Table 4.
Metric comparison between different phases of CAP (Plans 2–4)
| Metric | Estimate (95% confidence interval) | p value* | ||
|---|---|---|---|---|
| Plan 2 | Plan 3 | Plan 4 | ||
| Length (mm) | 43.65 (39.39, 47.92) | 44.41 (40.15, 48.68) | 43.16 (38.90, 47.44) | 0.772 |
| Drilling angle (deg.) | 18.85 (16.53, 21.18) | 19.36 (17.04, 21.68) | 18.84 (16.52, 21.16) | 0.885 |
| GM sampling ratio | 0.37 (0.30, 0.45) | 0.39 (0.31, 0.46) | 0.37 (0.30, 0.45) | 0.704 |
| Risk score | 0.90 (0.84, 0.96) | 0.96 (0.90, 1.02) | 1.01 (0.95, 1.07) | 0.00023 |
| Minimum distance from critical structure (mm) | 2.76 (2.45, 3.07) | 2.36 (2.05, 2.67) | 2.23 (1.92, 2.54) | 0.001 |
Estimates for each metric by group from mixed-effects ANOVA models that include patient-level random effects to account for within-patient clustering of electrodes. *p values are shown for likelihood ratio tests of the null hypothesis of no difference in the corresponding outcome variable between plans 2 and 4