Table 1.
Characteristics of the participants in both population studies.
| Variable | GESUS (training) | Inter99 (replication) |
|---|---|---|
| Number of samples (n) | 8939 | 6667 |
| Age (years) | 56.6 [35.1; 78.4] | 45.3 [34.5; 60.0] |
| Female sex | 54.3% (4852) | 51.2% (3412) |
| BMI (kg/m2) | 26.1 [20.4; 35.3] | 25.7 [20.2; 34.8] |
| Heart rate (bpm) | 64 [48; 85] | 66 [51; 86] |
| QT interval (ms) | 408 [364; 460] | 402 [362; 450] |
| PR interval (ms) | 158 [126; 204] | 156 [124; 196] |
| QRS duration (ms) | 92 [76; 118] | 90 [76; 110] |
| J-point elevation V5 (µV) | − 5 [− 54; 48] | 4 [− 35; 58] |
| R-peak amplitude V5 (µV) | 1376 [698; 2,426] | 1171 [600; 2,044] |
| T-wave amplitude V5 (µV) | 346 [122; 698] | 327 [122; 649] |
| Bundle branch block (QRS ≥ 120 ms) | 4.4% (390) | 1.6% (107) |
| 1° AV block (PR > 220 ms) | 2.0% (174) | 0.9% (61) |
Values are presented as median [fifth to ninety-fifth percentiles] for continuous measures and % (n) for categorical variables.