. Author manuscript; available in PMC: 2013 Mar 1.

Published in final edited form as: Neuropsychology. 2012 Jan 16;26(2):156–164. doi: 10.1037/a0026799

Table 3.

FMR1 repeat length as a predictor of executive function measures: categorical (non-carrier vs. premutation carrier) and linear models (repeat length as a continuous variable). Models adjusted for age, education, and cohort.

Measure	Categorical Models				Linear Models
	Least Squares Means		Repeat group partial R²	p-value	Repeat length standardized β estimates	Repeat length partial R²	p-value
	NC	PM	Repeat group partial R²	p-value	Repeat length standardized β estimates	Repeat length partial R²	p-value
COWAT	41.56	39.45	0.01	0.16	−0.05	<0.01	0.41
Stroop	63.52	59.66	0.02	0.01	−0.06	0.02	0.02
Backward digit span	7.32	7.06	<0.01	0.41	−0.10	0.01	0.08
Letter-number sequencing	11.68	11.34	<0.01	0.31	−0.06	<0.01	0.27
Hayling	1.33	2.43	0.12	<0.01	0.36	0.12	<0.01
WCST	1.94	2.01	<0.01	0.54	0.07	0.01	0.38
BDS	20.57	18.84	0.07	0.03	−0.16	0.03	0.18

NC=non-carrier; PM=premutation carrier; COWAT=Controlled Oral Word Association Test; WCST=Wisconsin Card Sorting Test; BDS=Behavioral Dyscontrol Scale