Methods 199 workers exposed to ACN and 43 control workers were investigated by questionnaire including cognitive function and aging sign of human body such as canities,pigmentation etc.

• 方法 对 199名丙烯腈接触工人 (接触组 )及 4 3名无毒物接触史工人 (对照组 )的白发、色素沉着等衰老体征进行观察 ,并使用记忆力测试自评量表对两组人群进行认知功能问卷调查。