Recurrence Quantification Analysis of F-Waves and the Evaluation of Neuropathies

Table 1

Electrodiagnostic variables in the three groups of patients as well as %REC/%LAM values and statistical differences between groups.

(a)

	Group A	Group B	Group C
Number	29	7	25
Distal motor latency	4.8 ± 0.86 ms	5.0 ± 0.6	4.7 ± 1.0
Conduction velocity	37 ± 5.4 m/sec	40.4 ± 2.6	37.5 ± 4.4
CMAP amplitude	3.9 ± 3.9 mV	8.4 ± 5.1	6.0 ± 3.9
CMAP duration	9.0 ± 4.8 ms	6.5 ± 2.7	8.2 ± 3.2
Mean F-latency	69.4 ± 6.0 ms	64.2 ± 7.3	67.1 ± 9.2
Mean/predicted F-latency	1.3 ± 0.3	1.2 ± 0.1	1.2 ± 0.1
F-wave chronodispersion	8.7 ± 3.6 ms	8.0 ± 3.7	9.5 ± 3.8
F-wave persistence (%)	75.8 ± 24.6	99.0 ± 2.6	90.2 ± 13.2
%REC/%LAM	0.38 ± 0.20	0.35 ± 0.28	0.32 ± 0.31

Values mean ± standard deviation.

(b)

Groups	A versus C	B versus C	A versus B	A and B versus C	A versus B and C
CMAP amplitudes		NS ()
F-wave persistence
%REC/%LAM >0.35		NS ()	NS ()

Group A: diabetic neuropathies; Group B: diabetes and other diagnoses; Group C: nondiabetic neuropathies.
-tests.
Mann-Whitney test.