Table 1 Distribution of analyzed variables according to diagnostic group and unadjusted Odds Ratio over the derivation cohort.
Variables | Validation cohort | Derivation cohort | |||
|---|---|---|---|---|---|
(n = 774) | All (n = 661) | CHD group (n= 85) | Non-CHD group (n= 576) | OR(unadjusted) (95% CI) | |
% | % | n (%) | n (%) | ||
Gender (Male) | 42.0% | 47.5% | 43 (50.6%) | 271 (47.0%) | 1.2 (0.7 to 1.8) |
Age-gender categories | |||||
M < 55 yr or F < 65 yr | 48.4% | 57.8% | 6 (7.1%) | 376 (65.3%) | 1 |
M 55 to 64 yr or F 65 to 74 yr | 26.0% | 14.1% | 17 (20.0%) | 83 (14.4%) | 12.8 (4.9 to 33.5) |
M ≥ 65 yr or F ≥ 75 yr | 25.6% | 27.1% | 62 (72.9%) | 117 (20.3%) | 33.2 (14.0 to 78.7) |
Known CVR | |||||
None | 21.2% | 34.5% | 2 (2.3%) | 226 (39.2%) | 1 |
1-2 | 53.2% | 50.5% | 46 (54.1%) | 288 (50.0%) | 18.1 (4.3 to 15.8) |
≥3 | 25.6% | 15.0% | 37 (43.5%) | 62 (10.8%) | 67.4 (15.8 to 287.6) |
Previous history of CVD | 22.0% | 18.2% | 62 (72.9%) | 58 (10.1%) | 24.1 (12.5 to 46.4) |
Characteristic of the pain | |||||
Duration 1 to 60 minutes | 42.6% | 35.2% | 66 (77.6%) | 167 (29.0%) | 8.5 (4.8 to 15.1) |
Increasing on exertion | 19.8% | 21.3% | 37 (43.5%) | 104 (18.1%) | 3.5 (2.1 to 5.7) |
Substernal area pain | 57.5% | 16.3% | 43 (50.6%) | 65 (11.3%) | 8.0 (4.7 to 13.7) |
No tenderness on palpation | 57.0% | 54.3% | 74 (87.1%) | 285 (49.5%) | 6.9 (3.5 to 13.5) |
Sudden excruciating pain | n/a | 50.1% | 34 (40.0%) | 297 (51.6%) | 0.63 (0.39 to 1.0) |
Oppressive pain | 43.4% | 36.5% | 56 (65.9%) | 185 (32.1%) | 4.1 (2.5 to 6.7) |
Irradiation | 14.0% | 9.1% | 8 (9.4%) | 52 (9.0%) | 1.0 (0.5 to 2.3) |
Not position dependant | n/a | 75.8% | 77 (90.6%) | 424 (73.6%) | 3.5 (1.6 to 7.4) |
Not increased with breathing | 78.2% | 76.5% | 80 (94.1%) | 426 (74.0%) | 5.6 (2.2 to 14.4) |
Digestive symptoms | 29.0% | 24 (28.2%) | 168 (29.2%) | 0.96 (0.58 to 1.6) | |
Context | |||||
Known patient | 91.3% | 91.1% | 80 (94.1%) | 522 (90.6%) | 1.7 (0.64 to 4.3) |
New complaint | n/a | 48.8% | 19/83 (22.9%) | 295/561 (52.6%) | 0.27 (0.15 to 0.46) |
Emergency | n/a | 29.1% | 19 (22.3%) | 173/574 (30.1%) | 0.67 (0.39 to 1.1) |
Principle complaint | 89.3% | 52.8% | 42/84 (50.0%) | 305/573 (53.2%) | 0.88 (0.56 to 1.4) |
CVR status unknown (no lab) | n/a | 4.8% | 2 (2.3%) | 30 (5.2%) | 0.44 (0.1 to 1. 9) |