Table 8.

Change in multifidus muscle fat in the two treatment groups from pre-treatment to 2-year follow-up

	Rehabilitation (n = 63)	Surgery (n = 63)
Improvement in 1 level	1a	0
No change	61	56
Deterioration in 1 level	1b	5c
Deterioration in 2 levels	0	2d

^aChange from grad 1 to grade 0

^bChange from grade 0 to grade 1

^cAll changes were from grade 0 to grade 1

^dOne patient changed from grade 0 to grade 1 in two levels, one patient changed from grade 0 to grade 1 in one level and from grade 1 to grade 2 in one level