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冷藏厂加工间１４６名未婚女工为观察组（平均年龄２１．０６±２．２７，平均工龄３．０２±０．２９），１１２名未婚女服务人员为对照组（平均年龄２０．２±２．０４，平均工龄３．２７±０．２６），对她们的月经情况进行了调查。结果表明：观察组的月经异常发病率明显高于对照组，其差异有非常显著意义。具体表现在月经周期异常、周期延长、经量异常、痛经等方面（Ｐ＜０．０１）。其异常表现与工龄长短无显著性差异（Ｐ＞０．０５）；痛经、周期延长（＞５６天）多在进厂一年左右发病。
A total of 146 unmarried women workers in the cold-processing plant were selected as the observation group (average age 21.06 ± 2.27, average working age 3.02 ± 0.29) and 112 unmarried female service workers as the control group (mean age 20.2 ± 2 .04, the average length of service 3.27 ± 0.26), menstrual conditions were investigated. The results showed that: the incidence of menstrual abnormalities in the observation group was significantly higher than that of the control group, the difference was significant. Specific performance in the menstrual cycle anomalies, prolonged cycle, abnormal volume, dysmenorrhea, etc. (P <0.01). The abnormal performance and length of service no significant difference (P> 0.05); dysmenorrhea, the cycle of prolongation (> 56 days) and more in the factory about one year incidence.