Figure 1.

Modelled percentage total weight loss (%) from initial clinic visit (i.e., 1 year prior to surgery, with lifestyle modifications and medical consultations) to preoperation and year 8 post-bariatric surgery. The overall estimated marginal mean weight loss at each visit over time modelled from the mixed-effects model with random effects, taking into account the repeated measures nature of the data. Lines indicate modelled weight change from baseline based on mixed models adjusted for baseline factors (age at time of surgery, sex and race). A negative value represents weight loss based on pre-surgery weight. Data markers (estimated marginal mean values) indicate weight change data. Error bars represent the 95% CI.