Table 1.
Test accuracy of the pilot questionnaire items and other informationa
| sensitivity (95% ci) | specificity (95% ci) | |
|---|---|---|
| Items of pilot questionnaire | ||
| 1. Were you shocked by current behavior of pt? | 50.0 (27.2–72.8) | 45.1 (34.1–56.5) |
| 2. Since when do you spend more time on pt? | 75.0 (50.9–91.3) | 39.0 (28.4–50.4) |
| 3. Did the symptoms develop in a short time? | 40.0 (19.1–63.9) | 78.0 (67.5–86.4) |
| 4a. Can you tell the exact day/week of onset? | 80.0 (56.3–94.3) | 43.9 (33.0–55.3) |
| 4b. Duration of symptoms <6 months? | 55.0 (31.5–76.9) | 72.0 (60.9–81.3) |
| 5. Does symptom severity fluctuate in a day? | 70.0 (45.7–88.1) | 46.3 (35.3–57.7) |
| 6. Is pt sometimes less alert? | 75.0 (50.9–91.3) | 35.4 (25.1–46.7) |
| 7. Is pt sometimes like you knew him/her before? | 85.1 (62.1–96.8) | 45.1 (34.1–56.5) |
| 8. Is the behavior of the pt fickle? | 75.0 (50.9–91.3) | 42.7 (31.8–54.1) |
| 9. Does pt tell stories you cannot follow? | 55.0 (31.5–76.9) | 65.9 (54.6–76.0) |
| 10. Is pt sometimes restless or more physically active than normal? | 40.0 (19.1–63.9) | 64.6 (53.3–74.9) |
| 11. Or is (s)he calmer or more inactive? | 45.0 (23.1–68.5) | 59.8 (48.3–70.4) |
| 12. Does pt destroy or throw away valuable goods? | 15.0 (3.21–37.9) | 82.9 (73.0–90.3) |
| 13. Does pt act more chaotic? | 60.0 (36.1–80.9) | 47.6 (36.4–58.9) |
| 14. Has the sleeping pattern changed? | 80.0 (56.3–94.3) | 42.7 (31.8–54.1) |
| 15. Did the physical health change? | 55.0 (31.5–76.9) | 50.0 (38.7–61.3) |
| 16. Did the use of medication change? | 65.0 (40.8–84.6) | 58.5 (47.1–69.3) |
| 17. Can you handle the current situation much longer? (no = screen-positive) | 80.0 (56.3–94.3) | 25.6 (16.6–36.4) |
| Combined items | ||
| Item 7 or 4 positive | 95 (75.1–99.9) | 24.4 (15.6–35.1) |
| Item 7 or 14 positive | 100 (83.2–100) | 20.7 (12.6–31.1) |
| Item 7 or 17 positive | 95.0 (75.1–99.9) | 17.1 (9.7–27.0) |
| Other information available at referral | ||
| DRS-R-98 item 2 hallucinations | 35.0 (15.4–59.2) | 90.8 (81.0–96.5) |
| DRS-R-98 item 3 delusions | 50.0 (27.2–72.8) | 84.6 (73.5–92.4) |
| History of dementia | 15.0 (3.2–37.9) | 89.2 (79.1–95.6) |
| History of delirium | 15.0 (3.2–37.9) | 98.5 (91.7–100) |
| Recent hospitalizationb | 25.0 (8.7–49.1) | 95.4 (87.1–99.0) |
| Combined items | ||
| DRS item 2 or DRS item 3 positive | 60.0 (36.1–80.9) | 83.1 (71.7–91.2) |
| History of delirium or recent hospitalization positive | 35.0 (15.4–59.2) | 93.8 (88.0–98.7) |
| DRS item 2, DRS item 3, history of delirium or recent hospitalization positive | 80.0 (56.3–94.3) | 76.9 (64.8–86.5) |
Pt, patient.
a
n = 102.
b
Within 3 months.