Table 3.
Factor analysis (maximum likehood) with varimax rotation showing factor structure of CIWA-Ar (N = 201) at 36 hours.
| CIWA-Ar items | Factor loading | % positive |
Item scores |
|||
|---|---|---|---|---|---|---|
| Delirious | Autonomic | Nonspecific | Mean | SD | ||
| Tactile disturbances | .999 | 65.7 | 2.26 | 2.20 | ||
| Auditory disturbances | .873 | .150 | .163 | 75.1 | 3.35 | 2.54 |
| Orientation and clouding of sensorium | .851 | −.137 | 49.3 | 1.06 | 1.30 | |
| Agitation | .777 | .120 | 80 | 3.30 | 2.06 | |
| Anxiety | .998 | 91 | 2.96 | 1.92 | ||
| Paroxysmal sweats | .660 | .277 | 75 | 1.05 | .86 | |
| Tremor | .528 | .211 | 94.5 | 4.63 | 1.78 | |
| Headache and fullness in head | .172 | .245 | 12.9 | .18 | .49 | |
| Nausea and vomiting | −.156 | .375 | .516 | 58.7 | .93 | .95 |
| Visual disturbances | .233 | .275 | 53.2 | .72 | .90 | |
| Eigenvalue | 3.4 | 2.4 | 1 | |||
| Variance (%) | 34.34 | 24.25 | 10.04 | Total = 68.74 | ||
| Factor mean (SD) | 9.97 (7.4) | 8.81 (3.96) | 1.64 (1.41) | |||
| Cronbach's alpha | .91 | .66 | .26 | |||