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Table 2: Pain instruments, baseline, 1 month, and change scores
No. of Items No. of Response Options Baseline (mean) (median, range) 1 Month (mean) (median, range) Change Score (1 month, baseline) (mean) Change Score (1 month, baseline) (SD) (95% CI for SD) P Value^a
RMDI 23 2 17.6 ± 4.8 (19, 1–23) 14.6 ± 5.5 (16, 0–23) −3.1 5.2 (1.6–4.6) <.0001
PROMIS PF t-score 10 5 29.7 ± 6.8 (30, 14–41) 33.4 ± 6.1 (32.7, 18.7–49) 3.6 5.4 (2.1–5.1) <.0001
PROMIS PI t-score 6 5 67.2 ± 7.7 (67.4, 32.7–78.3) 60.8 ± 9.6 (61.8, 41–78) −6.3 10.1 (2.3–3.5) <.0001
PROMIS PB t-score 7 6 62 ± 3.6 (62.5, 52–72) 59 ± 5 (59.2, 36–65) −3.1 5.2 (1.6–4.5) <.0001
Average pain in past 24 hr, NRS 1 11 5.5 ± 2 (6, 0–9) 3.7 ± 2.45 (3, 1–8) −1.9 2.9 (−1 to −2.7) <.0001
Note:—CI indicates confidence interval; PB, pain behavior; PF, physical function; PI, pain interference.

 
↵a Pair-wise t test.