OBJECTIVE To evaluate countermeasures in reducing the rate of missing report on nosocomial cases.

目的评价干预措施对降低医院感染漏报率的效果。

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CONCLUSION Although missing report rate is low, there are missing reports in part of medical institutions, comprehensive measures should be taken to improve the report quality.

结论医疗机构传染病漏报率较低，但仍存漏报现象，应采取综合性措施，更进一步提高报告质量。

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Passive surveillance system, because of too high missing report rate, is not suitable to be used to estimate the incidence and only can be use for the estimation of epidemic trend.

被动监测系统漏报率过高，其监测数据需要通过漏报调查，才能计算校正发病率。

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