Using Rasch measurement theory to assess the psychometric properties of a depressive symptoms scale in Norwegian adolescents

Table 2 Item fit statistics for the scale measuring depressive symptoms used in Ungdata

Item	Label	Location	Fit residual	X²	Probability
1	felt that everything is a struggle	−0.382	−7.856	413.027	< 0.001
2	had sleep problems	0.014	30.129	701.689	< 0.001
3	felt unhappy, sad or depressed	0.303	−11.566	524.419	< 0.001
4	felt hopelessness about the future	0.340	−7.256	292.364	< 0.001
5	felt stiff or tense	0.362	5.210	57.630	< 0.001
6	worried too much about things	−0.636	−11.282	421.640	< 0.001

ISSN: 1477-7525