Visual processing speed in hemianopia patients secondary to acquired brain injury: a new assessment methodology

Table 2 Visual processing speed for complexity groups of everyday stimuli

CG of everyday stimuli		Group	Mean VPS	CI 95% Mean		p-value	CG comparison	Group	VPS change (%)
CG of everyday stimuli		Group	(s)	Lower	Upper	p-value	CG comparison	Group	Mean	p-value
CG1	Geometric figures	ABI	100.1	83.2	116.8	< 0.0001*	CG2 vs CG1	ABI	(−)23.1	< 0.0001*
		ABI	100.1	83.2	116.8		CG2 vs CG1	Control	(−)12.2	< 0.0001
		Control	51.6	46.7	56.5		CG3 vs CG1	ABI	18.4	0.0005*
		Control	51.6	46.7	56.5			Control	29.0	< 0.0001
CG2	Letters	ABI	72.2	63.0	81.4	< 0.0001*		Control	29.0	< 0.0001
		ABI	72.2	63.0	81.4		CG4 vs CG1	ABI	(−)17.4	< 0.0001*
		Control	45.1	40.8	49.3		CG4 vs CG1	Control	(−)5.3	0.0259
CG3	Animals drawings	ABI	115.4	96.0	135.0	< 0.0001*	CG3 vs CG2	ABI	59.3	< 0.0001*
		ABI	115.4	96.0	135.0			Control	47.1	< 0.0001
		Control	67.4	58.6	76.2			Control	47.1	< 0.0001
		Control	67.4	58.6	76.2		CG4 vs CG2	ABI	8.8	0.0028*
CG4	Mixed drawings	ABI	78.2	68.2	88.3	< 0.0001^#	CG4 vs CG2	Control	8.1	0.0030
		Control	49.1	43.5	54.8		CG4 vs CG3	ABI	(−)29.0	< 0.0001*
		Control	49.1	43.5	54.8		CG4 vs CG3	Control	(−)25.6	< 0.0001

Table 2 summarizes both study groups mean VPS values (s), its CI 95% and the p-values obtained from comparing both samples for each of the 4 CGs of everyday stimuli. On the other hand, it includes for each study group, the mean VPS % of change values and the p-values obtained from each one of the 6 possible two-by-two comparisons among the 4 types of stimuli
CG complexity group, s seconds, VPS visual processing speed, CI confidence interval, ABI acquired brain injury
* Wilcoxon signed-rank test; ^# Paired sample Student’s t-Test

ISSN: 1743-0003