CORE-OM as a routine outcome measure for adolescents with emotional disorders: factor structure and psychometric properties

Table 5 Steps in showing partial scalar invariance

Step	Largest modification index	Chi-square (df)	RMSEA (90% CI)	CFI	DIFFTEST (Configural vs. partial scalar)
A	Item 14^a Threshold 1	1713.8 (1149)***	0.043 (0.039, 0,047)	0.970	∆χ²(115) = 174.1***
B	Item 29^b Loading	1702.2 (1145)***	0.043 (0.038, 0,047)	0.970	∆χ²(111) = 161.5***
C	Item 4^c Threshold 3	1679.3 (1141)***	0.042 (0.038, 0,046)	0.971	∆χ²(107) = 140.7* p = .016
D	Item 31^d Loading	1665.9 (1137)***	0.042 (0.037, 0,046)	0.972	∆χ²(103) = 127.3, p = .053 n.s.
E	Item 19^e Threshold 4	1662.0 (1133)***	0.042 (0.038, 0,046)	0.972	∆χ²(99) = 117.8, p = .10 n.s.

* p < .05, *** p < .0005. n.s. non-significant. ^a I have felt like crying; ^b I have been irritable when with other people; ^c I have felt O.K. about myself; ^d I have felt overwhelmed by my problems; ^e I have felt warmth and affection for someone

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