TABLE 3.

Fit statistics of two-factor CFA models.

		χ2 (df = 134)	CFI	SRMR	RMSEA
Non-verbal mental age	Below 24 months	260.02, p < 0.001	0.978	0.057	0.055 [0.045, 0.065]
	24 months and above	428.11, p < 0.001	0.975	0.048	0.050 [0.044, 0.055]
Language level	Few to No words	349.48, p < 0.001	0.956	0.063	0.055 [0.048, 0.063]
	Some words	345.50, p < 0.001	0.978	0.047	0.048 [0.042, 0.055]