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Table 7 Adjusted influence of weight history indices on changes in slimness ideal (SIAB-S scale) during inpatient treatment. Results of the multiple linear regression analyses

From: Dimensions within 24 weight history indices and their association with inpatient treatment outcome in adults with anorexia nervosa: analysis of routine data

PredictorCor. R2B (SE), 95% CIT, pβ
Highest weight0.0140.008 (0.003), 0.002; 0.0142.52, 0.0120.091
Lowest weight0.0430.035 (0.007), 0.023; 0.0485.43, <  0.0010.234
Highest BMI0.0090.016 (0.009), − 0.003; 0.0351.68, 0.0930.061
Lowest BMI0.0410.128 (0.024), 0.081; 0.1755.33, <  0.0010.253
Highest BMI percentage0.0070.203 (0.190), −0.170; 0.5761.07, 0.2860.039
Lowest BMI percentage0.0382.765 (0.544), 1.698; 3.8325.09, <  0.0010.249
WS0.0110.007 (0.003), 0.000; 0.0132.00, 0.0460.076
WE0.035−0.041 (0.008), − 0.057; − 0.024;−5.83, <  0.001− 0.179
BMI suppression0.0090.016 (0.009), −0.003; 0.0351.68, 0.0930.064
BMI elevation0.053a−0.018 (0.033), − 0.082; 0.047−0.53, 0.594− 0.020
BMI suppression percentage0.0650.824 (0.254), 0.325; 1.3233.24, 0.0010.120
BMI elevation percentage0.038−2.784 (0.545), −3.854; − 1.713−5.11, <  0.001− 0.190
BMI oscillation0.006−0.003 (0.009), − 0.022; 0.015−0.36, 0.719− 0.013
PWC0.0140.865 (0.338), 0.201; 1.5292.56, 0.0110.111
Residual 10.0070.010 (0.010), −0.010; 0.0301.00, 0.3160.061
Residual 20.0120.007 (0.003), 0.001; 0.0132.18, 0.0300.079
Residual 30.053a0.009 (0.014), −0.019; 0.0370.63, 0.5280.027
Residual 40.0400.044 (0.008), 0.028; 0.0605.27, < 0.0010.186
h-AFW0.0060.000 (0.002), −0.003; 0.0030.24, 0.9810.001
l-AFW0.0180.014 (0.005), 0.005; 0.0243.05, 0.0020.129
Age at highest weight0.0060.003 (0.006), −0.008; 0.0140.54, 0.5900.019
Age at lowest weight0.012−0.009 (0.004), − 0.016; − 0.001−2.52, 0.025−0.081
Years since highest weight0.029−0.018 (0.004), − 0.026; − 0.010−4.29, <  0.0010.153
Years since lowest weight0.010− 0.010 (0.006), − 0.021; 0.001−1.85, 0.065−0.067
  1. Note. Regression coefficients are adjusted for length of stay and admission body mass index. Corrected R2 = 0.007 for the regression model with only length of stay and admission body mass index as predictors. aIncreased R2 due to a suppression effect of BMI elevation on admission BMI, increasing the amount of variance explained by the latter. Three best predictors based on β in boldface
  2. 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