Table 4.

Model Fit Results From CFA on the 5 Negative Items of the Structured Interview for Prodromal Symptoms (SIPS)

Model	Number of Distinct Parameters to be Estimated	AIC	BCC	X2 Value (df)	TLI	CFI	RMSEA
1 Factor	11	54.571	56.634	32.571 (9)*	0.716	0.744	0.193
2 Factor	16	43.447	46.447	11.447 (4)	0.798	0.919	0.163
Hierarchical	15	43.666	46.469	13.66 (5)	0.812	0.906	0.157

Note: CFA, confirmatory factor analysis; AIC, Akaike information criterion; BCC, Browne–Cudeck criterion; CFI, confirmatory fit index; RMSEA, root mean square error of approximation; TLI, Tucker Lewis index.

*P < .01.