. Author manuscript; available in PMC: 2007 Jun 4.

Published in final edited form as: Am J Speech Lang Pathol. 2007 May;16(2):169–178. doi: 10.1044/1058-0360(2007/021)

Table 8.

Best-fitting liability threshold model results for the recovered and persistent groups of children (1 threshold model - unaffected /affected).

Models	Par	-2LL	df	LRT(df)	AIC
RECOVERED GROUP

Saturated model	15	6502.854	12742
AE equated across boys and girls	4 (+ 2 constraints)	6520.398	12755	17.54 (13)	-8.46
PERSISTENT GROUP

Saturated model	15	1410.555	11927
AE equated across boys and girls	4 (+ 2 constraints)	1426.514	11940	15.96 (13)	-10.04

Note: Models tested were: ACE full sex limitation model allowing both qualitative and quantitative sex difference, ACE common effect sub-model allowing only quantitative sex differences. ACE allowing no qualitative or quantitative sex differences, AE allowing no qualitative or quantitative sex differences and dropping the shared environment parameter. Non-significant p-values indicate that the model tested is a good fit for the data.