TABLE 4.

Study Score Comparisons²⁵,²⁶

Studies	Preoperative	Postoperative, at 1 y
Swedish 2017, mean (95% CI)a
SF-36 physical component	37.0 (36–38)	46.0 (44–47)
ODI	41.0 (40–43)	21.0 (19–23)
SPORT 2009, mean (SD)b
SF-36 physical function	30.4 (21.9)	58.5 (1.6)
ODI	45.5 (16.9)	19.2 (1.3)
This study, mean (SD)
SF-36 physical function	28.9 (19.0)	59.3 (21.3)
ODI	24.8 (7.9)	14.5 (7.6)

Abbreviations: ODI, Oswestry Disability Index; SF-36, short form-36; SPORT, Spine Patient Outcomes Research Trial.

^aPosterolateral fusion with instrumentation group.

^bPosterolateral instrumented fusion with pedicle screws group.