TABLE 1.
Regression Modeling of the Association of the 3 Main Variables with ICP Monitor Insertion
| Effect | OR | P | Lower | Upper |
|---|---|---|---|---|
| Regression modeling for GCStotal matrix—likelihood of placing an ICP monitor | ||||
| Survey ID | <.001 | |||
| GCS total | <.001 | |||
| 9 to 12 (vs 13-15) | 5.85 | <.001 | 4.78 | 7.16 |
| 6 to 8 (vs 13-15) | 98.79 | <.001 | 74.06 | 131.78 |
| 4 to 5 (vs 13-15) | 133.09 | <.001 | 98.06 | 180.60 |
| 3 (vs 13-15) | 49.59 | <.001 | 38.41 | 64.04 |
| Marshall | <.001 | |||
| DI II (vs DI I) | 2.67 | <.001 | 1.99 | 3.59 |
| DI III (vs DI I) | 6.42 | <.001 | 4.70 | 8.76 |
| DI IV (vs DI I) | 8.02 | <.001 | 5.85 | 11.01 |
| NEML (vs DI I) | 2.43 | <.001 | 1.82 | 3.26 |
| EML/DI I (vs DI I) | 4.40 | <.001 | 3.25 | 5.95 |
| EML/DI II (vs DI I) | 9.99 | <.001 | 7.23 | 13.79 |
| EML/DI III (vs DI I) | 11.74 | <.001 | 8.47 | 16.29 |
| EML/DI IV (vs DI I) | 6.91 | <.001 | 5.05 | 9.45 |
| Pupils | <.001 | |||
| Unexaminable (vs normal) | 1.30 | .013 | 1.06 | 1.60 |
| Unequal (vs normal) | 2.27 | <.001 | 1.84 | 2.81 |
| Bilateral (vs normal) | 1.31 | .011 | 1.06 | 1.61 |
| Regression modeling for GCSMotor matrix—likelihood of placing an ICP monitor | ||||
| Survey ID | <.001 | |||
| GCS motor | <.001 | |||
| 5 (vs 6) | 7.11 | <.001 | 5.85 | 8.64 |
| 4 (vs 6) | 27.89 | <.001 | 22.02 | 35.33 |
| 2 to 3 (vs 6) | 63.98 | <.001 | 48.49 | 84.41 |
| 1 (vs 6) | 29.17 | <.001 | 22.99 | 37.00 |
| Marshall | <.001 | |||
| DI II (vs DI I) | 3.25 | <.001 | 2.49 | 4.24 |
| DI III (vs DI I) | 8.93 | <.001 | 6.67 | 11.95 |
| DI IV (vs DI I) | 13.23 | <.001 | 9.75 | 17.95 |
| NEML (vs DI I) | 3.43 | <.001 | 2.62 | 4.48 |
| EML/DI I (vs DI I) | 6.26 | <.001 | 4.72 | 8.29 |
| EML/DI II (vs DI I) | 12.51 | <.001 | 9.24 | 16.95 |
| EML/DI III (vs DI I) | 16.92 | <.001 | 12.34 | 23.20 |
| EML/DI IV (vs DI I) | 9.56 | <.001 | 7.13 | 12.83 |
| Pupils | <.001 | |||
| Unexaminable (vs normal) | 1.53 | <.001 | 1.26 | 1.85 |
| Unequal (vs normal) | 2.69 | <.001 | 2.20 | 3.30 |
| Bilateral (vs normal) | 1.74 | <.001 | 1.43 | 2.11 |
DI, diffuse injury; EML, evacuated mass lesions; GCS, Glasgow Coma Scale; ICP, intracranial pressure; NEML, nonevacuated mass lesions
DI I, diffuse injury I (“no visible intracranial pathology seen on CT scan”)13; DI II, diffuse injury II (“cisterns are present with midline shift of 0 to 5 mm and/or: lesion densities present; no high-density or mixed-density lesion >25 cc; may include bone fragments and foreign bodies”)13; DI III, diffuse injury III (“cisterns compressed or absent with midline shift 0 to 5 mm, no high-density or mixed-density lesion >25 cc”)13; DI IV, diffuse injury IV (“midline shift >5 mm, no high-density or mixed-density lesion >25 cc”)13; EML, evacuated mass lesion (“any lesion surgically evacuated”)13; NEML, nonevacuated mass lesion (“high-density or mixed-density lesion >25 cc, not surgically evacuated”)13