographic factors | ||||||
| Marital status | ||||||
| Not married | 29.7 | 41.9 | 0.056 | 1 | ||
| Married | 70.3 | 58.1 | 1.77 | (1.01 to 3.11) | 0.048 | |
| Clinical factors | ||||||
| Type of acute coronary syndrome | ||||||
| UAb/NSTEMIc | 22.5 | 35.9 | 0.027 | 1 | (1.03 to 3.90) | 0.028 |
| STEMId | 77.5 | 64.1 | 1.93 | |||
| Number of pain symptoms: (in addition to chest pain) | ||||||
| None | 11.7 | 18.8 | 0.005 | 1 | ||
| 1–3 | 49.5 | 61.5 | 1.34 | (0.62 to 2.93) | 0.460 | |
| 4–8 | 38.7 | 19.7 | 3.03 | (1.39 to 7.86) | 0.007 | |
| Number of non-pain symptoms | ||||||
| None | 15.3 | 25.6 | 0.001 | 1 | ||
| 1–2 | 41.4 | 53.0 | 1.33 | (0.65 to 2.73) | 0.429 | |
| 3–6 | 43.2 | 21.4 | 3.49 | (1.60 to 7.58) | 0.002 | |
| Cardiac risk factors | ||||||
| Previous myocardial infarction | ||||||
| No | 83.8 | 93.1 | 0.028 | 1 | ||
| Yes | 16.2 | 6.9 | 2.80 | (1.15 to 6.82) | 0.023 | |
| Attribution | ||||||
| Symptoms attributed to heart attack | ||||||
| No | 68.2 | 80.3 | 0.036 | 1 | ||
| Yes | 31.8 | 19.7 | 1.90 | (1.03 to 3.49) | 0.039 | |
| Proximal factors | ||||||
| Location at onset | ||||||
| Home | 55.9 | 73.3 | 0.006 | 1 | ||
| Other | 44.1 | 26.7 | 2.23 | (1.25 to 3.95) | 0.006 | |
| Presence of a bystander | ||||||
| Absent | 35.5 | 55.6 | 0.006 | 1 | ||
| Present | 64.5 | 44.4 | 2.26 | (1.26 to 4.15) | 0.006 | |
| Time of onset | ||||||
| 0001–1200 | 44.1 | 62.4 | 0.006 | 1 | ||
| 1201–2400 | 55.9 | 37.6 | 2.08 | (1.23 to 3.54) | 0.007 | |
a
Adjusted for age and gender.
b
Unstable angina.
c
Non Non-ST elevation myocardial infarction.
d
ST elevation myocardial infarction.