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. Author manuscript; available in PMC: 2022 Jun 1.
Published in final edited form as: Behav Res Ther. 2021 Mar 29;141:103850. doi: 10.1016/j.brat.2021.103850

Table 2.

Results of linear mixed effects models predicting change in weight and eating disorder symptoms over 24-months.


Weight (kg)
Eating Disorder Symptoms (Composite Score)
Fixed Effect Estimate SE 95% CI t P Estimate SE 95% CI t p
(Intercept) 66.03 0.64 64.77–67.30 102.38 <0.001 1.56 0.03 1.51–1.62 55.78 <0.001
Time (Months) 0.11 0.02 0.08–0.14 7.42 <0.001 0.00 0.00 −0.01–0.00 −3.16 <0.001
Condition
 Healthy Weight vs. Control 1.47 0.91 −0.32–3.26 1.61 0.11 −0.08 0.04 −0.16–−0.01 −2.12 0.03
 Project Health vs. Control 0.52 0.93 −1.30–2.34 0.56 0.58 −0.02 0.04 −0.1–0.06 −0.55 0.59
Baseline BMI 2.82 0.14 2.54–3.10 19.75 <0.001 0.02 0.01 0.01–0.03 3.13 <0.001
WS 0.45 0.34 −0.21–1.11 1.34 0.18 0.03 0.01 0.00–0.06 2.28 0.02
Time*Condition
 Healthy Weight vs. Control 0 0.02 −0.04–0.04 −0.03 0.97 0.00 0.00 0.00–0.00 −0.39 0.7
 Project Health vs. Control −0.05 0.02 −0.09–−0.01 −2.25 0.02 0.00 0.00 0.00–0.00 −0.04 0.97
Time*Baseline BMI 0 0 −0.01–0.00 −1.06 0.29 0.00 0.00 0.00–0.00 −0.47 0.64
Time*WS 0.02 0.01 0.00–0.03 1.95 0.05 0.00 0.00 0.00–0.00 −0.06 0.95
Baseline BMI*WS 0.11 0.12 −0.14–0.35 0.85 0.39 0.00 0.01 −0.01–0.01 0.48 0.63
Time*Baseline BMI*WS −0.01 0 −0.02–−0.01 −3.89 <0.001 0.00 0.00 00–0.00 −1.61 0.11

Note. WS = weight suppression; EDDI and WS scores were square-root transformed; time = 0 is baseline; other continuous variables were centered.