Table 3.
Group Comparisons on Capacity to Consent to Research Instrument Consent Standards
| Variable | Range | Healthy Controls (n = 17) | Patients With Brain Metastasis (n = 61) | Patients With Non-CNS Metastasis (n = 41) | F | df | P |
|---|---|---|---|---|---|---|---|
| Expressing choice | 1-2 | 2.0 (0.00) | 1.98 (0.13) | 1.93 (0.26) | 1.56 | 2 | .214 |
| Appreciation | 0-4 | 3.41 (0.87) | 2.74 (1.22) | 2.56 (1.26) | 3.09 | 2 | .049 |
| Reasoning | 0-12 | 5.41 (2.62) | 2.86 (2.09)a | 3.21 (2.06)a | 9.31 | 2 | < .001 |
| Understanding | 13-87 | 66.47 (13.02) | 54.00 (15.57)a | 56.97 (14.8) | 4.60 | 2 | .012 |
Unless otherwise indicated, values are mean (SD).
aSignificantly different from controls at P = .017 following Bonferroni correction.