Table 2.
Demographic data, overall image quality, and diagnostic accuracy
| Mean heart rate | Agatston score | ||||
|---|---|---|---|---|---|
| Total | <70 bpm | ≥70 bpm | <400 | ≥400 | |
| No. of patients | 30 | 17 | 13 | 15 | 15 |
| Age (years) | 63.1±11.3 | 63.2±10.1 | 62.9±13.3 | 62.8±13.7 | 63.4±8.9 |
| Male/female | 24/6 | 15/2 | 9/4 | 10/5 | 14/1 |
| BMI (kg/m2) | 28.3±3.9 | 28.9±4.3 | 27.6±3.5 | 28.1±3.5 | 28.5±4.4 |
| Mean heart rate (bpm) | 70.3±14.2 | 59.7±5.9 | 84.2±8.4 | 70.6±13.7 | 70.0±15.1 |
| Agatston score | 821±904 | 901±991 | 674±780 | 85±118 | 1,483±893 |
| Overall image qualitya | 1.68±0.75 | 1.60±0.73 | 1.81±0.77 | 1.59±0.75 | 1.79±0.75 |
| Score 1 | 47.4% (199/420) | 51.8% (131/245) | 38.9% (68/175) | 54.2% (116/214) | 40.3% (83/206) |
| Score 2 | 37.9% (159/420) | 32.4% (82/245) | 44.0% (77/175) | 35.5% (76/214) | 40.3% (83/206) |
| Score 3 | 13.3% (56/420) | 11.9% (30/245) | 14.9% (26/175) | 7.5% (16/214) | 19.4% (40/206) |
| Score 4 | 1.4% (6/420) | 0.8% (2/245) | 2.2% (4/175) | 2.8% (6/214) | – |
| Sensitivity | 96.4% (54/56) | 97.2% (35/36) | 95.0% (19/20) | 100% (5/5) | 96.1% (49/51) |
| 95% CI | 87.7–99.6 | 85.5–99.9 | 75.1–99.9 | 47.8–100 | 86.5–99.5 |
| Specificity | 97.5% (355/364) | 97.1% (203/209) | 98.0% (152/155) | 99.5% (208/209) | 94.8% (147/155) |
| 95% CI | 95.4–98.9 | 94.2–98.8 | 94.5–99.6 | 97.4–100 | 90.1–97.8 |
| PPV | 85.7% (54/63) | 85.4% (35/41) | 86.4% (19/22) | 83.3% (5/6) | 86.0% (49/57) |
| 95% CI | 74.6–93.3 | 70.8–94.4 | 65.1–97.1 | 35.9–99.6 | 74.2–93.7 |
| NPV | 99.4% (355/357) | 99.5% (203/204) | 98.8% (152/153) | 100% (208/208) | 98.7% (147/149) |
| 95% CI | 98.0–99.9 | 97.3–100 | 96.4–100 | 98.2–100 | 95.2–99.8 |
aApplied scores were 1 excellent (no artifacts), 2 good (minor artifacts, good image quality), 3 adequate (moderate artifacts, acceptable image quality), and 4 not assessable (severe artifacts impairing image evaluation). A score of 1–3 was considered acceptable for diagnosis.
BMI Body mass index, CI confidence interval, PPV positive predictive value, NPV negative predictive value