Table 8.

Adjusted influence of weight history indices on changes in compensatory behaviors (SIAB-S scale) during inpatient treatment. Results of the multiple linear regression analyses

Predictor	Cor. R2	B (SE), 95% CI	T, p	β
Highest weight	0.035	0.002 (0.001), 0.000; 0.004	2.05, 0.041	0.074
Lowest weight	0.041	0.006 (0.002), 0.002; 0.010	3.06, 0.002	0.132
Highest BMI	0.033	0.005 (0.003), − 0.001; 0.011	1.66, 0.097	0.059
Lowest BMI	0.042	0.023 (0.007), 0.009; 0.038	3.13, 0.002	0.148
Highest BMI percentage	0.032	0.079 (0.059), − 0.036; 0.194	1.34, 0.180	0.048
Lowest BMI percentage	0.042	0.541 (0.170), 0.208; 0.874	3.19, 0.001	0.156
WS	0.034	0.002 (0.001), 0.000; 0.004	1.79, 0.074	0.067
WE	0.036	−0.006 (0.003), − 0.011; − 0.001	−2.17, 0.030	− 0.081
BMI suppression	0.033	0.005 (0.003), − 0.001; 0.011	1.66, 0.097	0.063
BMI elevation	0.042	−0.023 (0.007), − 0.038; − 0.009	−3.13, 0.002	−0.117
BMI suppression percentage	0.032	0.079 (0.059), −0.036; 0.194	1.35, 0.177	0.051
BMI elevation percentage	0.043	−0.548 (0.170), − 0.882; − 0.214	−3.22, 0.001	−0.120
BMI oscillation	0.030	0.001 (0.003), −0.004; 0.007	0.44, 0.657	0.016
PWC	0.035	0.214 (0.105), 0.009; 0.419	2.04, 0.041	0.088
Residual 1	0.031	0.003 (0.003), −0.003; 0.009	0.87, 0.387	0.052
Residual 2	0.034	0.002 (0.001), 0.000; 0.004	1.77, 0.077	0.064
Residual 3	0.032	−0.005 (0.003), − 0.011; 0.002	−1.45, 0.146	−0.063
Residual 4	0.038	0.007 (0.003), 0.001; 0.012	2.53, 0.012	0.090
h-AFW	0.031	0.000 (0.001), −0.001; 0.001	0.78, 0.434	0.028
l-AFW	0.037	0.003 (0.001), 0.001; 0.006	2.38, 0.017	0.100
Age at highest weight	0.030	0.001 (0.002), −0.003; 0.004	0.40, 0.690	0.014
Age at lowest weight	0.034	−0.002 (0.001), − 0.005; 0.000	−1.77, 0.077	−0.063
Years since highest weight	0.040	−0.004 (0.001), − 0.006; − 0.001	−2.81, 0.005	−0.100
Years since lowest weight	0.031	−0.001 (0.002), − 0.005; 0.002	−0.78, 0.438	− 0.028

Note. Regression coefficients are adjusted for length of stay and admission body mass index. Corrected R² = 0.031 for the regression model with only length of stay and admission body mass index as predictors. Three best predictors based on β in boldface

SIAB-S Structured Inventory for Anorexic and Bulimic Disorders for DSM-IV and ICD-10 – Self-Rating, Cor. R² corrected R², BMI body mass index, WS weight suppression, WE weight elevation, PWC percentage weight change, Residual 1 highest on admission weight, Residual 2 admission on highest weight, Residual 3 lowest on admission weight, Residual 4 admission on lowest weight, h-AFW highest age-factored weight, l-AFW lowest age-factored weight