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Table 4 T-test and Mann-Whitney-U test regarding sample characteristics and the BIMTM-FB-BF (S2 and S3)

From: Development and initial psychometric evaluation of the Body Image Matrix of Thinness and Muscularity – Female Bodies

  Control group (S2) Clinical group (S3) Group comparison statistics
  N = 179 N = 32  
  Mean (SD) Mean (SD) t-Value df p d
Age 22,18 (3,37) 22,22 (3,78) −0,61 209 .952 0,01
BMI 22,03 (3,62) 19,04 (4,62) 4,07 208 .000 0,79
EDE-Q
 Gesamtwert 1,60 (1,18) 3,45 (1,36) −8,09 205 .000 1,53
 restraint 1,20 (1,24) 2,97 (1,69) −5,65 37,18 .000 1,34
 Eating concern 1,60 (1,27) 2,93 (1,32) −5,41 209 .000 1,04
 Weight concern 1,93 (1,42) 3,60 (1,61) −5,97 206 .000 1,15
 Shape concern 1,50 (1,20) 4,30 (1,33) −11,97 206 .000 2,30
BIMTM-FB-BF
  Median (interquartile range) Median (interquartile range) Mann–Whitney U Z p r
 Actual 4 (1) 3 (1) 2543,50 −1,06 .145 0,07
 Felt 4 (1) 5 (1) 2206,50 −2,14 .016 0.14
 Ideal 3 (0) 2 (1) 1597,50 −4,86 .000 0,27
 Importance 3 (1) 4 (1,5) 2303,00 −1,67 .048 0,12
    t df p d
 Investment Mean (SD) Mean (SD)     
 Hours per day 1,38 (1,62) 6,15 (6,73) −4,01 31,65 .000 1,59
 Percentage of income 8,98 (9,56) 28,97 (25,93) −4,19 32,53 .000 1,50
 Years of life 1,67 (6,32) 6,84 (10,31) −2,71 33,90 .005 0,73
  1. Notes: BMI Body Mass Index, EDE-Q Eating Disorder Examination-Questionnaire; BIMTM-FB-BF body fat dimension of the Body Image Matrix of Thinness and Muscularity-Female Bodies (with the perceived actual, felt, and ideal body); BAS Body Appreciation Scale; DLS Drive for Leanness Scale; DMS Drive for Muscularity Scale. S2 student-sample (paper-pencil); S3 sample of inpatients with eating disorders