Influence of Different Cut-Off Values on the Diagnosis of Mild Cognitive Impairment in Parkinson's Disease

Table 3

Percentage (including 95% confidence interval, 95% CI) of Parkinson patients with minimal cognitive impairment (PD-MCI) and without (PD-noMCI) in regard to different PD-MCI subtypes.

		Single				Multiple
	PD-MCI total	Amnestic		Nonamnestic		Amnestic		Nonamnestic
		%	95% CI	%	95% CI	%	95% CI	%
One test per domain below cut-off
𝑧<−1	93	9.7	4.8–18.0	16.1	9.6–25.5	68.8	58.3–77.8	5.4	2.0–12.7
𝑧<−1.5	73	21.9	13.4–33.4	21.9	13.4–33.4	48.0	36.3–59.8	8.2	3.4–17.7
𝑧<−2	34	41.2	25.1–55.2	41.2	25.1–55.2	11.8	1.0–21.1	5.8	3.8–28.4
Two tests per domain below cut-off
𝑧<−1	57	36.8	24.8–50.1	12.3	5.5–24.3	43.9	31.0–57.6	7.0	2.3–17.8
𝑧<−1.5	31	54.8	36.3–72.2	19.4	8.1–38.1	22.6	10.3–41.5	3.2	0.2–18.5.
𝑧<−2	10	80.0	44.2–96.5	20.0	3.5–38.1	0	0.0–34.5	0	0.0–34.5