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Table 2 Regression coefficients and R2 values of the full models fitted to the body composition changes

From: Impact of a ketogenic diet intervention during radiotherapy on body composition: III—final results of the KETOCOMP study for breast cancer patients

Covariate Body weight Fat mass Fat free mass Skeletal muscle mass 50 kHz phase angle
Coefficient p value Coefficient p value Coefficient p value Coefficient p value Coefficient p value
Time 0.04 ± 0.05 kg/week 0.40 0.08 ± 0.05 kg/week 0.10 − 0.05 ± 0.04 kg/week 0.22 − 0.01 ± 0.03 kg/week 0.72 0.02 ± 0.01°/week 0.012
KD: yes − 1.56 ± 0.25 kg 6.9 × 10−10 − 0.35 ± 0.15 kg 0.020 − 1.23 ± 0.27 kg 3.4 × 10−6 − 0.71 ± 0.19 kg 1.9 × 10−4 0.17 ± 0.08° 0.038
Time × KD − 0.42 ± 0.08 kg/week 4.4 × 10−7 − 0.48 ± 0.08 kg/week 1.5 × 10−9 0.09 ± 0.07 kg/week 0.19 − 0.02 ± 0.04 kg/week 0.64 − 0.04 ± 0.01°/week 0.0041
Baseline BMI − 0.49 ± 0.67 kg/10 kg/m2 0.47 0.29 ± 0.53 kg/10 kg/m2 0.58 0.13 ± 0.39 kg/10 kg/m2 0.73 0.55 ± 0.26 kg/10 kg/m2 0.033 0.28 ± 0.10°/10 kg/m2 0.0064
Time × MAP 0.12 ± 0.09 kg/week 0.19 0.15 ± 0.09 kg/week 0.086 − 0.05 ± 0.08 kg/week 0.52 − 0.02 ± 0.05 kg/week 0.60 − 0.01 ± 0.01°/week 0.54
Age − 0.22 ± 0.11 kg/10 years 0.041 0.09 ± 0.07 kg/10 years 0.19 − 0.26 ± 0.11 kg/10 years 0.025 − 0.20 ± 0.08 kg/10 years 0.012 − 0.13 ± 0.04°/10 years 3.7 × 10−4
PTV − 0.15 ± 0.23 kg/500 ccm 0.51 − 0.19 ± 0.13 kg/500 ccm 0.16 0.16 ± 0.25 kg/500 ccm 0.51 0.004 ± 0.16 kg/500 ccm 0.98 − 0.12 ± 0.07°/500 ccm 0.061
Conditional R2 0.999 0.999 0.991 0.986 0.941
Marginal R2 0.992 0.993 0.956 0.942 0.678
  1. Regression coefficient estimates are given with their standard error and associated p value. Note that the average time trends for the SD and KD groups are given by the regression coefficients corresponding to “Time” and “Time” + “Time × KD,” respectively. BMI body mass index, KD ketogenic diet, MAP Master Amino Acid Pattern supplement, PTV planning target volume