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Table 3 Efficacy of intrathecal implants in low back pain with out prior surgery (n between 9 and 11)

From: Long-term experience with implanted intrathecal drug administration systems for failed back syndrome and chronic mechanical low back pain

Dimension Variable Pre-Treatment Median (Quartiles) Post-Treatment Median (Quartiles) Z Scorea P valueb
Sensory Pain 9.00 (8.00, 10.00) 6.00 (4.00, 6.00) 2.87 0.0041*
  Pain Relief 8.00 (6.50, 9.50) 4.00 (1.50, 6.00) 2.54 0.0111
Psychological Depression 8.00 (5.50, 10.00) 5.00 (2.00, 6.00) 2.37 0.0178
  Quality of Life 9.50 (8.00, 10.00) 6.50 (3.75, 7.25) 2.68 0.0074
  Coping 8.50 (7.75, 10.00) 6.00 (2.50, 7.00) 2.82 0.0048*
  Dependency 8.00 (7.00, 9.00) 6.00 (5.75, 6.50) 2.72 0.0065
Sociological Sleep 10.00 (9.00, 10.00) 7.50 (4.50, 9.00) 2.68 0.0074
  Work 10.00 (8.50, 10.00) 9.00 (6.50, 10.00) 1.84 0.0658
  Social Life 10.00 (9.00, 10.00) 8.00 (6.00, 8.00) 2.71 0.0067
  Sex Life 9.50 (7.25, 10.00) 9.00 (4.75, 10.00) 1.09 0.2757
  Driving 7.00 (3.00, 8.00) 7.00 (0.00, 8.00) 0.37 0.7114
  Housework 9.00 (7.00, 10.00) 6.00 (5.00, 8.00) 1.50 0.1336
  Mobility 9.00 (7.00, 10.00) 8.00 (6.00, 8.00) 2.84 0.0045*
  1. a The Z score is converted from the Wilcoxon signed ranks test. b A Bonferroni adjustment for the number of tests indicates P < 0.005 (0.05/10) as significant.