. Author manuscript; available in PMC: 2013 Mar 31.

Published in final edited form as: J Autism Dev Disord. 2007 Dec 5;38(6):1104–1111. doi: 10.1007/s10803-007-0495-9

Table 5.

HLM growth trajectory model EDI communication symptoms, 22–24 months

Growth parameter	Fixed effect	Coefficient	SE	t (df)	p
HC z-score at 12 months	Intercept	0.61	0.16	3.89 (70)	<0.01
HC z-score at 12 months	EDI-C	0.13	0.06	2.09 (70)	0.04
Slope (birth to 12 months)	Intercept	0.07	0.01	6.23 (70)	<0.01
Slope (birth to 12 months)	EDI-C	0.01	0.00	1.24 (70)	0.22
Slope (12–24 months)	intercept	0.02	0.01	1.70 (70)	0.10
Slope (12–24 months)	EDI-C	−0.01	0.01	−2.75 (70)	0.01