Table 3.

Relationship between indexes describing the extent of brain atrophy and severity of leukoaraiosis in groups LA1 and LA2

Parameter	Mean/*median LA1	Standard deviation/*min, max LA1	Mean/*median LA2	Standard deviation/*min, max LA2	p
Huckmann number	51.40	6.62	54.69	6.95	0.0379
Bicaudate index	0.15	0.03	0.18	0.03	0.0002
Bicaudal index	0.13	0.02	0.15	0.03	0.0002
Bicaudal-frontal (ventricular) index	0.51	0.08	0.59	0.08	0.0000
Anterior horn width index	0.06	0.01	0.08	0.02	0.0000
Occipital horn width ratio	0.11	0.03	0.13	0.03	0.0097
Occipital horn-to-cranium distance index	0.23	0.02	0.22	0.03	0.0482
Schiersmann index*	4.73*	3.05/14.10*	4.31*	3.18/5.92*	0.0140

^*U Mann-Whitney test