Table 2.
Agreement between Research Nurse Measurement and Bedside Nurse Measurement of Delirium Within Two Hours of Each Other
| Patient Characteristic | N | Weighted Kappa (95% CI) |
|---|---|---|
| All Matched Assessments | 6062 | 0.67 (0.66, 0.70) |
| Unit-Specific Assessments | ||
| Medical | 3182 | 0.73 (0.70, 0.75) |
| Surgical | 2880 | 0.60 (0.57, 0.63) |
| Medical Subgroups | ||
| Patient is Mechanically Ventilated | 4346 | 0.60 (0.57, 0.62) |
| Cognitively Impaired at Baseline* | 764 | 0.70 (0.66, 0.76) |
| History of Depression | 2346 | 0.66 (0.62, 0.70) |
| APACHE† Acute Physiology Score, Quintile (Score) | ||
| Quartile 1 (<12) | 1178 | 0.68 (0.61, 0.73) |
| Quartile 2 (12–15) | 1178 | 0.68 (0.61, 0.73) |
| Quartile 3 (16–20) | 1720 | 0.66 (0.63, 0.70) |
| Quartile 4 (21 or greater) | 1837 | 0.68 (0.64, 0.71) |
| Age Groups | ||
| < 65 | 4031 | 0.71 (0.68, 0.73) |
| ≥ 65 | 2031 | 0.59 (0.55, 0.63) |
| Year of Data Collection | ||
| 2007 | 1656 | 0.65 (0.60, 0.68) |
| 2008 | 1640 | 0.70 (0.66, 0.74) |
| 2009 | 2014 | 0.67 (0.62, 0.71) |
| 2010 | 752 | 0.67 (0.60, 0.73) |
*
Cognitively impaired is defined as an IQCODE score of > 3.3
†
APACHE: Acute Physiology and Chronic Health Evaluation