Table 6.
Prevalence of AQMs by reporting parameter
| Parameter | Prevalence (%) | 95% CI | Overall comparison p-value | Multiple comparisons p-value |
|---|---|---|---|---|
| Overall | 15/761 (2.0%) | [1.2%, 3.2%] | ||
| By date: | ||||
| 4/28/11 | 7/353 (2.0%) | [1.0%, 4.0%] | > 0.9999 | |
| 10/24/11 | 8/408 (2.0%) | [1.0%, 3.8%] | ||
| By modality: | ||||
| CT | 6/511 (1.2%) | [0.6%, 2.5%] | 0.0471* | |
| MRI | 9/250 (3.6%) | [1.9%, 6.7%] | ||
| By body part: | ||||
| Body | 6/265 (2.3%) | [1.1%, 5.1%] | <0.0001* | 0.5755 |
| Breast | 1/4 (25%) | [5.3%, 71.6%] | 0.0767 | |
| Cardiac | 8/8 (100%) | [66.3%, 100%] | <0.0001* | |
| MSK | 0/85 (0%) | [0%, 4.2%] | 0.3864 | |
| Neuro | 0/370 (0%) | [0%, 1.0%] | 0.0001* | |
| Vascular | 0/29 (0%) | [0%, 11.6%] | >0.9999 | |
| By imaging site: | ||||
| Hospital-Adult | 10/468 (2.1%) | [1.2%, 3.7%] | 0.5397 | |
| Hospital-Pediatric | 0/84 (0%) | [0, 4.2%] | ||
| Community | 5/209 (2.4%) | [1.1%, 5.5%] | ||
| By scan indication: | ||||
| “Cancer follow-up” | 2/150 (1.3%) | [0.4%, 4.7%] | 0.9067 | |
| “Evaluate mass” | 1/67 (1.5%) | [0.4%, 7.9%] | ||
| Other | 12/544 (2.2%) | [1.3%, 3.8%] | ||
CI = confidence interval.
*
denotes statistically significant (incorporating Bonferroni correction for multiple comparisons)