Developing a short-form version of the HIV Disability Questionnaire (SF-HDQ) for use in clinical practice: a Rasch analysis

Table 4 Mental-Emotional Domain (5 items) - Overview of final SF-HDQ item level and domain model fit statistics

Item #	Final SF-HDQ items	Item level statistics
Mental-emotional domain		Location	SE	Residual	ChiSq χ ²	p value
24	Feel anxious	0.128	0.044	0.385	11.297	0.256
25	Feel sad, down, or depressed	0.092	0.044	− 1.798	20.480	0.015
26	Afraid for my future	− 0.232	0.041	0.088	5.906	0.749
27	Lack confidence around others	0.216	0.042	0.610	9.372	0.404
32	Feel lonely	− 0.203	0.04	1.256	6.858	0.652
Final model: mental-emotional domain—5 items (raw score range: 0–20)
Mean		-0.694
Standard deviation		1.335
Sample size		903
Chi-square statistic (df) p value		53.9124 (df: 45) p = 0.170297^a
Cronbach’s alpha		0.84935
Person Separation Index		0.79154
Unidimensionality t-test (% significant)		1.14%
Differential Item Functioning (DIF)		None

ISSN: 1477-7525