Clinical characteristics and presenting symptoms according to diagnoses (GOLD criteria)
| COPD+ Ischaemia− (n=122) | COPD− Ischaemia+ (n=43) | COPD+ Ischaemia+ (n=12) | Other spirometry finding Ischaemia− (n=20) | Normal findings (n=203) | P values | |
| Age, years | 69.5 (8.9) | 64.7 (7.5) | 72.3 (6.2) | 64.4 (11.9) | 64.4 (11.4) | 0.001* |
| Sex, % women | 50.0 | 22.7 | 9.1 | 40.0 | 48.6 | 0.002 |
| Ever smoker, % | 71.7 | 76.7 | 91.7 | 60.0 | 56.9 | 0.006 |
| Current smoker, % | 15.0 | 14.0 | 25.0 | 10.0 | 8.9 | 0.282 |
| History of CAD, % | 33.6 | 51.2 | 83.3 | 55.0 | 25.7 | <0.001 |
| Chest discomfort, % | 71.3 | 72.1 | 83.3 | 60.0 | 73.4 | 0.659 |
| Dyspnoea, % | 18.9 | 14.0 | 8.3 | 5.0 | 19.7 | 0.404 |
| FEV1, % of predicted | 83.1 (14.9) | 97.8 (14.7) | 73.7 (15.5) | 81.3 (12.1) | 99.0 (13.1) | <0.001 |
| VC, % of predicted | 97.0 (15.1) | 92.7 (11.6) | 84.5 (11.1) | 75.4 (8.9) | 95.4 (12.0) | <0.001* |
| BMI, kg/m2 | 29.1 (4.7) | 30.0 (4.7) | 27.4 (3.3) | 30.4 (5.3) | 27.6 (4.4) | 0.001 |
| Dyslipidaemia, % | 38.5 | 51.2 | 58.3 | 45.0 | 33.5 | 0.115 |
| SBP, mm Hg | 140.0 (16.7) | 141.3 (17.8) | 141.7 (16.4) | 141.3 (15.0) | 137.2 (18.0) | 0.421 |
| DBP, mm Hg | 80.3 (8.4) | 81.0 (8.0) | 77.5 (8.4) | 81.8 (11.9) | 79.5 (9.4) | 0.573 |
| Heart rate, bpm | 70.8 (12.1) | 70.5 (10.8) | 72.8 (13.2) | 70.0 (13.3) | 68.1 (11.3) | 0.214 |
P values are reported for ANOVA test for continuous variables and χ2 for dichotomous variables, unless otherwise specified.
*P value reported for Welch ANOVA test due to inhomogeneity of variances between groups.
BMI, Body Mass Index; CAD, coronary artery disease; COPD, chronic obstructive pulmonary disease; DBP, diastolic blood pressure; GOLD, The Global Initiative for Chronic Obstructive Lung Disease; SBP, systolic blood pressure.