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. 2012 Sep 23;27(8):592–599. doi: 10.1177/1533317512459792

Table 4.

The RRIV Results in Patients With AD and Control Group

RRIV results (%)	AD		Control group
RRIV results (%)	Median (range)	Mean ± SD	Median (range)	Mean	P value
R1	7.58 (3.40−18.40)	7.78 ± 2.80	14.10 (4.83−31.0)	15.15 ± 6.57	.058
R2	7.93 (2.97−14.90)	7.81 ± 2.70^a	13.30 (4.13−26.0)	14.07 ± 5.91	.039
R3	7.59 (2.85−16.20)	7.60 ± 2.81^a	14.60 (4.32−25.80)	13.97 ± 5.12	.037
Rmean	8.05 (3.65−16.0)	7.73 ± 2.35^a	14.60 (4,96−25.10)	14.39 ± 5.45	.03
R-DB	17.20 (3.62−32.70)	17.87 ± 6.74^a	27.20 (8.40−61.40)	31.57 ± 14.49	.018

Abbreviations: RRIV, R-R interval variation; AD, Alzheimer’s disease.

^a P < .05 (Wilcoxon test).