| item | content | correct answer | Number of correct answers n (%) | Expert Content Validity Assessment |
| Risk factor dimension: Which of the following patients do you think may be at risk for delirium? | 0.866 | |||
| 1 | Older patients (compared to younger patients) | yes | 199 (92.99) | 0.94 |
| 2 | Married patients (compared to unmarried) | no | 85 (39.72) | 0.78 |
| 3 | patients with dementia | yes | 154 (71.96) | 0.94 |
| 4 | infected patients | yes | 184 (85.98) | 0.94 |
| 5 | Patients with an above high school degree | no | 162 (75.70) | 0.72 |
| 6 | Patients who have recently undergone surgery | yes | 187 (87.38) | 0.86 |
| 7 | Patients who experience dehydration (lack of water) | yes | 169 (78.97) | 0.89 |
| 8 | Patients with changes in their surroundings, such as hospital admissions or transfers | yes | 166 (77.57) | 0.92 |
| 9 | Patients receiving mechanical ventilation or endotracheal intubation | yes | 185 (86.45) | 1.00 |
| 10 | Patients starting a new drug | yes | 161 (75.23) | 0.67 |
| Action Dimension: What would you do if your family members (patients) suddenly showed signs of mental confusion? | 0.787 | |||
| 11 | Guide patients to adapt to normal time, day and night rhythms, and bring photos from home to aid their memory. | yes | 201 (93.93) | 0.97 |
| 12 | Wait 24 hours to see if the patient gets better | no | 55 (25.70) | 0.58 |
| 13 | Let the patient sleep during the day to facilitate his recovery. | no | 91 (42.52) | 0.67 |
| 14 | do nothing | no | 204 (95.33) | 0.56 |
| 15 | Immediately notify the bed nurse or other medical staff | yes | 210 (98.13) | 0.97 |
| 16 | Ask the healthcare provider if the patient’s medication has changed | yes | 206 (96.26) | 0.97 |
| Symptom dimension: Which of the following descriptions do you think may have developed delirium? | 0.934 | |||
| 17 | Confusion progresses over several months, becoming forgetful, having difficulty concentrating, and becoming more confused by the evening of the day | no | 50 (23.36) | 0.89 |
| 18 | The patient gradually became more confused over several months, became forgetful, had difficulty concentrating, and saw things that were not there in the evening of the day | no | 63 (29.44) | 0.94 |
| 19 | The patient suddenly becomes confused within days or hours. During the day, the state of mental confusion comes and goes, difficulty concentrating, seeing things that are not there | yes | 166 (77.57) | 1.00 |
| 20 | Sudden confusion within days or hours, difficulty concentrating and increased daytime sleepiness | yes | 163 (76.17) | 0.92 |
| 21 | The patient becomes more confused within a few days and suddenly cannot go to the toilet in time (uncontrollable bowel movements) | yes | 159 (74.30) | 0.92 |