Table 2. Multivariable regression model of ED and patient factors associated with performance of CT among non-pediatric EDs.
| Any CT Adjusted OR (95%CI) | Head CT Adjusted OR (95%CI) | C-spine CT Adjusted OR (95%CI) | Chest CT Adjusted OR (95%CI) | Abdomen CT Adjusted OR (95%CI) | |
|---|---|---|---|---|---|
| ED characteristics | |||||
| Trauma designation | |||||
| Not a trauma center | Referent | Referent | Referent | Referent | Referent |
| Level 1 | 1.54 (1.18, 2.00) | 1.49 (1.11, 2.00) | 3.43 (2.10, 5.58) | 75.62 (10.49, 545.00) | 20.94 (6.60, 66.37) |
| Level 2 or 3 | 1.31 (1.15, 1.49) | 1.34 (1.17, 1.54) | 3.47 (2.65, 4.54) | 2.06 (1.23, 3.44) | 2.79 (1.77, 4.39) |
| Non-academic ED | 1.51 (1.16, 1.96) | 1.54 (1.15, 2.06) | 1.84 (1.12, 3.02) | 4.62 (0.62, 34.49) | 3.88 (1.20, 12.54) |
| Annual pediatric volume | |||||
| 1st quartile | Referent | Referent | Referent | Referent | Referent |
| 2nd quartile | 1.03 (0.91, 1.16) | 1.05 (0.93, 1.20) | 1.05 (0.87, 1.28) | 0.92 (0.55, 1.53) | 0.82 (0.59, 1.14) |
| 3rd quartile | 1.33 (1.19, 1.48) | 1.39 (1.23, 1.56) | 1.10 (0.93, 1.30) | 0.37 (0.29, 0.49) | 0.54 (0.43, 0.68) |
| 4th quartile | 1.28 (1.11, 1.48) | 1.20 (1.03, 1.41) | 0.68 (0.51, 0.92) | 1.67 (0.91, 3.09) | 0.72 (0.45, 1.18) |
| Patient characteristics | |||||
| Age | |||||
| <1 year | Referent | Referent | Referent | Referent | Referent |
| 1-4 years | 0.41 (0.31, 0.53) | 0.40 (0.30, 0.52) | 0.69 (0.31, 1.54) | 0.45 (0.05, 3.93) | 0.67 (0.08, 5.45) |
| 5-9 years | 0.59 (0.46, 0.76) | 0.49 (0.38, 0.64) | 1.43 (0.66, 3.09) | 0.85 (0.11, 6.66) | 2.94 (0.40, 21.59) |
| 10-14 years | 0.93 (0.72, 1.19) | 0.77 (0.60, 1.00) | 2.81 (1.31, 5.99) | 1.89 (0.26, 13.92) | 4.52 (0.63, 32.68) |
| 15-18 years | 1.60 (1.25, 2.05) | 1.23 (0.98, 1.61) | 5.95 (2.80, 12.65) | 6.46 (0.90, 46.69) | 11.12 (1.55, 79.77) |
| Male | 1.23 (1.15, 1.31) | 1.18 (1.10, 1.26) | 1.09 (0.98, 1.21) | 1.40 (1.12, 1.75) | 1.26 (1.05, 1.51) |
| Non-White or Hispanic1 | 0.75 (0.68, 0.82) | 0.69 (0.62, 0.76) | 0.61 (0.52, 0.72) | 0.69 (0.52, 0.90) | 0.63 (0.50, 0.81) |
| Insurance status | |||||
| Private | Referent | Referent | Referent | Referent | Referent |
| Medicaid | 0.81 (0.76, 0.88) | 0.80 (0.74, 0.87) | 0.79 (0.69, 0.90) | 0.91 (0.69, 1.20) | 0.86 (0.69, 1.08) |
| Self-pay | 0.80 (0.68, 0.94) | 0.84 (0.70, 1.00) | 0.92 (0.70, 1.21) | 0.52 (0.26, 1.04) | 0.92 (0.58, 1.47) |
| Other | 3.33 (2.97, 3.73) | 3.45 (3.06, 3.88) | 6.80 (5.91, 7.83) | 9.60 (7.43, 12.40) | 7.14 (5.76, 8.86) |
| ISS | |||||
| ≤8 | Referent | Referent | Referent | Referent | Referent |
| 9-15 | 9.48 (7.45, 12.06) | 6.51 (5.13, 8.26) | 7.89 (5.96, 10.44) | 19.03 (13.33, 27.17) | 14.93 (10.85, 20.56) |
| >15 | 9.50 (5.99, 15.05) | 9.06 (5.80, 14.16) | 8.74 (5.31, 14.39) | 11.19 (6.47, 19.35) | 8.93 (5.29, 15.08) |
1
Non-White defined as Black, non-Hispanic, or Other compared with White as the referent group