Table 1 Studies assessing EDE-Q test-retest reliability

The Reliability of the Eating Disorder Examination--Self-Report Questionnaire Version

N = 139 female undergraduates at a large midwestern university

14 days

Phi coefficient (items measuring key behavioral features of eating disorders)

Reliability of EDE-Q items measuring occurrence and frequency of behavioral features:

18.5 years old on average (SD = 2.0)

-Occurrence (Phi coefficient) = Binge eating .62 Self-induced vomiting .66

86% white, 8.4% African American, 2.0% Hispanic, 1.0% Native American, 2% other

Pearson r (test re-test reliability of items measuring frequency of behavioral features and EDE-Q subscales)

Laxative misuse .70 Diuretic misuse .57

97% single, 2% married, 1% separated or divorced Avg. BMI = 22.5 (SD = 4.0)

-Frequency (Pearson r) = Binge eating .68 Self-induced vomiting .92

Recruited through offering extra credit points toward research assignment in Introductory Psychology course; one additional extra credit point offered to participants willing to return for a second session (68% did)

Laxative misuse .65 Diuretic misuse = .54 -Cronbach’s alpha =

Cronbach’s alpha (internal consistency of subscales)

Restraint T1 .84/T2 .85 Shape Concern T1 .93/T2 .92 Weight concern T1 .89/T2 .89

Eating concern T1 .78/T2 .81- test-retest reliability of EDE-Q subscales Pearson r: Restraint .81 Shape concern .94 Weight concern .92 Eating concern .87

Temporal Stability of the Eating Disorder Examination Questionnaire

802 women aged 18-45. Recruited in two phases: (1) selected at random from the national (Australia) electoral roll and sent an EDE-Q, self-report weight and height questionnaire and demographic form (2) Of those participants, all who completed the questionnaires, provided a phone number and indicated a willingness to be contacted by telephone at a later date were selected to participate in the second administration of the EDE-Q

315 days

Kendall’s tau-b (frequency)

-Range of Cronbach’s alpha coefficients for individual subscales:

Phi coefficient (occurrence)

-Eating Concern = .73 to Shape Concern = .87

Cronbach’s alpha (internal consistency)

Global score = .93

-Eating disorder behaviors occurrence/frequency test re-test correlations (Phi Coefficient and Kendall’s’ tau-b):

-Objective bulimic episodes: Occurrence (phi) .44 and Frequency (Kt-b) .44

-Subjective bulimic episodes = Occurrence .24 and Frequency .28-Exercising for shape or weight = Occurrence .31 and Frequency .31

Reliability of the Eating Disorder Examination-Questionnaire in patients with binge eating disorder

N = 86 men and womenAvg. age = 23–59 (mean = 44.9, SD = 8.9)

Mean = 4.8 days Range = 1–14 days

Spearman’s rho (test retest reliability)

Overeating behaviors

-OBEs = .84

-SBEs = .51

79.1% female, 20.9% male

-OOEs = .39

82.6% Caucasian

Subscales

-Restraint = .77

-Shape concern = .66

66% married

-Weight concern = 71

51.8% college graduates Mean BMI = 36.9

-Eating concern = .72

EDE-Q total score = .76

Subscales at different time lag intervals

Participants recruited through print advertisements for treatment studies of BE at a university med school; pre-screening criteria included age 18–60, BMI > 27, likely BED diagnosis; exclusionary criteria included concurrent eating/weight/psychiatric treatment, medical conditions that influence weight

Overeating Behaviors:-OBEs =

.82 (0–1 days), .86 (2–14 days), .82 (7–14 days)

-SBEs =

.58 (0–1), .41 (2–14), .37 (7–14)

-OOEs =

.51 (0–1), .34 (2–14), .19 (7–14)

-Restraint =

.79 (0–1), .86 (2–14), .82 (7–14)

-Shape concern =

.79 (0–1), .75 (2–14), .66 (7–14)-Weight concern =

.76 (0–1), .70 (2–14), .71 (7–14)

-Eating concern =

.69 (0–1), .72 (2–14), .77 (7–14)

EDE-Q total score =

.79 (0–1), .74 (2–14), .72 (7–14)

The Spanish language version of the Eating Disorder Examination Questionnaire: Comparison with the Spanish language version of the eating disorder examination and test-retest reliability

N = 77 Latina women (monolingual Spanish-speakers) recruited through print advertisements

Mean = 8.9 days (SD = 2.5, range = 5–14 days)

Spearman’s rho (test re-test reliability)

Subscales

-Restraint: Spearman rho = .59

-Eating concern: .81

Avg. age 41.5 (sd = 13.6 -Mean BMI = 29.1 (sd = 5.9; range 19.8-43.0)

-Weight concern: .71

-Shape concern: .81

-Global score: .85

Psychometric Properties of the Eating Disorder instruments in Black and White young women: Internal consistency, temporal stability, and validity

N = 97 Black and N = 179 White female undergraduates.

