Rasch analysis of the Chinese version of the clinically useful depression outcome scale in patients with major depressive disorder

Table 2 Person and item summary statistics

	Item (N = 18)	Person (N = 283)
Mean measure	0.00	−0.53
Infit MnSq	1.03	1.01
Infit ZSTD	−0.10	−0.70
Outfit MnSq	1.11	1.11
Outfit ZSTD	−0.50	0.00
Separation index	7.03	3.00
Reliability index	0.98	0.90
Clusters	Person correlations	Disattenuated correlations
1–2	0.62	0.89
1–3	0.79	1.00
2–3	0.75	0.96

Note: Infit MnSq, information-weighted mean-square fit statistic; Outfit MnSq, outlier-sensitive mean-square fit statistics; ZSTD, standardized mean square residual fit statistic

ISSN: 2050-7283