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. Author manuscript; available in PMC: 2023 Jun 1.
Published in final edited form as: Neuromodulation. 2021 Jul 12;25(4):569–577. doi: 10.1111/ner.13495

Table 2.

Model Comparison Results

Model logLik Deviance χ2 df p-value
LnMEP ~ Age + (1 | Subj_ID) −3728.9 7457.7
LnMEP ~ Age + Time + (1 | Subj_ID) −3682.5 7365.1 92.62 4 < .001
LnMEP ~ Age + Time + BDNF + (1 | Subj_ID) −3682.3 7364.6 0.51 1 0.47
LnMEP ~ Age + Time*BDNF + (1 | Subj_ID) −3619.7 7239.5 125.6 5 < .001

Note. The first row represents the base model, which includes covariates only. Subsequent rows illustrate the model comparison results after adding the fixed effect of interest highlighted in bold. Subsequent models are compared to the last significant model.

Abbreviations: logLik = log-likelihood test; χ2 = chi-squared test statistic; df = degrees of freedom; LnMEP = log-transformed motor-evoked potential; Time = time point (baseline vs. 0, 10, 20, and 30 minutes post-cTBS); BDNF = brain-derived neurotropic factor (Val66Val vs. Val66Met); (1 | Subj_ID) = random effects structure representing the inclusion of a by-participant random intercept.