Table 1 Demographic characteristics and echocardiographic measurements of the population
Variable | Derivation set (n = 276) | Validation set (n = 276) | P value |
|---|---|---|---|
Age (years) | 59.1 ± 10.8 | 57.7 ± 11.3 | 0.13 |
Female [n (%)] | 114 (41.3%) | 107 (38.8%) | 0.52 |
Body surface area (m2) | 1.76 ± 0.17 | 1.78 ± 0.18 | 0.40 |
Heart rate (bpm) | 69.1 ± 12.5 | 69.7 ± 11.9 | 0.60 |
LV end-diastolic diameter (mm) | 53.11 ± 8.74 | 52.99 ± 8.54 | 0.87 |
LV end-diastolic volume (mL) | 94.00 (78.00–122.00) | 97.00 (79.25–127.00) | 0.69 |
LVEF (%) | 56.69 ± 12.12 | 56.86 ± 12.13 | 0.87 |
Depressed LVEF [n (%)] | 59 (21.4%) | 60 (21.7%) | 0.92 |
LAAP (mm) | 39.44 ± 5.94 | 39.25 ± 6.21 | 0.72 |
LAAPI (mm/m2) | 22.50 ± 3.68 | 22.20 ± 3.49 | 0.32 |
LAAPI > 23 mm/m2 [n (%)] | 105 (38.0%) | 89 (32.2%) | 0.15 |
LAV (mL) | 53.00 (43.00–66.83) | 51.50 (42.00–67.00) | 0.62 |
LAVI (mL/m2) | 30.19 (24.16–36.73) | 29.03 (23.59–37.13) | 0.48 |
LAVI > 34 mL/m2 [n (%)] | 94 (34.1%) | 89 (32.2%) | 0.65 |
Septal e′ velocity (cm/s) | 6.09 ± 2.30 | 6.11 ± 2.49 | 0.92 |
Septal e′ velocity < 7 cm/s [n (%)] | 168 (60.9%) | 168 (60.9%) | 1.00 |
Lateral e′ velocity (cm/s) | 8.88 ± 3.31 | 8.70 ± 3.40 | 0.51 |
Lateral e′ velocity < 10 cm/s [n (%)] | 163 (59.1%) | 174 (63.0%) | 0.36 |
Average E/e′ | 10.96 ± 5.54 | 11.24 ± 5.74 | 0.56 |
Average E/e′ > 14 [n (%)] | 51 (18.5%) | 54 (19.6%) | 0.78 |
TR velocity > 2.8 m/s [n (%)] | 37/214 | 35/229 | 0.57 |