Table 5. Comparative analysis of variables according to the QTc change between pre-HD and peak stress (n = 108).
| Variable | ΔQTc≤0 (n = 34) | ΔQTc>0 (n = 74) | p value |
|---|---|---|---|
| Gender M/F | 31/3 | 53/21 | 0.023 |
| Pre-dialysis serum Ca (mmol/L) | 2.30±0.20 | 2.38±0.17 | 0.043 |
| Pre-dialysis serum P (mmol/L) | 1.93±0.71 | 2.24±0.75 | 0.045 |
| Pre-dialysis serum Ca*P | 4.50±1.69 | 5.38±2.03 | 0.022 |
| ΔK (mmol/L) a | -1.15±0.64 | -1.39±0.50 | 0.040 |
| Ferritin (ng/ml) | 154.19±117.08 | 322.75±232.53 | <0.001 |
| Pre-dialysis UA (μmol/L) | 390.00±54.46 | 446.23±77.33 | <0.001 |
| Pre-dialysis Log BNP (pg/ml) | 3.64±0.45 | 4.10±0.43 | <0.001 |
| LAD (mm) | 39.04±4.39 | 42.32±3.22 | <0.001 |
| IVS (mm) | 10.97±1.50 | 12.06±2.17 | 0.011 |
| LVPW (mm) | 10.32±1.40 | 11.53±1.40 | <0.001 |
a ΔK = K peak-stress- K pre-HD