Table 9.

Clinical outcome at 2-year follow-up in the surgery group for patients with increased multifidus muscle fat versus those without

	No change in multifidus muscle fat	Increased multifidus fat in 1 or 2 levels	p-value
Pain at 2 year (mean (SD)) (n = 54/7)	29.2 (26.2)	63.0 (33.5)	<0.01*
ODI at 2 year (mean (SD)) (n = 56/7)	16.8 (14.2)	42.6 (20.3)	<0.001*
Work status at 2 year (n/ % working) (n = 55/6)	36 (65.5)	1 (16.7)	0.03#

ODI, Oswestry Disability Index

*Independent-sample t-test

#Mid-P exact test