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. Author manuscript; available in PMC: 2018 Sep 1.
Published in final edited form as: Int J Eat Disord. 2017 Jun 17;50(9):1109–1113. doi: 10.1002/eat.22739

Table 1. Descriptive statistics and comparisons of outcome measures across DSM-5 severity groups.

Sample Mild1 Moderate2 Severe3 Extreme4 Wald χ2 p Pairwise comparisons
M SD n M SD n M SD n M SD n
AN Age 24.10 7.40 68 27.31 9.18 26 26.63 13.16 8 32.75 6.29 4 6.52 .089
BMI 17.72 .47 70 16.57 .28 26 15.71 .24 9 14.44 .29 4 – –
EDE-G 3.19 1.21 70 2.60 1.37 26 1.78 1.03 9 2.78 1.04 4 13.31 .004 1>2,3
STAI-T 56.15 11.56 67 55.13 13.68 23 54.50 13.72 8 58.50 8.19 4 .43 .935
BDI 23.54 14.77 67 22.96 14.69 23 22.25 12.56 8 28.75 9.91 4 .64 .866
EDQOL 1.65 .70 44 1.34 .38 11 1.49 .55 6 1.72 .66 4 2.50 .476
BN Age 29.81 11.91 16 30.61 11.36 23 23.93 5.85 14 28.63 11.87 16 3.87 .276
BMI 24.38 5.08 16 23.98 5.70 22 23.83 5.79 15 22.26 3.99 20 1.97 .580
Baseline EDE-G 3.24 .85 17 2.84 1.14 23 3.46 .75 16 3.46 1.15 20 5.49 .139
BDI 16.53 7.00 17 14.77 10.77 22 14.88 9.27 16 21.00 13.72 19 4.55 .208
SF-36 PHC 57.07 7.62 17 54.87 7.10 22 53.58 7.83 16 52.54 10.12 19 6.28 .099
EOT EDE-Ga 1.64 .926 9 1.59 .80 18 1.73 1.37 9 1.96 1.20 10 .30 .959
EOT OBE frequencya .78 1.09 9 5.89 8.94 18 8.22 12.60 9 17.40 24.90 10 9.91 .019 4,3,2 > 1
EOT purging frequencya .11 .33 9 6.78 9.63 18 11.22 14.51 9 26.10 31.76 10 31.23 <.001 4>2>1; 3 > 1
n % n % n % n %
EOT abstinenceb 8 88.9 6 33.3 1 11.1 3 30.0 8.49 .037 1 > 2,3,4
BED Age 46.08 11.23 79 47.71 10.10 85 45.32 9.65 44 51.57 5.69 8 3.58 .278
BMI 38.54 7.22 79 39.09 8.33 85 38.99 7.27 44 41.04 12.13 8 .82 .845
Baseline EDE-G 2.50 .93 79 2.55 .78 85 2.78 .86 44 2.97 .82 8 4.77 .190
IDS 23.58 10.92 77 24.95 10.85 82 27.43 13.42 44 21.00 11.92 8 4.14 .246
SF-36 PHC 44.78 11.39 73 42.98 12.41 74 43.85 9.87 40 36.75 13.37 7 3.52 .318
IWQOL 86.26 27.68 65 91.00 20.70 72 97.74 23.07 38 87.43 20.32 7 5.80 .122
EOT EDE-Ga 1.87 1.01 56 1.97 .68 61 2.21 .89 32 1.16 .54 6 13.38 .004 1,2,3 >4
EOT OBE frequencya 4.88 6.12 56 7.15 11.00 61 12.19 16.11 32 12.17 19.29 6 1.80 .615
n % n % n % n %
EOT abstinenceb 21 37.5 22 36.1 9 28.1 4 66.7 3.05 .384

Note. AN = anorexia nervosa; BN = bulimia nervosa; BED = binge-eating disorder; BMI = body mass index; EDE-G = Eating Disorder Examination-Global score; STAI-T = State Trait Anxiety Inventory-Trait subscale; BDI = Beck Depression Inventory; EDQOL = Eating Disorder Quality of Life Total Score; SF-36 PHC = 36-Item Short Form Survey Physical Health Component; EOT = end of treatment assessment; OBE = objective binge episode; IDS = Inventory of Depressive Symptomatology; IWQOL = Impact of Weight on Quality of Life-Lite Questionnaire. Post-hoc pairwise comparisons indicate significant differences at p < .05.

a

End of treatment analyses co-varied for baseline levels of outcome variables; behaviors represent frequency over the last 28 days. Purging frequency was calculated as the sum of self-induced vomiting, laxative, and diuretic use episodes.

b

EOT abstinence was defined as no OBEs or purging episodes over the last 28 days in the BN sample, and no OBEs over the last 28 days in the BED sample. Abstinence percentages represent the proportion of the sample within each severity group.