Table 1.
Baseline characteristics
| All patients | Diabetics | Non-diabetics | p Valuea | |
|---|---|---|---|---|
| (n = 1126) | (n = 147) | (n = 979) | ||
| Clinical characteristics | ||||
| Age (years; mean ± SD) | 61.4 ± 12.6 | 64.9 ± 10.5 | 60.9 ± 12.8 | 0.0003 |
| Male gender (%) | 656 (58) | 89 (60) | 567 (58) | 0.6 |
| BMI (kg/m²; mean ± SD) | 26.8 ± 4.3 | 28.7 ± 4.4 | 26.5 ± 4.2 | <0.0001 |
| Mean heart rate (min−1 ± SD) | 62.6 ± 11.8 | 63.6 ± 12.4 | 62.5 ± 11.7 | 0.29 |
| Risk factors | ||||
| Number of risk factors (mean ± SD) | 2.0 ± 1.2 | 2.4 ± 1.2 | 1.9 ± 1.2 | <0.0001 |
| Hypertension (%) | 671 (60) | 105 (71) | 566 (58) | 0.002 |
| Hypercholesterolemia (%) | 484 (43) | 76 (52) | 408 (42) | 0.027 |
| Obesity (BMI ≥ 30 kg/m²) (%) | 231 (20) | 54 (37) | 177 (18) | <0.0001 |
| Current smoking (%) | 356 (32) | 50 (34) | 306 (31) | 0.56 |
| Family history of coronary disease (%) | 530 (47) | 69 (47) | 461 (47) | 0.95 |
| Symptoms | ||||
| Typical angina pectoris (%) | 271 (24) | 26 (18) | 240 (25) | 0.08 |
| Atypical angina pectoris (%) | 335 (30) | 47 (32) | 288 (29) | 0.59 |
| Non-anginal or other symptoms (%) | 224 (20) | 43 (29) | 186 (19) | 0.005 |
| Asymptomatic (%) | 296 (26) | 31 (21) | 265 (27) | 0.15 |
| Pre-test likelihood of CADb | ||||
| Low (%) | 165 (15) | 5 (3) | 160 (16) | 0.0001 |
| Intermediate (%) | 609 (54) | 62 (42) | 547 (56) | 0.002 |
| High (%) | 352 (31) | 80 (54) | 272 (28) | <0.0001 |
Data are presented as number (percentage) of subjects or the mean value ± SD. Body-mass index (BMI). aVariables were compared between diabetic and non-diabetic patients using the independent samples t test and Pearson’s chi-square test, as appropriate. b According to the scoring method of Morise.