Measurement | ICU delirium tools | Patients’ clinician diagnosisa | 3 Simple orientation questions | ||||||
---|---|---|---|---|---|---|---|---|---|
CAM-ICU | ICDSC | Physician | Resident | Nurse | 1 false or absent response | 2 false or absent responses | 1 false responseb | 2 false responsesb | |
Sensitivity | 83% [71–94] | 83% [71–94] | 79% [65–94] | 68% [52–83] | 70% [54–86] | 90% [81–99] | 68% [54–83] | 78% [59–97] | 28% [7–48] |
Specificity | 100% [100–100] | 87% [78–95] | 85% [75–96] | 93% [86–100] | 89% [82–97] | 66% [54–77] | 82% [73–91] | 73% [62–85] | 92% [85–99] |
PPV | 100% [100–100] | 79% [67–91] | 79% [65–94] | 85% [72–99] | 78% [62–93] | 62% [49–74] | 70% [56–84] | 47% [29–65] | 50% [19–81] |
NPV | 91% [84–97] | 89% [82–97] | 85% [75–96] | 82% [72–92] | 85% [76–94] | 92% [84–99] | 81% [72–90] | 92% [84–99] | 81% [72–90] |
Delirium diagnosis by non experts | 31% | 40% | 41% | 31% | 31% | 56% | 37% | 38% | 13% |
by experts | 38% | 38% | 41% | 39% | 34% | 38% | 38% | 21% | 21% |
Agreement with experts (κ ± SD)c | 0.86 ± 0.05 | 0.69 ± 0.07 | 0.65 ± 0.09 | 0.63 ± 0.09 | 0.61 ± 0.09 | 0.51 ± 0.08 | 0.51 ± 0.09 | 0.41 ± 0.10 | 0.23 ± 0.13 |