Table 2. McFadden’s pseudo R² and IRT parameters for items displaying DIF.

Item bank	Item with DIF	DIF type	McFadden’s pseudo R2	Slope; and threshold parameters	Included in CATd
Anxiety	EDANX03: It scared me when I felt nervous	Uniform	R212 = 0.021 R223 = 0.011	NL: 2.62; 0.15, 0.97, 2.02	1%
				US: 3.74; 0.59, 1.18, 1.95
	EDANX30: I felt worrieda	Non-uniform	R212 = 0.010 R223 = 0.033	NL: 2.16; -1.12, -0.10, 1.29, 2.64 US: 3.14; -0.57, 0.24, 1.22, 2.12	3%
Depression	EDDEP04: I felt worthlessb	Uniform	R212 = 0.024 R223 = 0.013	NL: 2.93; -0.17, 0.58, 1.56, 2.61 US: 4.37; 0.29, 0.88, 1.61, 2.36	8%
	EDDEP36: I felt unhappyc	Uniform	R212 = 0.037 R223 = 0.001	NL: 4.21; -0.14, 0.61, 1.33, 2.20 US: 3.44; -0.64, 0.23, 1.20, 2.17	100%

The bold population had lower thresholds compared to the other population, indicating that this population endorses higher item response categories at the same level of the domain (anxiety, depression)

^a present in the anxiety 7a short form

^b present in the depression 4a, 6a, 8a and 8b short form

^c present in the depression 6a, 8a and 8b short form

^d Based on 4047 CAT-based assessments for anxiety and 4293 CAT-based assessments for depression