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Comparison of the shoulder scores (mean ± SD).
| Group | N | Before treatment | After treatment |
|---|---|---|---|
| PN | 34 | 13.61 ± 3.77 | 31.22 ± 3.34★▲ |
| SN | 34 | 14.34 ± 3.89 | 25.43 ± 3.83▲ |
Note: “★”: compared with the small needle-knife group, P < 0.05. “▲”: compared with the situation before treatment, P < 0.05.
