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| The Premenstrual syndrome severity of symptoms | Intervention, Mean (SD) | Placebo, Mean (SD) | Z | P value |
|---|---|---|---|---|
| Before intervention | 28.82 (12.28) | 27.72 (11.98) | -0.81 | 0.42 |
| After intervention | 21.76 (13.28) | 18.90 (11.16) | -0.92 | 0.36 |
| The difference | 6.79 (8.8) | 8.82 (7.26) | -1.42 | 0.16 |
