Performance of CART Models for Outcomes of Abnormal CT Finding, Abnormal Antral Puncture Fluid Finding, and Abnormal Bacterial Culture
| Reference Standard | Sinusitis/Total No. (%) | Likelihood Ratio |
|---|---|---|
| Abnormal CT finding | ||
| Low risk (−2 to 1) | 13/42 (31) | 0.20 |
| Moderate risk (2 to 4) | 42/60 (70) | 1.07 |
| High risk (5 to 9) | 65/73 (89) | 3.72 |
| Total | 120/175 (69) | |
| AUROCC | 0.795 | |
| Classified as low or high risk | 115/175 | |
| Abnormal antral puncture finding | ||
| Low risk (−2 to 0) | 13/56 (23) | 0.28 |
| Moderate risk (1 to 4) | 36/67 (54) | 1.07 |
| High risk (5 to 6) | 42/52 (81) | 3.88 |
| Total | 91/175 (52) | |
| AUROCC | 0.772 | |
| Classified as low or high risk | 108/175 | |
| Positive bacterial culture | ||
| Low risk (−1 to 3) | 13/77 (17) | 0.38 |
| Moderate risk (4 to 6) | 33/75 (44) | 1.47 |
| High risk (7 to 8) | 15/23 (65) | 3.50 |
| Total | 61/175 (35) | |
| AUROCC | 0.731 | |
| Classified as low or high risk | 100/175 |
AUROCC = area under the receiver operating characteristic curve; CART = classification and regression tree; CT = computed tomography.