Figure 1
Changes in cigarette consumption over time in both stimulation group (active, N = 17, and sham, N = 12). Cigarette consumption consisted in the day-by-day reported number of cigarettes smoked. The lines show the predicted values from the linear mixed-effects model. Dots show means from the data. Active stimulation is represented in black and sham stimulation is represented in grey. Values at Day 0 represent the baseline cigarette intake the day before the beginning of stimulation. Values at Day 1 to Day 5 represent the cigarette intake during the stimulation’s course (2 sessions by day). Values at Day 6 to Day 28 during the follow-up assessment. The figure has been plotted using R software [v.3.4.3] (R Core Team25. R: A Language and Environment for Statistical Computing, R Foundation for Statistical Computing, Vienna, Austria. https://www.R-project.org).
