Re-examination sampling methods of national immunization survey for national immunization program vaccines coverage at the township level by the national level in 2013, China / 中华预防医学杂志

<p><b>OBJECTIVE</b>To review the re-examination sampling method and procedure of national immunization survey for the national immunization program vaccines coverage at the township level by the national level in 2013, China.</p><p><b>METHODS</b>According to the result of immunization coverage at the township level through self-assessment by county, all townships were stratified by whether a township with ≥ 90% immunization coverage for the second dose of measles-containing vaccines (MCV2), and a township was urban or rural. After then, 2 townships for each province were randomly sampled from those strata through the surveyselect procedure of the statistics analysis system 9.2 (SAS 9.2).</p><p><b>RESULTS</b>64 townships were randomly sampled from 32 provincial units for the re-examination, i.e. an urban township and a rural township each province, of which there were 38 townships with ≥ 90% MCV2 coverage and 26 townships with < 90% MCV2 coverage. There were 24 urban townships, 2 rural townships with < 90% MCV2 coverage and 8 urban townships, 30 rural townships with ≥ 90% MCV2 coverage, respectively.</p><p><b>CONCLUSIONS</b>Based on the information of the self-assessment result of immunization coverage survey by counties, Stratified randomized sampling were employed for the re-examination through the Surveyselect procedure of statistics analysis system (SAS) to implement the sampling procedure. This can enhance the sampling efficiency, ensure the randomness of the sample, and make the survey much more representative and comparable.</p>

Discussion on Synthetic Evaluation Index System and Method for Routine Immunization Quality / 中国疫苗和免疫

Four kinds of indexes were selected to build up the routine immunization quality evaluating system. The indexes were the estimated immunization coverage rate, timely reporting rate of routine immunization report forms, incidence level of diseases related to EPI, and the external factors influencing routine immunization. By using deducing mark method, we evaluated the synthetic routine immunization quality on city and county level in Hubei Province. This evaluating index system and method have the characteristics of easy to perform, credibility, reasonableness and can be applied widely.