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目的 提高医院感染监测和控制工作的灵敏度。方法 利用 1993～ 1997年医院感染监测资料 ,计算出 5年期间月平均医院感染率 (P) ,根据统计学率的抽样误差与显著性检验方法 ,计算出月平均感染率的标准误(SE)和总体率的 95 %可信区间 (P± 1.96 SE)与总体率的 99%可信区间 (P± 2 .5 8SE) ,求得质控图的上下警戒线和上下控制线 ,据以检验 1998年度每月的数据。结果 南阳市中心医院 1998年所有 12个月的医院感染发病率均在上警戒线以下 ,但有 6个月的发病率处在下控制线以下。结论 借助于质控图不但能够及时发现医院感染发病率的异常升高包括暴发 ,而且可以及时地发现漏报病例的存在
Objective To improve the sensitivity of hospital infection monitoring and control. Methods The monthly average hospital infection rate (P) was calculated from the data of hospital infection monitoring from 1993 to 1997. The standard error of monthly average infection rate (SE) was calculated according to the sampling error and significant test of statistical rate ) And the 95% confidence interval (P ± 1.96 SE) of the overall rate and the 99% confidence interval (P ± 2.58SE) of the overall rate, to obtain the upper and lower cordon and upper and lower control lines of the quality control chart, According to test the monthly data of 1998. Results The incidence of nosocomial infections in Nanyang Central Hospital in 1998 was lower than the warning level in all 12 months. However, the incidence of nosocomial infections in 6 months was below the lower control line. Conclusions With the help of the quality control chart, not only the abnormal increase in the incidence of nosocomial infections can be found in time, including the outbreak, but also the timely detection of the missing cases