Table 1. Patient characteristics, test bolus parameters, scanning parameters and measured VCE for Group 1a, 2 and the Reference Group.
| Parameters | Group 1a | Group 2 | Reference Group | P value (Group 2 vs. Reference Group) |
|---|---|---|---|---|
| Patient (n) | 75 | 45 | 45 | |
| Male/female ratio | 34:41 | 19:26 | 22:23 | |
| Age (years) | 56.5±10.6 | 57.7±14.4 | 59.6±12.2 | 0.611 |
| Body weight (kg) | 67.2±9.5 | 64.7±11.2 | 66.1±9.0 | 0.684 |
| BMI (kg·m-2) | 25.9±4.1 | 24.9±3.3 | 25.0±2.8 | 0.824 |
| BSA (m2) | 1.8±0.2 | 1.7±0.2 | 1.8±0.2 | 0.432 |
| Heart rate (bpm) | 63.9±7.2 | 67.7±9.4 | 65.8±4.0 | 0.373 |
| PCE at test bolus (HU) | 100.4±28.5 | 114.8±44.9 | 96.6±29.5 | 0.017* |
| TTP at test bolus (s) | 16.2±2.5 | 15.6±3.2 | 15.0±1.8 | 0.453 |
| Tube voltage (kVp) | 120 | 100 | 120 | |
| Reference mAs (mAs) | 320 | 370 | 320 |
*, P<0.05. BMI, body mass index; BSA, body surface area; mAs, tube current-time product; PCE, peak contrast enhancement; TTP, time-to-peak; VCE, vessel contrast enhancement.