Table 4.
Agreement characteristics between the ‘proxy’ measures and the actual Deficit Syndrome status. Characteristics include percent agreement, sensitivity, specificity, false positive rate and kappa.
| UNDER ESTIMATE | OVER ESTIMATE | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Variable | Cases | Agree. | Sen. | Spec. | False Positives | kappa | Cases | Agree. | SEN. | SPEC. | False Positives | Kappa |
| PDS1 | 36 | 78.2% | 52.3% | 88.4% | 11.6% | .43 | 51 | 73.7% | 61.4% | 78.6% | 21.4% | .38 |
| PDS2 | 29 | 80.2% | 47.7% | 92.9% | 7.1% | .45 | 61 | 81.5% | 86.4% | 79.5% | 20.5% | .59 |
| Blunted Affect | 23 | 81.4% | 43.2% | 96.4% | 3.6% | .46 | 54 | 77.0% | 70.5% | 79.5% | 20.5% | .47 |
| Emotional With. | 17 | 71.1% | 18.2% | 92.0% | 8.0% | .13 | 50 | 75.6% | 63.6% | 80.4% | 19.6% | .42 |
| Factor 2 | 42 | 75.7% | 54.5% | 83.9% | 16.1% | .39 | 59 | 78.8% | 79.5% | 78.6% | 21.4% | .53 |
| DSCAT | 42 | 79.5% | 61.4% | 86.6% | 13.4% | .49 | ||||||
| PROXYDS | 44 | 78.2% | 52.3% | 88.4% | 11.6% | .43 | ||||||
| PANSS Negative | 45 | 77.6% | 61.4% | 83.9% | 16.1% | .45 | ||||||
NB: Factor 2, DSCAT, PROXYDS, and the PANSS Negative cutpoints predicted estimates close to the actual N of 44 cases with Deficit Syndrome, therefore only one estimate was used.