Table 3.

Results of quantitative analysis of fractional anisotrophy in study and control groups.

	Study group (39)	Control group (36)	P valueb
Fractional anisotrophya
L2–L3	0.23 ± 0.09	0.20 ± 0.03	0.19
L3–L4	0.27 ± 0.11	0.22 ± 0.06	0.01
L4–L5	0.32 ± 0.08	0.25 ± 0.07	0.01
L5–S1	0.36 ± 0.08	0.30 ± 0.05	0.005

^aData are expressed as mean values ± standard deviation.

^bNumbers are calculated with the two-tailed t test for equality of means.