Table 2.

Degree of correlation between SEP and H-reflex obtained computing the Pearson's coefficient.

age	sex	level	r	df	p = 0.05	P = 0.01
31	F	D5-L4	0.501	31	0.351	0.447
13	F	D5-L1	0.551	30	0.355	0.456
17	M	D3-L3	0.746	36	0.321	0.413
20	F	D5-L3	0.611	47	0.282	0.365
14	F	D4-L4	0.580	30	0.355	0.456
17	F	D3-L1	0.617	40	0.304	0.393
16	F	D3-L4	0.489	41	0.299	0.386
53	F	D4-L5	0.385	42	0.294	0.379

The Pearson's coefficient is r, the freedom degree is df, p is the confidence level of test. When the Pearson's coefficient r is greater than the value reported to the column p, there is a correlation with a confidence level of p = 0.05 or p = 0.01. The correlation between the SEP and H-reflex is verified both for p = 0.05 and p = 0.01 for all the cases studied.