Table 3:
Standardized measurement slopes (factor loadings) for unidimensional and bi-factor measurement models of delirium severity. Better Assessment of Illness (BASIL) study, N = 352 patients and n = 1,117 patient assessments.
| Factor loadings | ||||||
|---|---|---|---|---|---|---|
| Domain | Feature | f | fb | sb | LF | |
| LOC | Consciousness fluctuates | .74 | .77 | .69 | s1 | |
| LOC | Level of consciousness (camlf4a) | .71 | .72 | .62 | s1 | * |
| LOC | Exaggerated startle response | .58 | .62 | −.37 | s1 | * |
| INA | Inattentive to conversation | .87 | .81 | .52 | s2 | |
| INA | Difficulty focusing attention | .81 | .76 | .35 | s2 | * |
| INA | Easily distracted | .70 | .64 | .40 | s2 | * |
| DTH | Disorganized thinking evident from speech | .88 | .92 | * | ||
| DIS | Disorientation to time or place | .71 | .74 | * | ||
| DIS | Self-report feeling confused in the past day | .67 | .70 | * | ||
| ANX | Talks about feeling threatened | .49 | .42 | .79 | s3 | * |
| ANX | Acts as if frightened | .49 | .40 | .79 | s3 | * |
| ANX | Asks repeated questions | .44 | .40 | 1.00 | s3 | |
| PER | Self-report see things not really there | .72 | .54 | 1.00 | s4 | * |
| PER | Self-report hear things not really there | .71 | .62 | .42 | s4 | * |
| PER | Self-report misperception motion | .71 | .56 | .52 | s4 | * |
| PER | Self-report distortion | .70 | .61 | .46 | s4 | * |
| PER | Beliefs that are not true | .63 | .64 | .08 | s4 | * |
| PER | Self-report misperception sound or object | .57 | .50 | .40 | s4 | * |
| PM | Increased motor activity | .60 | .62 | * | ||
| PM | Decreased motor activity | .44 | .45 | * | ||
| FUN | Disturbance of sleep-wake cycle | .46 | .48 | |||
| Omega | .94 | .93 | .93 | |||
| RMSEA | .04 | .03 | - | |||
| CFI | .92 | .95 | - | |||
| SRMR | .15 | .13 | - | |||
Notes/abbreviations: f, loading and model fits in single factor model; fb, sb, loadings on general (fb) and specific (sb) factors in bifactor model; Omega refers to McDonald’s coefficient for internal consistency reliability; CFI, Confirmatory Fit Index where values of 0.95 or greater are considered good; RMSEA, root mean squared error of approximation where values below 0.05 are considered good; SRMR, standardized root mean squared residual, where values below 0.08 are considered good; LF, long form indicates with “*” whether the item is retained for recommended long form; Domain abbreviations are LOC, level of consciousness; INA, inattention; DTH, disorganized thinking; DIS, disorientation; ANX, anxiety; PER, perceptual disturbance, delusion; PM, psychomotor symptoms; FUN, functional.