Collaborative PsychiatricEpidemiology Surveys
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OD3b
About how old were you (the first time you had a period of this sort)?
IF 'ALL MY LIFE' OR 'AS LONG AS I CAN REMEMBER', CODE DON'T KNOW
| Mean | Std Dev | Median | Min | Max |
|---|---|---|---|---|
| 10.41 | 03.74 | 12.00 | 04.000 | 16.000 |
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