方法采用病例对照研究和中药治疗组自身前后对照研究。
Methods Case control study and self-control study in Chinese herbal treatment group were conducted.
方法采用自身前后对照研究，观察治疗4周后头痛疼痛程度、发作次数、持续时间和伴随症状的评分情况。
Methods The scores of pain extent, attack times, lasting time and accompanied symptoms of headache were investigated before treatment and after treatment of 4 weeks.
设计：随机、治疗前后自身对照研究。
DESIGN: a randomized self controlled study before and after treatment.
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