Fig. 3

Relationships between primary outcome (depression severity), mean age, and stimulation intensity. a. Depression severity vs. mean age in all studies with either coil (F8-coil and H1-coil). b. Depression severity vs. stimulation intensity (%MT) in all studies with either coil. c. Depression severity vs. stimulation intensity (%MT) in studies with F8-coil. Note. Figures a-c are scatterplots of random-effects meta-regressions. All plots show the relationships between depression severity expressed as weighted effect sizes in each study (Hedges’ g depicted as circles- the larger the circle, the higher the study weight) on the Y-axes and predictors on the X-axes (mean age of all patients per study or stimulation intensity per study). Outlier studies were excluded from the analyses. Abbreviations: DTMS, deep transcranial magnetic stimulation; F8, figure-of-eight coil (rTMS); H1, H1-coil (DTMS); Hedges’ g (effect size), standardised paired difference in means corrected for the sample size; %MT, percent of the resting motor threshold; rTMS, repetitive transcranial magnetic stimulation