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Table 4 Decomposition of the statistically significant interaction effects from the repeated measures analyses of variance. Results of the t-tests for dependent samples

From: Impact of comorbid borderline personality disorder on inpatient treatment for bulimia nervosa: analysis of routine data

Variable

M (SD)

admission − discharge

t(df), p

Cohen’s d

EDI2: perfectionism

BN

0.29 (0.57)

14.24 (774), <  0.001

0.42

BN + BPD

0.13 (0.58)

2.28 (100), 0.024

0.17

EDI2: asceticism

BN

0.37 (0.52)

19.69 (766), <  0.001

0.73

BN + BPD

0.25 (0.45)

5.61 (99), <  0.001

0.45

BDI-II

BN

14.70 (11.30)

31.53 (586), <  0.001

1.28

BN + BPD

11.66 (10.59)

10.27 (86), <  0.001

0.98

Body mass index

BN

−0.40 (1.28)

−7.82 (622), <  0.001

−0.09

BN + BPD

− 0.78 (1.37)

−5.71 (99), <  0.001

−0.18

  1. Note. After Bonferroni-correction for multiple testing, the significance level for these tests is at 0.05/8 = 0.006. M Mean, SD standard deviation, EDI-2 Eating Disorder Inventory 2, BDI-II Beck Depression Inventory II, BN bulimia nervosa, BN + BPD bulimia nervosa with comorbid Borderline Personality Disorder