Table 4.

Correlation between MCA PI and cognitive status.

PI	Cognitive		Pβ	OR	95% Confidence Interval
	Normal	Impaired			Lowest	Highest
Right MCA PI
• Normal	30	13	< 0.0001	24.231	4.943	118.78
• Abnormal	2	21
Left MCA PI
• Normal	30	8	< 0.0001	48.75	9.494	250.328
• Abnormal	2	26
Total	32 subjects	34 subjects

^βChi square test.