Table 2. Number and Total Charges for All Imaging Studies.
| Group | No. of imaging studies | Total charges (in thousands), $ |
|---|---|---|
| Entire surveillance period | ||
| All patients (N = 136) | ||
| Mean (SD) | 14.1 (10.2) | 36.8 (24.5) |
| Median (range) | 11 (0-49) | 34.5 (0.0-110.9) |
| No recurrence (n = 109) | ||
| Mean (SD) | 13.4 (9.9) | 35.0 (21.7) |
| Median (range) | 11 (0-49) | 34.5 (0.0-93.5) |
| Recurrence (n = 27) | ||
| Mean (SD) | 17.0 (11.2) | 44.3 (33.1) |
| Median (range) | 14 (3-38) | 34.7 (5.3-110.9) |
| Mean difference (95% CI) | 3.7 (−0.7 to 8.0) | 9.3 (−4.3 to 23.0) |
| Per year of surveillance | ||
| All patients (N = 136) | ||
| Mean (SD) | 4.8 (4.2) | 11.8 (8.2) |
| Median (range) | 4 (0-18) | 10.0 (0.0-40.0) |
| No recurrence (n = 109) | ||
| Mean (SD) | 3.8 (2.5) | 9.7 (5.8) |
| Median (range) | 3 (0-17) | 9.3 (0.0-25.2) |
| Recurrence (n = 27) | ||
| Mean (SD) | 8.7 (6.6) | 20.3 (10.9) |
| Median (range) | 8 (1-32) | 22.3 (1.5-40.0) |
| Mean difference (95% CI) | 5.0 (3.4-6.6) | 10.6 (6.1-15.0) |
| Per year of surveillance in disease-free patients | ||
| No symptoms (n = 92) | ||
| Mean (SD) | 3.6 (2.5) | 9.6 (5.9) |
| Median (range) | 3 (0-17) | 9.4 (0.0-25.2) |
| Symptoms (n = 17) | ||
| Mean (SD) | 4.4 (2.9) | 10.4 (5.3) |
| Median (range) | 4 (1-14) | 9.3 (2.5-22.9) |
| Mean difference (95% CI) | 0.8 (−0.5 to 2.1) | 0.8 (−2.2 to 3.9) |
| Per year of surveillance in patients with recurrence | ||
| No symptoms (n = 14) | ||
| Mean (SD) | 10.3 (7.5) | 23.8 (9.3) |
| Median (range) | 8 (2-17) | 23.4 (8.3-40.0) |
| Symptoms (n = 13) | ||
| Mean (SD) | 7.1 (5.3) | 16.5 (11.6) |
| Median (range) | 8 (1-18) | 19.2 (1.5-32.8) |
| Mean difference (95% CI) | −3.2 (−8.4 to 2.0) | −7.4 (−15.7 to 0.9) |