Table 2.
Procedural patient characteristics, scanner platform, and risk by institution.
| Characteristics | All Patients | Institution A | Institution B | Institution C | Institution D | p-value |
|---|---|---|---|---|---|---|
| CCT procedures, n (%) | 1045 | 318 | 345 | 338 | 44 | |
| Age at procedure, yrs, median (IQR) | 1.7 (0.3, 11.0) | 3.3 (0.3, 12.5) | 2.5 (0.2, 11.1) | 0.7 (0.2, 8.0) | 1.3 (0.4, 6.0) | 0.001 |
| Gender, Female, n (%) | 422 (40) | 143 (45) | 138 (40) | 119 (35) | 22 (50) | 0.041 |
| Weight, kg, mean ± SD | 23.2 ± 25.2 | 26.3 ± 26.2 | 25.1 ± 26.4 | 18.9 ± 23.1 | 17.9 ± 16.5 | <0.001 |
| BSA, m2, mean ± SD | 0.75 ± 0.59 | 0.82 ± 0.60 | 0.64 ± 0.55 | 0.64 ± 0.55 | 0.68 ± 0.51 | <0.001 |
| Patient Status | <0.001 | |||||
| Outpatient, n (%) | 703 (67) | 216 (68) | 255 (74) | 212 (63) | 20 (45) | |
| Inpatient, n (%) | 342 (33) | 102 (32) | 90 (26) | 126 (37) | 24 (55) | |
| CT scanner platform | <0.001 | |||||
| Second gen DS-Flash, n (%) | 678 (65) | 318 (100) | 0 (0) | 316 (93) | 44 (100) | |
| Second gen DS-Drive, n (%) | 17 (2) | 0 (0) | 1 (0) | 16 (5) | 0 (0) | |
| Third gen DS-Force, n (%) | 350 (33) | 0 (0) | 344 (100) | 6 (2) | 0 (0) | |
| Sedation | ||||||
| Sedation administered for scan | 196 (19) | 72 (23) | 107 (31) | 16 (5) | 1 (2) | <0.001 |
| Mild to moderate, n (%) | 32 (3) | 2 (1) | 28 (8) | 1 (0) | 1 (2) | |
| Deep w/o airway support, n (%) | 49 (5) | 11 (3) | 28 (8) | 10 (3) | 0 (0) | |
| Anesthesia w/airway support, n (%) | 115 (11) | 59 (19) | 51 (15) | 5 (1) | 0 (0) | |
| Functional Scan | 29 (3) | 0 (0) | 29 (8) | 0 (0) | 0 (0) | |
| Anatomic Scan only | 86 (8) | 59 (19) | 22 (6) | 5 (3) | 0 (0) | |
| Patient clinically intubated, n (%) | 92 (9) | 9 (3) | 39 (11) | 40 (12) | 4 (9) | |
| Vascular Access | ||||||
| Peripheral IV, n (%) | 960 (93) | 283 (92) | 333 (98) | 302 (90) | 42 (95) | <0.001 |
| Contrast Dose ml/kg, median (IQR) | 2.0 (1.7, 2.3) | 2.9 (2.2, 3.0) | 1.9 (1.4, 2.0) | 2.0 (1.8, 2.1) | 1.8 (1.5, 2.0) | <0.001 |
| Volume, median (IQR) | 25 (10, 60) | 40 (16, 106) | 25 (9, 55) | 15 (8, 50) | 20 (11, 40) | <0.001 |
| Cardiovascular Medication | ||||||
| Beta blocker, n (%) | 113 (11) | 51 (16) | 61 (18) | 0 (0) | 1 (2) | <0.001 |
| Nitroglycerin, n (%) | 16 (2) | 0 (0) | 16 (5) | 0 (0) | 0 (0) | <0.001 |
| Adverse Events, n (%) | 7 (1) | 4 (1) | 0 (0) | 3 (1) | 0 (0) | 0.188 |
| Radiation | ||||||
| Procedural DLP, mGy*cm, median (IQR) | 20 (10, 50) | 32 (12, 65) | 22 (11, 58) | 13 (7, 26) | 20 (12, 36) | <0.001 |
CCT, cardiac computed tomography; yrs, years; IQR, interquartile range; kg, kilograms; BSA, body surface area; gen-DS, generation dual source; w/o, without; w/, with; IV, intravenous; ml, milliliters; DLP, dose length product; Continuous values are reported as mean ± standard deviation or median (IQR) if skewed. Discrete variables reported as count and percent.