Table 6

Postoperative improvement over predetermined time periods for other patient-reported outcomes.

Postoperative Improvement
Mean ± SD (n)
PROMIS ≥35		 P Valuea Postoperative Improvement
Mean ± SD (n)
PROMIS ≥35		 P Valuea
ODI
 Preoperative————
 6 weeks 9.7 ± 17.7 (49) <0.001 8.4 ± 18.2 (57) 0.001
 12 weeks 13.4 ± 14.6 (42) <0.001 14.5 ± 21.1 (55) <0.001
 6 months 17.1 ± 15.0 (47) <0.001 19.7 ± 20.3 (44) <0.001
 1 year 19.5 ± 10.8 (20) <0.001 18.8 ± 27.1 (26) <0.001
VAS Back
 Preoperative————
 6 weeks 2.9 ± 2.7 (47) <0.001 2.3 ± 3.2 (57) <0.001
 12 weeks 2.9 ± 2.6 (41) <0.001 2.7 ± 3.1 (55) <0.001
 6 months 2.9 ± 3.1 (46) <0.001 2.2 ± 3.6 (43) <0.001
 1 year 4.1 ± 3.1 (20) <0.001 2.8 ± 4.5 (26) 0.004
VAS Leg
 Preoperative————
 6 weeks 2.6 ± 3.1 (47) <0.001 3.2 ± 3.0 (57) <0.001
 12 weeks 2.9 ± 2.9 (42) <0.001 3.7 ± 3.2 (55) <0.001
 6 months 2.9 ± 3.4 (47) <0.001 3.7 ± 3.3 (43) <0.001
 1 year 3.7 ± 3.0 (20) <0.001 2.7 ± 4.0 (26) 0.002
SF-Physical
 Preoperative————
 6 weeks −2.5 ± 9.9 (45) <0.001 −2.2 ± 7.2 (57) <0.001
 12 weeks −3.1 ± 11.0 (36) 0.099 −6.9 ± 10.8 (51) <0.001
 6 months −7.6 ± 10.8 (38) <0.001 −8.6 ± 10.7 (37) <0.001
 1 year −12.0 ± 9.5 (22) <0.001 −9.8 ± 13.0 (33) <0.001
SF-Mental
 Preoperative————
 6 weeks −3.7 ± 9.1 (45) <0.001 −1.6 ± 8.4 (57) <0.001
 12 weeks −3.5 ± 7.7 (36) 0.011 −2.6 ± 8.4 (51) 0.036
 6 months −1.9 ± 5.7 (38) 0.046 −4.3 ± 8.8 (37) 0.005
 1 year−3.1 ± 10.4 (22)0.179−3.0 ± 8.9 (33)0.067

  • Boldface indicates statistical significance.

  • aP value was calculated using paired Student t test (continuous).

  • ODI, Oswestry Disability Index; PHQ-9, Patient Health Questionnaire-9; SD, standard deviation; SF, Short Form; VAS, visual analog scale.