Among 298 Danish mothers, 30.9% said they used painkillers when they filled in a questionnaire, but 57.2% reported using them when asked in a telephone interview.

在298个丹麦妈妈中有30.9%的人在填写问卷时承认使用止痛剂，但电话访问时却有57.2%的妈妈承认使用。

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Among 298 Danish mothers, 30.9% said they used painkillers when they filled in a questionnaire, but 57.2% reported using them when asked in a telephone interview.

在298个丹麦妈妈中有30.9%的人在填写问卷时承认使用止痛剂，但电话访问时却有57.2%的妈妈承认使用。

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