. Author manuscript; available in PMC: 2013 Nov 3.

Published in final edited form as: J Int Neuropsychol Soc. 2013 Feb 28;19(4):10.1017/S1355617712001634. doi: 10.1017/S1355617712001634

Table 5a. Regression analyses predicting Global and NC domain T-scores.

	Global			Motor			Processing Speed

	B	β	Δ R²	B	β	Δ R²	B	β	Δ R2
Step 1 Control variables			.357**			.100			.122
WRAT- 3 Reading	.265	.542**		.145	.262		.191	.349*
Hepatitis C status	.380	.024		1.88	.105		−1.07	−.061
Methadone treatment	−3.93	−.213⁺		−2.19	−2.121		−.802	−.045
Positive urine tox	2.61	.166		.817	.045		.12	.007
Step 2			.034*			.011			.111*
HIV status	−3.94	−.251*		−1.92	−.107		−5.96	−.340*

Note. Wide Range Achievement Test–Reading subtest, 3^rd Edition.
*p<.05.
**p<.01.
⁺p<.10.

Table 5b. Regression analyses predicting NC domain T-scores

	Working memory			Learning			Memory

	B	β	Δ R²	B	B	Δ R²	B	β	Δ R²
Step 1 Control variables			.258**			.389**			.495**
WRAT- 3 Reading	.266	.468**		.309	.498**		.381	.573**
Hepatitis C status	−.637	−.035		.010	.001		1.97	.092
Methadone treatment	.079	.004		−6.25	−.309*		−8.14	−.376**
Positive urine tox	4.11	.227⁺		5.66	.283*		4.17	.194⁺
Step 2			.030			.066*			.038⁺
HIV status	−3.22	−.179		−5.22	−.262*		−4.27	−.200⁺

Note. Wide Range Achievement Test – Reading subtest, 3^rd Edition.
*p<.05.
**p<.01.
⁺p<.10.

Table 5c. Regression analyses predicting NC domain T-scores

	Verbal Fluency			Executive Functioning
	b	β	Δ R²	B	β	Δ R²
Step 1 Control variables			.261^**			.182^*
WRAT- 3 reading	.308	.441^**		.227	.413^**
Hepatitis C status	1.52	.044		−1.41	−.042
Methadone treatment	−6.39	−.269^*		−1.05	−.080
Positive urine tox	1.57	.077		1.22	.061
Step 2			.014			.037
HIV	−2.75	−.121	0	−3.36	−.196

Note. Wide Range Achievement Test – Reading subtest, 3^rd Edition.

p<.05.

^**

p<.01.