预防接种服务形式与服务周期和基础免疫接种率的典型相关分析

Canonical Correlation Analysis of Relationships between the Forms and Periods of EPI Service with Children Basic Vaccination Rates

目的：探讨不同免疫服务形式和服务周期对计划免疫基础免疫接种率的影响。方法：按两阶段PPS法抽取审评单位，调查预防接种服务形式、服务周期和基础免疫接种率，在整个调查过程中予以质量控制，并应用SAS6．12进行典型相关分析和冗余度分析。结果：免疫服务形式与服务周期和儿童计划免疫基础免疫接种率两组变量间存在相关关系（P〈0．01），X1（乡集中接种）、X4（周旬接种）和X6（月接种）与基础免疫接种率之间存在正相关关系，而X3（入户接种）、X7（按双月接种）、X8（其他周期接种）则存在负相关关系，其中以X3（相关系数-0．339）和X8（相关系数-0．727）作用最为显著；Y1～Y7 7项接种率指标对典型变量的贡献大致相同，其中Y6（乙肝疫苗首针及时率）稍低。结论：X3（入户接种）、X7（按双月接种）、X8（其他周期接种）是目前影响我国儿童计划免疫基础免疫接种率提高的最主要免疫组织形式。

Objective： To explore the correlative relationship between the forms and periods of EPI service and basic vaccination rate. Method： To get the censored units by two-stage PPS sampling, investigate its service forms and service periods of EPI, together with basic vaccination rate. Quality control measures were managed through investigations. Software SAS 6. 12 was applied for analysis of canonical correlation and redundancy. Results The correlative relationship exists between the forms and periods of EPI service and basic vaccination rate（P〈0. 01）. The more percent of factor X1 （vaccination at rural hospital）. X4 （vaccination in weekly or 10-day way） and X6 （vaccination in longer than two-monthly way）, the higher basic vaccination rate. The more percent of factor X3 （vaccination at home）.X7 （vaccination in weekly or 10-day way）and X8 （vaccination in longer than two-monthly way） ,the less basic vaccination rate. Of all factors,X8 （r=-0. 727） plays the most negative role in improving basic vaccination rate. Conclusions： The factors of X3 （vaccination at home）, X7 （two-monthly vaccination ） and X8 （vaccination in seasonly or longer interval way） are the most adverse of improving children rate of basic vaccination in our country now.