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(A) Patient satisfaction with lumbar spine surgery by surgical diagnosis. (B) Prevalence of FBSS in a Japanese population; and influence of FBSS on health-related quality of life and psychological distress. P-values by unpaired t-test: *P<0.001; **P<0.05.
Abbreviations: EQ-5D, EuroQol-5 dimensions; FBSS, failed back surgery syndrome; K6, Kessler psychological distress scale.
