Table 4.

Chi-Square and ANOVA Results and Planned Post-hoc Comparisons Between NES subgroups (NES-only and NES/BE) and Controls on Eating Disorder Symptomatology and Psychosocial Health Variables

	NES-only (n=45)		BE-only (n=198)		NES/BE (n=22)		Control (n=1278)		Test of Differences (df=3)	Planned Comparisons

	n	%	n	%	n	%	n	%	χ²	p	(ad)	(bc)
History of underweight (BMI<18.5)	10	22.2	29	15.2	9	40.9	163	12.9	17.29	0.001^*	0.075	0.006^*

EDE-Q3	Mean3	SD3	Mean3	SD3	Mean3	SD3	Mean3	SD3	ANOVA	p3	33

Restraint	1.81	1.69	2.50	1.52	2.93	1.79	1.20	1.28	145.69	<0.001^*	0.04	0.29
Eating	1.04	1.21	1.86	1.45	2.53	1.72	0.42	0.77	295.71	<0.001^*	0.001^*	0.09
Shape	2.69	1.91	3.44	1.49	4.17	1.28	1.62	1.37	235.88	<0.001^*	0.001^*	0.05
Weight	2.34	1.81	2.98	1.52	3.79	1.36	1.25	1.29	232.78	<0.001^*	0.001^*	0.02^*
Global	1.99	1.55	2.69	1.31	3.39	1.30	1.12	1.03	247.95	<0.001^*	0.001^*	0.04
ED behaviors (# days/28)
Binge eating	0.5	1.0	9.0	6.0	12.4	10.6	0.2	0.7	946.80	<0.001^*	0.02	0.17
Purging	0.1	0.3	1.1	4.7	4.4	11.4	0.09	0.8	65.14	<0.001^*	0.05	0.09
Laxative use	0.09	0.4	0.2	1.2	0.5	1.4	0.02	0.3	79.11	<0.001^*	0.002^*	0.37
Exercise for weight/shape	4.6	8.4	5.1	7.2	5.5	6.3	1.8	4.7	105.15	<0.001^*	0.001^*	0.51

ED diagnosis (lifetime)	n	%	n	%	n	%	n	%	χ²	p

Diagnosed^a,^b	5	11.4	17	8.8	4	18.2	32	2.6	37.57	<0.001^*	0.008	0.25
Diagnosed/Undiagnosed^a,^c	12	26.7	73	36.9	14	63.6	153	12.0	118.51	<0.001^*	0.01	0.03
AN^a	5	11.1	10	5.1	4	18.2	19	1.5	47.25	<0.001^*	0.002^*	0.04

HRQOL (# days/30)	Mean	SD	Mean	SD	Mean	SD	Mean	SD	ANOVA	p

Total unhealthy days (Physical or mental)	13.5	11.0	12.2	10.0	15.0	9.7	7.4	8.6	75.79	<0.001^*	0.001^*	0.17
Activity limitation due to poor health	4.5	6.1	3.7	5.6	8.7	9.2	2.2	4.5	59.30	<0.001^*	0.004^*	0.005^*

Psychiatric diagnoses	n	%	n	%	n	%	n	%	χ²	p

Any diagnosis^a	20	45.5	53	27.2	6	27.3	221	17.6	29.14	<0.001^*	0.001^*	0.99
Depression^a	12	27.3	34	17.6	5	22.7	110	8.7	30.87	<0.001^*	0.001^*	0.57
ADHD^a	9	20.0	9	4.7	3	13.6	59	4.7	23.54	<0.001^*	0.001^*	0.12
ADHD medication (last yr)	6	13.3	9	4.5	3	13.6	62	4.8	9.74	0.03	0.02	0.11
Self-injury	10	22.2	24	12.4	4	18.2	113	8.9	12.00	0.007^*	0.008^*	0.50
Binge drink	30	66.7	101	51.8	17	77.3	667	52.6	8.73	0.04	0.07	0.03

In planned comparisons, a=NES-only, b=BE-only, c=NES/BE, and d=Control

Abbreviations: EDE-Q, eating disorder examination-questionnaire; AN, anorexia nervosa; ED, eating disorder. HRQOL, health-related quality of life. ADHD, Attention-deficit hyperactivity disorder

Lifetime diagnosis based on self-report.

Positive responses to the question, “Have you been diagnosed with an eating disorder?”

Positive responses to the above question or positive responses to the question, “If you have not been diagnosed with an eating disorder, do you feel you have had an eating disorder?”

Statistically significant after applying Hochberg modified Bonferroni to guard against Type I Error.