Suprascapular nerve block (SNB) v placebo in chronic shoulder pain from degenerative disease or rheumatoid arthritis at 1–12 weeks*
| Outcomes | Follow up | SNB | Placebo | Difference between groups (95% CI) | |
|---|---|---|---|---|---|
| *SPADI = shoulder pain and disability index. Other abbreviations defined in glossary; RBI, NNT, and CI calculated from data in article. | |||||
| †NNT refers to number of shoulders needed to treat. | |||||
| Mean improvement from baseline in shoulder pain and disability (SPADI total scores 0–100) | Week 1 | 17 | 0.66 | 16 (9.9 to 22) | |
| Week 4 | 14 | 0.80 | 13 (6.6 to 19) | ||
| Week 12 | 14 | 2.6 | 11 (3.6 to 18) | ||
| RBI (CI) | NNT (CI)† | ||||
| Number of shoulders that improved by >10 SPADI total scores | Week 1 | 67% | 24% | 186% (74 to 393) | 3 (2 to 4) |
| Week 4 | 65% | 11% | 501% (175 to 1309) | 2 (2 to 3) | |
| Week 12 | 55% | 19% | 192% (60 to 459) | 3 (2 to 6) | |
