| Dysmenorrhoea rate (VAS score) | |||
|---|---|---|---|
| Study | Electrode | Balloon | Statistical test |
| At 12 months' follow‐up | |||
| Abbott 2003 | N=37 Median score (range): 0 (0, 96) | N=18 Median score (range): 29 (0, 77) | Mann Whitney P=0.008 |
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