Table 3.
Results of Logistic Regression Analyses
| DAFS Variables | Sensitivity | Specificity | Overall Classification | Odds Ratio | Wald χ2 | P Value |
|---|---|---|---|---|---|---|
| Tell time | 26.5% | 94.1% | 61.0% | 0.92 | 4.78 | .03 |
| Orientation to date | 42.9% | 94.1% | 69.0% | 0.96 | 9.48 | .002 |
| Telephone skills | 51.0% | 64.02% | 57.8% | 0.95 | 6.10 | .01 |
| Mailing a letter | 51.0% | 83.0% | 67.6% | 0.95 | 10.12 | .001 |
| ID road signs | 34.7% | 90.6% | 63.7% | 0.91 | 5.67 | .02 |
| Driving rules | 40.8% | 86.8% | 64.7% | 0.97 | 8.63 | .003 |
| ID currency | 8.2% | 100.0 | 55.9% | 0.24 | 0.01 | ns |
| Count currency | 34.7% | 98.1% | 6.6% | 0.91 | 5.73 | .02 |
| Write check | 75.0% | 77.4% | 76.2% | 0.96 | 5.76 | .02 |
| Balance checkbook | 81.3% | 75.5% | 78.2% | 0.98 | 9.82 | .002 |
| Shopping (free recall) | 81.6% | 83.0% | 82.4% | 0.95 | 29.59 | <.001 |
| Shopping (recognition) | 69.4% | 90.6% | 80.4% | 0.95 | 23.34 | <.001 |
| Shopping (with a list) | 14.3% | 100.0% | 58.8% | 0.92 | 3.49 | ns |
| Making change | 38.8% | 92.5% | 66.7% | 7.76 | 11.78 | .001 |
Abbreviations: ns, not statistically significant; AD, Alzheimer disease; DAFS, Direct Assessment of Functional Status.