2. Outcome: number of sedative tablets.
| Study | Cycle | Herbs (Valerian) | Placebo | ||
| Dolation 2010 | N | mean | N | mean | |
| First | 51 | 1.29 | 49 | 1.59 | |
| Second | 51 | 0.55 | 49 | 1.31 | |
Abbreviations:
N: number of participants
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