Table 2.
Cancellation Rates With and Without Duplication Decision Support (DDS) With Comparison to Control Group
| Practice Setting | No. (%)
|
OR (95% CI)a | |||
|---|---|---|---|---|---|
| Total CT Orders | DDS Activation | Cancellation
|
|||
| DDS | Control | ||||
| Primary care clinic | 1911 (5.8) | 102 (5.3) | 21 (20.6) | 24 (1.3) | 19.3 (10.3–36.1) |
| Medical specialty clinic | 2376 (7.2) | 410 (17.3) | 62 (15.1) | 24 (1.2) | 14.4 (8.9–23.4) |
| Inpatient units | 7645 (23.3) | 2688 (35.2) | 156 (5.8) | 25 (0.5) | 12.2 (8.0–18.6) |
| Emergency department | 5776 (17.6) | 600 (10.4) | 44 (7.3) | 36 (0.7) | 11.3 (7.2–17.7) |
| Outpatient cancer center | 10 938 (33.3) | 5231 (47.8) | 251 (4.8) | 50 (0.9) | 5.7 (4.2–7.7) |
| Surgical specialty clinic | 4212 (12.8) | 2043 (48.5) | 127 (6.2) | 35 (1.5) | 4.0 (2.8–5.9) |
| Total | 32 858 (100) | 11 074 (33.9) | 661 (6.0) | 194 (0.9) | 7.1 (6.0–8.3) |
Abbreviations: CT, computed tomographic; OR, odds ratio.
a
P <.001 for all comparisons.