Mean = 5.24 months

Cronbach’s alpha

Cronbach’s alpha range: .81 (Restraint) to .89 (Shape Concern) for Black women and .84 (Restraint and Weight Concern) to .91 (Shape Concern) for White women

Pearson r (test retest reliability)

Oversampled for Black women. Recruited through introductory psychology classes and campus wide e-mail, flyers. Mean age black women = 19.0 (sd = 1.59); White women 18.6 (sd = 1.06)

Phi coefficient (occurrence)

Test-retest reliability

Black women:

Restraint = .57; Eating Concern = .79; Weight Concern = .81; Shape Concern = .82;

N = 70 Black women and N = 156 White women with data at Time 2

OBE = .57; SBE = .19; Exercise = .31

Test-retest reliability

White women:

Restraint = .71; Eating Concern = .81; Weight Concern = .81; Shape Concern = .80 OBE = .53; SBE = .40; Exercise = .39

Validity and Reliability of a Fijian Translation and Adaptation of the Eating Disorder Examination Questionnaire

N = 523 school-going adolescent Fijian females

Approximately 1 week

Intraclass correlation coefficient (subscales)

-ICC (English) = .79 (global); .75 (restraint) .55; (eating concern), .70 (shape concern), .78 (weight concern) -ICC (Fijian) .70 (global), .60 (restraint), .50 (eatingconcern), .63 (shape concern), .56 (weight concern

N = 81 subjects who re-took the EDE-Q within ~1 wk; 21 retook EDE-Q in English, 60 in Fijian

Ages 15–20 from 12 secondary schools registered in one administrative sector in the Fiji Ministry of Education as of October 2006

-Kappa (English) .81 (any purging), .39 (vomiting), .48

(laxative misuse), .51 (herbal purgative use), .53 (driven exercise), .68 (fasting), .55 (binge eating)

-Kappa (Fijian) = .62 (any purging), .66 (vomiting), .13

(laxative misuse), .63 (herbal purgative use), .46 (driven exercise), .61 (fasting), .60 (binge eating)

Kappa (behaviors)

Norms for the Eating Disorder Examination Questionnaire among female university students in Norway

N = 671 women

-Mean = 8.3 days -SD = 2.8 days

Spearman’s rho (test retest reliability)

-Spearman rho = .93 (global EDE-Q score)

Ages 18–66 (mean = 24.8, SD = 6.9)

.90 (restraint)

.82 (eating concern)

.91 (shape concern)

.86 (weight concern)

.83 OBEs

.73 (self-induced vomiting)

.81 (laxative misuse)

.71 (excessive exercise)

Self-reported avg. BMI was 22.3, SD =3.4 (range = 11.9-45.0)

Cronbach’s alpha (internal consistency)

61% unmarried and 29% cohabiting or unmarried

10.1% of students had immigrated to Norway and 37% originally from country outside of Europe

Recruited from five different departments in two university settings in Norway; given lottery ticket as compensation

-Cronbach’s alpha = .94 (global)

.75 (restraint)

.78 (eating concern)

.90 (shape concern)

.81 (weight concern)

The Turkish version of the Eating Disorder Examination Questionnaire: Reliability and validity in adolescents

N = 925 primary and high school students 626 girls and 299 boys

-15 days or less

(test retest reliability)

-Pearson r = .91 (global score)

Cronbach’s alpha (internal consistency)

Mean age = 15.52 years (SD = 1.88, range = 12-18)

.43 (binge eating)

(mean not specified)

.89 (weight concern

Test retest reliability carried out on 52 girls and 26 boys

.79 (restraint)

.83 (eating concern)

.89 (shape concern)

Reliability of the Greek version of the eating disorder examination questionnaire (EDE-Q) in a sample of adolescent students

N = 257 secondary school students 133 girls, 124 boys

Mean = 34 days

-Intraclass and Pearson r

-Cronbach’s alpha range .71 - .91

(test-retest reliability for subscales and global score)

-Intraclass correlation coefficients = range .55 - .70

Avg age = 16.1 (sd = 1.4)

-Pearson r range .58 - .73

-Kendall’s tau-b (behavioral features)

-Kendall’s tau-b range .22 - .57