Table 4.

Trail Making Test Part B (TM B) results from mixed linear modeling: initial, interim, and final models

		Initial		Interim		Final
		Est (SE)	P	Est (SE)	P	Est (SE)	P
Time, years		–.005 (.008)	.487	–.006 (.008)	.433	.006 (.008)	.466
HIV seropositive		–.000 (.041)	.932	–.000 (.041)	.995	.002 (.046)	.957
Age strata	40–50	.001 (.032)	.966	.020 (.033)	.548	.018 (.036)	.621
	>50	.026 (.032)	.408	.055 (.033)	.098	.050 (.036)	.165
TM B, baseline		.647 (.016)	<.001	.623 (.017)	<.001	.618 (.017)	<.001
Practice effect		–.008 (.006)	.194	–.008 (.006)	.197	–.008 (.006)	.224
Caucasian race				– .051 (.021)	<.001	– .046 (.013)	<.001
College educated				– .039 (.008)	<.001	– .035 (.009)	<.001
CES-D				.005 (.004)	.249	.005 (.004)	.254
Diabetes						.030 (.016)	.072
Hypertension						.013 (.008)	.097
Hypercholesterolemia						.001 (.010)	.911
HIV × age	40–50	–.022 (.043)	.603	–.035 (.044)	.419	–.037 (.048)	.444
	>50	–.040 (.044)	.350	–.050 (.044)	.254	–.053 (.048)	.270
HIV × time		–.017 (.010)	.094	–.017 (.011)	.122	–.013 (.011)	.238
Age × time	40–50	.001 (.008)	.926	.000 (.008)	.999	.004 (.008)	.617
	>50	.002 (.008)	.828	.003 (.008)	.754	.002 (.008)	.825
HIV × age × time	40–50	.023 (.011)	.039	.023 (.011)	.042	.023 (.011)	.038
	>50	.028 (.011)	.013	.026 (.011)	.023	.026 (.011)	.022

Note. Negative = improvement. Bold indicates statistical significance (P < .05).