Table 4.

The prevalence of the severity levels of cognitive impairment in the early and late assessment groups.

	Early assessment group (n = 86)	Late assessment group (n = 48)	p value
Not impaired, n (%)	33 (38.4)	24 (50.0)	0.140
Mild (One abnormal test), n (%)	37 (43.0)	16 (33.3)	0.098
Moderate (Two abnormal tests), n (%)	15 (17.4)	8 (16.7)	0.166
Moderately severe (Three abnormal tests), n (%)	1 (1.2)	0 (0.0)	n/a
Severe (Four or five abnormal tests), n (%)	0 (0.0)	0 (0.0)	n/a

n/a, not applicable.