Table 4.

Properties of the seven proposed subscales based on the non‐parametric item response theory (NIRT) analyses

		CDa	PDb	Total group
Subscale	Items	Mean (SD)	Mean (SD)	Mean (SD)	H (range Hi values)	α c
Dep+	Dep: 14, 15, 26, 29, 30, 31, 32, 54, 71, 79; Anx: 2, 33; Int: 34, 41; Obs: 28, 55; Psy: 77	2.0 (0.83)	2.5 (0.81)	2.4 (0.84)	0.45 (0.39–0.54)	0.93
Ag	Phob: 13, 25, 47, 50, 70, 82; Int: 73; Anx: 23, 39, 57, 72; Som: 48	1.1 (0.83)	1.5 (0.94)	1.4 (0.93)	0.47 (0.40–0.52)	0.90
Phy	Som: 4, 27, 42, 52, 56, 58	1.6 (0.95)	1.8 (0.99)	1.8 (0.99)	0.45 (0.39–0.51)	0.81
Obs‐	Obs: 3, 38, 45, 46, 65; Anx: 86	1.1 (0.73)	1.5 (0.84)	1.5 (0.84)	0.38 (0.33–0.45)	0.74
Hos	Hos: 11, 24, 63, 67, 74, 81	0.5 (0.50)	0.8 (0.77)	1.3 (0.86)	0.47 (0.40–0.52)	0.80
Dis	Para: 18, 43, 83; Int: 36, 37, 61, 69	1.0 (0.74)	1.7 (0.94)	1.6 (0.95)	0.48 (0.40–0.52)	0.85
Psy–d	Psy: 7, 35, 62, 85, 90; Extra: 89	0.6 (0.53)	1.0 (0.72)	0.9 (0.70)	0.40 (0.36–0.42)	0.72

^aClinical disorder group.

^bPersonality disorder group.

^cCronbach's alpha.

^dFor the CD group, two smaller Psy– clusters were found, the first consisting of items 7, 35 and 62 (H = 0.43) and the second of 85, 89 and 90 (H = 0.45).