Table 2.
Scan demographics.
| Group A | Group B | p Value | |||
|---|---|---|---|---|---|
| n = 388 | n = 72 | ||||
| HR during scan (beats/min) | 71.5 | (62.5–83.1) | 71 | (60.5–81.9) | 0.5 |
| HR variability (beats/min) | 8 | (2.0–37.0) | 5.5 | (2.0–34.0) | 0.34 |
| Contrast to noise ratio (HU) | 11.6 | ±4.3 | 11.9 | ±4.1 | 0.59 |
| CAC | 859 | (285–1975) | 99 | (36–303) | <0.001 |
| CAD+ | CAD− | <0.001 | |||
| n = 272 | n = 116 | ||||
| 1792 | 463 | ||||
| (617–2330) | (60–628) | ||||
| Tube potential 70 kV | 8 | 2.1% | 2 | 2.8% | 0.07 |
| Tube potential 80 kV | 213 | 54.9% | 34 | 47.2% | |
| Tube potential 100 kV | 139 | 35.8% | 34 | 47.2% | |
| Tube potential 120 kV | 18 | 4.6% | 0 | 0% | |
| DLP (mGy×cm) | 900.4 | ±384.9 | 834.1 | ±317.8 | 0.12 |
Data are mean ± standard deviation, median and interquartile range in parenthesis or count and frequency in percent. CAC = coronary artery calcium score, CAD− = negative for coronary artery disease, CAD+ = positive for coronary artery disease, DLP = Dose length product, HR = heart rate.