Table 3. Multivariable regression model of ED and patient factors associated with performance of CT among all 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 |
| Pediatric level 1 | 1.15 (1.09, 1.21) | 0.93 (0.88, 0.98) | 0.23 (0.19, 0.27) | 0.43 (0.29, 0.64) | 1.23 (1.01, 1.50) |
| Level 1 | 1.17 (1.07, 1.28) | 1.11 (1.01, 1.22) | 2.03 (1.77, 2.32) | 11.25 (8.65, 14. 62) | 5.38 (4.41, 6.56) |
| Level 2 or 3 | 1.42 (1.30, 1.54) | 1.33 (1.22, 1.46) | 2.36 (2.07, 2.70) | 4.1 (2.96, 5.69) | 2.69 (2.11, 3.42) |
| Patient characteristics | |||||
| Age | |||||
| <1 year | Referent | Referent | Referent | Referent | Referent |
| 1-4 years | 0.30 (0.27, 0.33) | 0.26 (0.23, 0.29) | 1.12 (0.56, 2.26) | 2.05 (0.26, 16.30) | 1.09 (0.47, 2.51) |
| 5-9 years | 0.32 (0.29, 0.36) | 0.23 (0.21, 0.26) | 1.93 (0.97, 3.85) | 2.88 (0.37, 22.58) | 3.15 (1.41, 7.02) |
| 10-14 years | 0.48 (0.43, 0.54) | 0.34 (0.31, 0.38) | 4.21 (2.15, 8.25) | 6.39 (0.85, 48.16) | 4.60 (2.09, 10.11) |
| 15-18 years | 0.77 (0.69, 0.85) | 0.53 (0.47, 0.59) | 8.41 (4.30, 16.46) | 19.87 (2.66, 148.71) | 8.66 (3.94, 19.04) |
| Male | 1.25 (1.20, 1.31) | 1.20 (1.14, 1.26) | 1.10 (0.99, 1.21) | 1.45 (1.18, 1.80) | 1.34 (1.15, 1.55) |
| Non-White or Hispanic1 | 0.70 (0.66, 0.75) | 0.67 (0.63, 0.72) | 0.56 (0.48, 0.64) | 0.66 (0.51, 0.85) | 0.57 (0.47, 0.69) |
| Insurance status | |||||
| Private | Referent | Referent | Referent | Referent | Referent |
| Medicaid | 0.90 (0.86, 0.95) | 0.89 (0.84, 0.95) | 0.80 (0.71, 0.90) | 0.89 (0.79, 1.15) | 0.94 (0.79, 1.12) |
| Self-pay | 0.78 (0.68, 0.89) | 0.81 (0.70, 0.93) | 0.93 (0.71, 1.21) | 0.57 (0.29, 1.10) | 0.86 (0.56, 1.33) |
| Other | 3.50 (3.18, 3.85) | 3.73 (3.38, 4.12) | 6.38 (5.58, 7.29) | 8.52 (6.70, 10.84) | 7.81 (6.52, 9.37) |
| ISS | |||||
| ≤8 | Referent | Referent | Referent | Referent | Referent |
| 9-15 | 5.88 (5.19, 6.67) | 4.92 (4.31, 5.62) | 6.89 (5.46, 8.70) | 20.17 (14.88, 27.32) | 12.56 (10.04, 15.71) |
| >15 | 10.31 (8.10, 13.10) | 9.52 (7.51, 12.07) | 12.90 (8.89, 18.72) | 30.27 (18.95, 48.34) | 21.36 (15.15, 30.10) |
| Diagnosis of abuse2 | 1.30 (1.03, 1.67) | 1.52 (1.18, 1.96) | 1.94 (0.84, 4.44) | 3.06 (0.72, 13.08) | 2.14 (0.98, 4.71) |
1
Non-White defined as Black, non-Hispanic, or Other compared to White as the referent group
2
ICD9-CM diagnosis codes: 995.5-995.59, 995.80-995.85