Lyon A K, Bardhan M, Barker P, Wilson P
Public Health Directorate, South Birmingham PCT, Birmingham, B13 8JL, UK.
J Public Health (Oxf). 2006 Dec;28(4):351-4. doi: 10.1093/pubmed/fdl050. Epub 2006 Sep 6.
The childhood vaccination programme in Coventry Primary Care Trust (PCT) has resulted in consistently low uptake rates for a number of years. After an evaluation of operational processes, an examination of the data systems was performed.
The under-reporting of vaccinations performed and methodology issues were investigated using data collected by the Child Health Information Department (CHID) and the Finance Department.
Data held by the Finance Department result in an uptake rate of between 0.79 and 1.92% higher than those held by the CHID. Locally, the Southwest Child Health (SWIFT) system, the programme used to calculate uptake rates by many of the PCTs across the country, excludes those children residing outside the boundary but registered within it. Coventry PCT's Cover of Vaccination Evaluated Rapidly (COVER) statistics are based on a subgroup of the responsible population.
The computer technology currently utilized by the NHS provides inaccurate statistics for the COVER programme. Systematic under-reporting to the CHID results in moderately lowered uptake rates. A programming anomaly in the SWIFT system has resulted in the collection of data based on a subgroup of the responsible population. This undermines the validity of the statistics collected and renders comparability of data between different PCTs, particularly those using different systems, difficult.
考文垂初级保健信托基金（PCT）的儿童疫苗接种计划多年来接种率一直很低。在对操作流程进行评估后，对数据系统进行了检查。
利用儿童健康信息部（CHID）和财务部收集的数据，对已接种疫苗的漏报情况和方法问题进行了调查。
财务部掌握的数据显示的接种率比CHID掌握的数据高0.79%至1.92%。在当地，西南儿童健康（SWIFT）系统是全国许多初级保健信托基金用来计算接种率的程序，该系统将居住在边界外但在边界内登记的儿童排除在外。考文垂初级保健信托基金的快速评估疫苗接种覆盖率（COVER）统计数据基于责任人群中的一个子群体。
国民保健制度目前使用的计算机技术为COVER计划提供了不准确的统计数据。向CHID的系统性漏报导致接种率适度降低。SWIFT系统中的一个编程异常导致基于责任人群中的一个子群体收集数据。这削弱了所收集统计数据的有效性，使得不同初级保健信托基金之间的数据可比性变得困难，尤其是那些使用不同系统的初级保健信托基金。
