Equal shaft weights changed repeat agreement of top 10 percent early gamma lists in 5 of 32 SEEG patients

We tested two global signal references in public OpenNeuro ds004100, version 1.1.3. We used the first two selected seizures from each of 32 patients. The main lists contained the highest 10 percent of contact scores for early gamma power change. Equal shaft weights changed repeat agreement in five patients. Mean agreement was 47.67 percent with equal contact weights and 48.01 percent with equal shaft weights. The mean change was +0.34 percentage points. The 95 percent patient bootstrap interval was -0.88 to +1.66 percentage points. The two-sided patient sign-flip test gave p = 0.6881. This test did not establish a mean improvement. The interval does not prove equal performance. The inference requires independent patient effects and the stated bootstrap and sign-flip assumptions. This study reuses a prior cohort and is an exploratory secondary analysis. The package supplies new compact band matrices for all 64 records, code, exact results, a fixed local analysis plan, source versions and hashes, and repeat instructions. Independent EDF and spectral tools checked 131,178 source band power values. A second analysis reproduced all eight numerical result files exactly. A software control confirmed that complete duplication of one named shaft leaves the equal shaft reference unchanged when source signals and candidate contacts stay fixed. The study did not test clinical benefit.

SEEG · intracranial EEG · epilepsy · gamma power · signal reference · equal shaft weights · repeat agreement · contact ranking