Table 1. Primary, Subanalyses, and Sensitivity Analyses of NQF Measure Performancea.
| Pretest Probability Assessment | All Imaging | CTPA Imaging Only | ||||
|---|---|---|---|---|---|---|
|
|
|
|||||
| Potentially AI | AI Owing to No D-Dimer Testing Done | AI Owing to Negative D-Dimer Test Results | AI | AI Owing to No D-Dimer Testing Done | AI Owing to Negative D-Dimer Test Results | |
| NQF measure: (Wells score <2) | 1205 (32) | 811 (22) | 394 (11) | 1084 (32) | 716 (21) | 368 (11) |
| 95% CI | 31-34 | 21-23 | 10-12 | 30-34 | 20-23 | 10-12 |
| Modified Wells score: (Wells score <4) | 1589 (43) | 1098 (30) | 491 (13) | 1428 (43) | 966 (29) | 462 (14) |
| 95% CI | 41-44 | 28-31 | 12-14 | 41-44 | 27-30 | 13-15 |
| Clinical guideline (Wells score <6) | 1977 (33) | 1410 (24) | 567 (10) | 1773 (53) | 1245 (37) | 528 (16) |
| 95% CI | 32-35 | 23-25 | 9-10 | 51-55 | 36-39 | 15-17 |
| Clinical gestalt: lowb | 1090 (29) | 740 (20) | 350 (10) | 977 (29) | 653 (20) | 324 (10) |
| 95% CI | 28-31 | 19-21 | 9-10 | 28-31 | 18-21 | 9-11 |
Abbreviations: AI, avoidable imaging; CTPA, computed tomography of the pulmonary arteries; NQF, National Quality Forum.
a
Data are given as number (percentage). Percentages apply to the number of all hemodynamically patients undergoing imaging, in accordance with the NQF measure.
b
Does not include 5 patients for whom gestalt pretest probability assessment was not available.