Table 3

Results of the intention-to-treat analysis comparing clinical outcome and muscle function between treatment groups

 Mean (SD) for each groupAdjusted mean difference (95% CI) between groups
General exerciseSpecific exercise
Disability
 Postoperative baseline30.6 (15.9)31.4 (18.2)
 10 weeks13.6 (15.9)15.0 (17.0)−4.0 (−12.1 to 4.0)
 6 months15.0 (20.1)10.1 (12.3)2.2 (−7.5 to 11.8)
Low back pain intensity
 Postoperative baseline2.5 (2.1)2.6 (1.9)
 10 weeks1.6 (1.9)1.7 (1.9)0.3 (−0.6 to 1.2)
 6 months1.5 (1.9)1.6 (1.7)0.3 (−0.7 to 1.3)
Leg pain intensity
 Postoperative baseline1.8 (2.1)2.4 (2.2)
 10 weeks1.0 (1.5)1.4 (1.8)−0.6 (−1.5 to 0.3)
 6 months0.7 (1.2)0.5 (1.0)0.2 (−0.7 to 1.0)
Sciatica frequency
 2-week postoperative baseline8.9 (5.3)10.6 (4.8)
 10 weeks6.0 (5.1)6.4 (4.4)−1.2 (−3.8 to 1.4)
 6 months6.2 (6.3)5.1 (3.4)0.0 (−3.6 to 3.6)
Sciatica bothersomeness
 2-week postoperative baseline6.6 (5.6)7.0 (3.7)
 10 weeks3.5 (3.8)4.2 (3.8)−1.0 (−3.2 to 1.3)
 6 months3.3 (5.1)3.0 (2.4)0.1 (−2.7 to 3.0)
Global rating of change
 10 weeks4.9 (3.2)5.0 (2.6)−0.2 (−1.8 to 1.3)
 6 months3.9 (4.5)5.5 (1.8)−2.0 (−4.3 to 0.4)
Muscle thickness change on side of surgery (%)*
 2-week postoperative baseline2.2 (4.7)3.8 (6.4)
 10 weeks8.1 (7.1)5.5 (6.0)1.9 (−2.2 to 6.0)
Muscle thickness change contralateral to surgery (%)*
 2 week postoperative baseline3.7 (6.1)3.1 (4.9)
 10 weeks8.3 (6.3)8.1 (6.8)−0.6 (−4.3 to 3.0)
  • Values are mean (SD) unless otherwise specified.

  • *Measured at spinal level of surgery.