Table 3.

Differences among patients subdivided according to the presence of both night-eating behavior and bipolar spectrum disorders

	w/o (N = 72)	BSDs (N = 29)	NEB (N = 9)	NEB + BSDs (N = 11)	Χ2	p	Post hoc contrasts
	Mean ± SD / N (%)	Mean ± SD / N (%)	Mean ± SD / N (%)	Mean ± SD / N (%)
Eating and mood disorders comorbidity	7 (9.7%)	12 (41.4%)	1 (11.1%)	8 (72.7%)	-	0.000	NEB + BSDs, BSDs > w/o NEB + BSDs > NEB
Night-Eating Questionnaire (NEQ)
Mood/sleep	2.53 ± 2.09	3.41 ± 2.21	3.56 ± 2.88	5.09 ± 3.08	9.97	0.019	NEB + BSDs > w/o
Bulimic Investigatory Test, Edinburgh (BITE)
Symptom score	11.62 ± 7.88	13.86 ± 8.87	16.33 ± 8.17	19.18 ± 7.28	10.61	0.014	NEB + BSDs > w/o
Severity score	1.31 ± 1.82	1.48 ± 1.64	2.67 ± 2.65	2.27 ± 2.45	5.82	0.121	-
Symptom Checklist—90—Revised (SCL-90-R)
Somatization	0.65 ± 0.57	0.91 ± 0.53	1.18 ± 0.91	1.32 ± 0.84	11.35	0.010	-
Obsessive compulsion	0.45 ± 0.65	0.59 ± 0.58	0.6 ± 0.56	0.9 ± 0.46	12.06	0.007	NEB + BSDs > w/o
Phobic anxiety	0.13 ± 0.39	0.25 ± 0.34	0.48 ± 0.58	0.41 ± 0.41	14.06	0.003	NEB + BSDs, BSDs > w/o
Psychoticism	0.18 ± 0.34	0.39 ± 0.42	0.49 ± 0.79	0.6 ± 0.57	15.42	0.001	NEB + BSDs, BSDs > w/o
Sleep	0.59 ± 0.79	0.77 ± 0.92	1.3 ± 1.3	1.26 ± 1.13	7.41	0.060	–
Global Severity Index	0.41 ± 0.44	0.67 ± 0.48	0.77 ± 0.71	0.85 ± 0.54	14.94	0.002	NEB + BSDs, BSDs > w/o

Kruskal–Wallis’ Χ² are reported. Post hoc contrasts are based on Pairwise Fisher’s exact test and Dunn test with Benjamini–Hochberg correction. p < 0.05 are shown in bold. Abbreviations: w/o = without night-eating behavior and bipolar spectrum disorders, BSDs bipolar spectrum disorders without night-eating behaviour, NEB night-eating behavior without bipolar spectrum disorders, NEB + BSDs comorbid night-eating behavior and bipolar spectrum disorders