Table 1 Characteristics of the study sample by observers
Observer | total | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | P |
|---|---|---|---|---|---|---|---|---|---|---|
N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | ||
Total | 265 (100) | 21 (7.7) | 61 (22.5) | 10 (3.7) | 80 (30.4) | 21 (7.7) | 18 (6.6) | 24 (8.9) | 28 (10.3) | < 0.001 |
Men | 68 (25.7) | 7 (33.3) | 21 (34.4) | 5 (50.0) | 14 (17.5) | 5 (23.8) | 4 (22.2) | 7 (29.2) | 5 (17.9) | 0.180 |
History of myocardial infarction | 19 (7.2) | 1 (4.8) | 4 (6.6) | 1 (10.0) | 7 (8.7) | 1 (5.0) | 0 (0.0) | 3 (12.5) | 2 (7.1) | 0.870 |
History of angina | 32 (12.1) | 3 (14.3) | 12 (19.2) | 1 (10.0) | 8 (10.0) | 1 (4.8) | 1 (5.9) | 3 (12.5) | 3 (10.7) | 0.606 |
History of heart failure | 43 (16.3) | 3 (14.3) | 13 (21.3) | 1 (10.0) | 15 (18.8) | 1 (4.8) | 1 (5.9) | 5 (20.8) | 4 (14.3) | 0.582 |
Left ventricular systolic dysfunction | 18 (7.1) | 1 (4.8) | 6 (10.2) | 0 (0.0) | 5 (6.6) | 0 (0.0) | 0 (0.0) | 3 (13.0) | 3 (13.0) | 0.571 |
NYHA classification | ||||||||||
I | 85 (33.3) | 10 (47.6) | 26 (43.3) | 3 (30.0) | 7 (9.3) | 10 (58.8) | 2 (11.1) | 15 (62.5) | 12 (42.9) | < 0.001 |
II | 147 (57.6) | 10 (47.6) | 29 (48.3) | 5 (50.0) | 61 (81.3) | 5 (29.4) | 15 (83.3) | 7 (29.2) | 14 (50.0) | |
III and IV | 23 (9.0) | 1 (4.8) | 5 (8.3) | 2 (20.0) | 7 (9.3) | 2 (11.8) | 1 (5.6) | 2 (8.3) | 2 (7.1) | |
Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | ||
Age (years) | 65.8 (9.7) | 67.5 (9.1) | 67.6 (10.3) | 66.8 (10.5) | 65.6 (9.1) | 68.6 (7.9) | 62.1 (7.9) | 60.0 (8.7) | 67.1 (10.3) | 0.021 |
Systolic blood pressure (mmHg) | 136 (21) | 128 (19) | 137 (23) | 142 (15) | 135 (21) | 142 (22) | 136 (23) | 138 (20) | 137 (21) | 0.574 |
Diastolic blood pressure (mmHg) | 80 (12) | 81 (10) | 79 (13) | 84 (13) | 77 (10) | 77 (12) | 88 (15) | 82 (10) | 81 (14) | 0.025 |
Body mass index (kg/m2) | 30 (5.5) | 31.4 (7.1) | 28.7 (4.5) | 28.8 (6.3) | 29.4 (4.7) | 27.9 (4.6) | 33.0 (6.1) | 32.9 (5.9) | 31.2 (6.4) | 0.001 |
Med (IQR) | Med (IQR) | Med (IQR) | Med (IQR) | Med (IQR) | Med (IQR) | Med (IQR) | Med (IQR) | Med (IQR) | ||
Education (years) | 4 (5) | 4 (4) | 4 (3) | 7 (7) | 4 (5) | 4 (7) | 5 (3) | 4 (6) | 4 (0) | 0.368 |