Table. Head Computed Tomography Examinations Ordered for Specific Psychiatric Presentations in Differing Settingsa.
| Presentation | Computed tomography examinations ordered, No. (%) | |
|---|---|---|
| Isolated psychiatric presentations (n = 350)b | With concurrent psychiatric presentations (n = 369)c | |
| Hallucinations | 223 (63.7) | 232 (62.3) |
| Delusions | 15 (4.3) | 21 (5.7) |
| Paranoia | 6 (1.7) | 17 (4.6) |
| Catatonia | 7 (2.0) | 7 (1.9) |
| Other or unspecified psychotic symptoms | 65 (18.6) | 73 (19.8) |
| Ideation | ||
| Suicidal | 30 (8.6) | 32 (8.7) |
| Homicidal | 4 (1.1) | 6 (1.6) |
| Multiple psychiatric symptoms | NA | 19 (5.2) |
| Setting | ||
| All emergency department | NA | 297 (80.5) |
| All inpatient | NA | 72 (19.5) |
Abbreviations: ED, emergency department; NA, not applicable.
a
The numbers of examinations for each isolated presentation and when counting patients with other psychiatric presentations are given. The number of patients in ED and inpatient settings is also provided. The yield for acute or explanatory pathology in all scenarios was 0%.
b
Percentages differ from those given in the Results, in which isolated symptoms are given as a percentage of all cases rather than only cases with isolated symptoms.
c
The 19 examinations performed for more than 1 psychiatric indication were counted toward each component presentation in the indication-specific analysis. Therefore, the indication-specific analyses sum to more than the total number of patients.