Table 5.

Clusters and their characterization generated by two-step cluster analysis based on the three components obtained upon Principal Component Analysis (PCA) on BD patient.

	Components generated by the PCA	Loading HAM-D-17 items	Interpretation of clusters	Patients, n (%)
Cluster 2	1	1, 2, 3, 5, 6, 7, 8, 10, 14	Psychic symptoms, depressed mood, suicide, guilty, insomnia, genitourinary symptoms	16 (30.2), of whom 5 (9.4%) TRBD
	2	11, 13, 15	Hypochondria, somatic anxiety and fatigue, headache
Cluster 1	3	9, 12, 16, 17	Agitation, gastro-intestinal, weight loss, insight	37 (69.8), of whom 10 (18.9%) TRBD

HAM-D-17, Hamilton Depression Rating Scale, 17-item version.