Table 6.

Measurement invariance model fit statistics for the Prodromal Questionnaire positive subscale and ethnicity.

Model	X2 (df)	CFI	RMSEA (90 % CI)	Change in CFI	Change in RMSEA
Endorsed Items
Configural	4888.74 (1890)	0.979	0.030 (0.029, 0.031)	NA	NA
Metric	5114.68 (1934)	0.978	0.030 (0.029, 0.031)	−0.001	0.000
Scalar	5159.45 (1978)	0.978	0.030 (0.029, 0.031)	0.000	0.000
Strict	5007.02 (1933)	0.979	0.030 (0.029, 0.031)	0.001	0.000
Distressing Items
Configural	4236.64 (1890)	0.981	0.026 (0.025, 0.027)	NA	NA
Metric	8522.85 (1934)	0.948	0.044 (0.043, 0.045)	−0.033	0.018
Partial Metrica	4310.07 (1904)	0.981	0.027 (0.026, 0.028)	0.000	0.001
Partial Scalar	5254.97 (1948)	0.974	0.031 (0.030, 0.032)	−0.007	0.004
Partial Strict	4247.62 (1903)	0.981	0.026 (0.025, 0.027)	0.007	−0.005

Note: Abbreviations: X² = chi square, df = degrees of freedom, CFI = comparative fit index, RMSEA = root mean squared error of approximation, CI = confidence interval; goodness of fit thresholds: CFI > 0.95, RMSEA ≤0.06, RMSEA upper CI bound ≤0.08, change in CFI decrease ≤0.010, change in RMSEA increase ≤0.015. Change in CFI and RMSEA derived by taking the difference with the previous less restricted model.

^aCompared to configural model.