Table 2.

Group differences in neuropsychological tests

		df	F	ηp2	p†	Tukey HSD
Episodic memory	RAVLT (Total recall 1–5)
	group	1	1.988	0.020	0.162
	MCI status	1	6.426	0.063	0.013
	RAVLT (Trial 6)
	group	1	0.969	0.010	0.327
	MCI status	1	0.633	0.007	0.428
	RAVLT (delayed recall)
	group	1	2.650	0.027	0.107
	MCI status	1	6.806	0.066	0.011
	RAVLT (recognition)
	group	1	3.338	0.034	0.071
	MCI status	1	5.778	0.057	0.018
	MIST (event-based)
	group	1	2.543	0.026	0.114
	MCI status	1	0.079	0.001	0.779
	MIST (time-based)
	group	1	0.014	< 0.001	0.907
	MCI status	1	8.123	0.078	0.005	ns
	MBT (Total Cued Recall)
	group	1	0.093	0.001	0.761
	MCI status	1	1.378	0.014	0.243
	MBT (Paired Recall Pairs)
	group	1	0.104	0.001	0.747
	MCI status	1	1.302	0.013	0.257
	MBT (Total Delayed Paired Recall)
	group	1	0.021	< 0.001	0.885
	MCI status	1	2.449	0.025	0.121
	MBT (Delayed Paired Recall Pairs)
	group	1	0.003	< 0.001	0.956
	MCI status	1	0.926	0.010	0.338
	MBT (Total Free Recall)
	group	1	0.246	0.003	0.621
	MCI status	1	2.097	0.021	0.151
	MBT (Total Delayed Free Recall)
	group	1	0.129	0.001	0.720
	MCI status	1	7.743	0.075	0.006	ns
Attention / working memory	LNS
	group	1	0.050	0.001	0.824
	MCI status	1	3.426	0.034	0.067
	TMT-A
	group	1	0.562	0.006	0.455
	MCI status	1	25.699	0.211	< 0.001	HC > iRBD-MCI; iRBD-MCI < iRBD-NC
Executive functions	PST (colors)
	group	1	0.020	< 0.001	0.888
	MCI status	1	4.213	0.042	0.043
	PST (interference)
	group	1	0.139	0.001	0.710
	MCI status	1	7.553	0.073	0.007	ns
	TMT-B
	group	1	1.189	0.012	0.278
	MCI status	1	21.29	0.182	< 0.001	HC > iRBD-MCI; iRBD-MCI < iRBD-NC
	VF (animals/clothes)
	group	1	0.524	0.005	0.471
	MCI status	1	2.872	0.029	0.093
Visuospatial functions	CDT
	group	1	0.022	< 0.001	0.881
	MCI status	1	6.237	0.061	0.014
	MoCA (cube)
	group	1	2.923	0.030	0.091
	MCI status	1	2.450	0.025	0.121
Processing speed / psychomotor speed	GPT (left hand)
	group	1	1.146	0.012	0.287
	MCI status	1	4.830	0.048	0.030
	GPT (right hand)
	group	1	0.797	0.008	0.374
	MCI status	1	3.997	0.040	0.048
	SDMT
	group	1	3.469	0.035	0.066
	MCI status	1	10.088	0.095	0.002	HC > iRBD-MCI; iRBD-MCI < iRBD-NC
	PST (Dots)
	group	1	1.460	0.015	0.230
	MCI status	1	8.625	0.082	0.004	iRBD-MCI < iRBD-NC
	PST (words)
	group	1	0.984	0.010	0.324
	MCI status	1	4.236	0.042	0.042
Language	VF (K)
	group	1	1.963	0.020	0.164
	MCI status	1	10.767	0.101	0.001	iRBD-MCI < iRBD-NC
	VF (action verb)
	group	1	0.009	< 0.001	0.926
	MCI status	1	0.527	0.005	0.470
	VF (vegetables)
	group	1	0.736	0.008	0.393
	MCI status	1	4.269	0.043	0.042

Summary of the nested ANOVAs with fixed factors group (iRBD, HC) and MCI status (NC, MCI) on demographically adjusted z-scores. df degrees of freedom, F F statistic, η_p² partial eta squared. HC healthy controls, iRBD isolated rapid eye movement sleep behavior disorder, MCI mild cognitive impairment, NC normal cognition, ns not significant post hoc test, RAVLT Rey Auditory Verbal Learning Test, MBT Memory Binding Test, MIST Memory for Intentions Screening Test, TMT Trial Making Test, LNS Letter-Number Sequencing from Wechsler Adult Intelligence Scale, Third Revision, PST Prague Stroop Test, VF Verbal fluency, CDT Clock Drawing Test, GPT Grooved Pegboard Test, MoCA Montreal Cognitive Assessment, SDMT Symbol Digit Modalities Test

†p values < 0.05 after Benjamini–Hochberg correction are in bold