Table 1

Clinical Characteristics

CharacteristicsDyspnea Alone (n = 443) Group 1Chest Pain Alone (n = 2033) Group 2Dyspnea and Chest Pain (n = 587) Group 3p Value Group 1 vs. 2p Value Group 1 vs. 3p Value Group 2 vs. 3
Clinical characteristics, n (%)
 Age (mean, yrs)64.5 ± 11.058.7 ± 12.863.9 ± 11.5<0.00010.5238<0.0001
 Male gender237 (54)926 (46)309 (53)0.00240.78470.0024
 Current smoking52 (12)277 (14)77 (13)0.29730.52520.7388
 Diabetes mellitus45 (10)167 (8)69 (12)0.18090.43330.0088
 Prior MI53 (12)145 (7)97 (17)0.00070.0389<0.0001
 Revascularization42 (10)165 (8)110 (19)0.3470<0.0001<0.0001
 Hypertension231 (52)848 (42)289 (49)<0.00010.35490.0012
 Hypercholesterolemia223 (50)1,078 (53)349 (60)0.32860.00410.0059
 Beta-blocker therapy71 (16)408 (20)163 (28)0.0528<0.0001<0.0001
 Mild lung disease8 (2)36 (2)42 (7)0.9596<0.0001<0.0001
Body mass index (kg/m2)
 Mean27.7 ± 4.827.5 ± 7.127 ± 4.70.09820.20360.3105
 > 30113 (26)453 (22)123 (21)0.43690.14300.6787
Baseline ECG, n (%)
 Normal190 (43)1,152 (57)250 (43)<0.00010.9357<0.0001
 Q-wave61 (14)169 (8)82 (14)0.02100.75390.0298
 ST/T abnormalities182 (42)663 (31)247 (42)0.10060.59410.2463

ECG = electrocardiogram; MI = myocardial infarction.