Table 6.

Statistically Significant Depth-Dependent Differences in PEF

Depth	Result
1	N > I
2	N > I
6	T > S
	T > I
7	T > S
8	T > S
9	T > S
	T > I
	T > N

A summary of the statistically significant depth-dependent differences in FS; all differences listed are P < 0.01 (see Fig. 9).