Table 1
Descriptive statistics between groups for gender, age, body weight and educational attainment
| N | 1. Non-binge eating (n=2578) | 2. OBE (n=353) | 3. SBE (n=20) | 4. OSBE (n=77) | Statistic | P value | Posthoc | Effect size | |
| Age, M (SD) | 3026 | 47.1 (18.8) | 40.0 (15.6) | 46.4 (15.9) | 37.4 (15.8) | F=27.11, df=3, 3023 | <0.001 | 1>2 | d=0.44 95% CI 0.33 to 0.55 |
| 1>4 | d=0.57 95% CI 0.34 to 0.79 | ||||||||
| BMI kg/m2,* M (SD) | 2749 | 26.7 (5.2) | 28.0 (5.6) | 26.0 (4.9) | 30.5 (6.7) | F=16.01, df=3, 2746 | <0.001 | 1<2 | d=−0.26 95% CI −0.38 to −0.14 |
| 1<4 | d =−0.71 95% CI −0.95 to 0.46 | ||||||||
| 2<4 | d =−0.41 95% CI −0.67 to −0.14 | ||||||||
| 3<4 | d =−0.60 95% CI −1.11 to −0.58 | ||||||||
| Gender, n (%) | 3047 | χ2=4.17, df=3 | 0.244 | n.a. | n.a. | ||||
| Male | 1260 (48.9) | 187 (53.0) | 7 (35.0) | 35 (45.5) | |||||
| Female | 1318 (51.1) | 166 (47.0) | 13 (65.0) | 42 (54.5) | |||||
| Education, n (%) | 3045 | χ2=12.119, df=6 | 0.059 | n.a. | n.a. | ||||
| No tertiary qualification | 1014 (39.4) | 130 (36.8) | 5 (25.0) | 33 (42.9) | |||||
| Trade or certificate | 954 (37.0) | 115 (32.6) | 7 (35.0) | 28 (36.4) | n.a. | ||||
| Bachelor or higher | 608 (23.6) | 108 (30.6) | 8 (40.0) | 16 (20.8) | |||||
| Distress related to binge eating, n (%) | 353 | 108 (30.6) | 7 (35) | χ2=0.172, df=1 | 0.804* | n.a. | n.a. | ||
| Overvaluation, median (IQR) | 2993 | 3.0 (1.0, 3.0, 4.0) | 4.0 (2.0, 4.0, 5.0) | 2.9 (1.0, 2.9, 4.6) | 4.0 (3.0, 4.0, 5.0) | Kruskal-Wallis H=49.537, df=3 | <0.001 | 1<2 | r=0.11 |
| 1<4 | r=0.07 | ||||||||
| 3<4 | r=0.22 |
*Distress was only compared between OBE only (353) and SBE only (20) groups, Fisher exact test used.
BMI, body mass index; d, Cohen ’s d; OBE, recurrent objective binge eating alone; n.a., not applicable; OSBE, mixed objective and subjective recurrent binge eating episodes;
; SBE, recurrent subjective binge eating alone.