Table 2.

Comparisons of the three clusters on the cognitive domains not entered in the cluster analysis

Cognitive domain	Cluster	Meana	SE	Global p value	Post hoc analyses
					GI versus SI	GI versus NN	SI versus NN
Executive function (problem-solving)	GI	68.7	7.2
	SI	52.9	3.7	0.0002	0.056 NS	0.0002	0.003
	NN	36.9	3.6
Executive function (planning)	GI	2.6	0.65
	SI	2.8	0.37	0.0005	0.8 NS	0.006	0.0003
	NN	4.8	0.36
Motor coordination	GI	8.7	0.43
	SI	9.2	0.26	<0.0001	0.28 NS	0.0001	<0.0001
	NN	10.8	0.25
Selective attention/vigilance	GI	18.7	3.2
	SI	8.0	1.8	<0.0001	0.004	<0.0001	0.008
	NN	1.1	1.8

In the table, GI stands for cluster of generally impaired patients, SI for cluster of selectively impaired patients and NN for cluster of near-normal functioning patients. The comparison of the three clusters was made on executive function (problem-solving and planning), motor coordination and selective attention by means of ANOVAs on percentile. Global p values were significant for all the cognitive domains. Post hoc analyses showed that the GI and the SI did not differ much except for selective attention, whereas the NN patients had the best overall performance when compared to the two impaired clusters

^aMean scores are in percentile

Bold values indicate statistical significant