Table III.

Response to injection association with PRO

	Negative response (N = 22)	Positive response (N = 74)	P-value a b
VAS pain score (mean ± SD)
Preoperative	52.8 ± 22.6	55.1 ± 25.3	0.702
2 week Δ	−16.5 ± 23.4	−12.3 ± 27.7	0.537
6 week Δ	−33.1 ± 25.1	−31.6 ± 33.1	0.856
4 month Δ	−33.8 ± 24.0	−39.7 ± 28.5	0.398
Final Δ	−33.2 ± 33.2	−40.5 ± 28.6	0.314
PROMIS PI (mean ± SD)
Preoperative	59.1 ± 4.3	59.9 ± 6.2	0.583
2 week Δ	5.9 ± 7.1	4.6 ± 7.6	0.494
6 week Δ	−3.3 ± 6.2	−4.0 ± 8.4	0.715
4 month Δ	−5.2 ± 7.8	−10.6 ± 8.9	0.015
Final Δ	−7.5 ± 10.4	−11.9 ± 8.4	0.045
PROMIS PF (mean ± SD)
Preoperative	42.6 ± 6.0	41.5 ± 5.7	0.416
2 week Δ	−14.4 ± 8.4	−11.8 ± 7.4	0.179
6 week Δ	0.1 ± 6.7	0.2 ± 7.7	0.939
4 month Δ	4.1 ± 7.8	10.0 ± 10.6	0.023
Final Δ	7.8 ± 11.3	13.4 ± 10.7	0.037
PROMIS depression (mean ± SD)
Preoperative	45.7 ± 9.2	44.1 ± 10.1	0.518
2 week Δ	−1.1 ± 7.2	−0.5 ± 7.5	0.724
6 week Δ	−2.2 ± 7.2	−2.7 ± 7.1	0.773
4 month Δ	−3.7 ± 7.0	−4.0 ± 7.9	0.884
Final Δ	−0.9 ± 10.2	−3.5 ± 8.9	0.248

SD = Standard deviation; VAS = Visual Analog Scale; PROMIS = Patient-Reported Outcomes Measurement Information System; ∆ = postoperative score − preoperative score; PI = pain interference; PF = physical function.

^a P-values calculated for each category using independent t-tests.

^bBoldface indicates statistical significance.