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目的 分析山东省分年龄组儿童国家免疫规划 (NIP) 疫苗常规免疫接种率.方法 通过山东省预防接种信息系统收集适龄儿童NIP疫苗接种信息, 采用描述流行病学方法分析疫苗接种率.结果 收集山东省1岁、3岁、7岁儿童分别为186.21万名、145.38万名、126.23万名, 所有NIP疫苗剂次接种率分别介于88.64％-99.79％、95.26％-99.70％、73.28％-99.46％之间;常规免疫全程接种率分别为87.52％、94.38％、73.60％, 东、中、西部地区1岁组全程接种率分别为90.51％、86.39％、85.95％, 3岁组全程接种率分别为96.51％、94.13％、93.14％, 7岁组全程接种率分别为82.96％、77.93％、67.62％.结论 山东省适龄儿童NIP疫苗常规免疫接种率总体较高, 但大年龄儿童应接种疫苗剂次和西部地区接种率偏低.“,”Objective To evaluate childhood routine immunization coverage by age in Shandong province. Methods We collected immunization data of age-eligible children using the Shandong Immunization Information System for a descriptive analysis of immunization coverage. Results This study included 186.21, 145.38, and 126.23 ten-thousand children aged 1, 3, and 7 years, respectively; coverage levels of all NIP vaccines f or the three age groups ranged88.64％-99.79％, 95.26％-99.70％, and 73.28％-99.46％, respectively. Full-series coverage of all NIP vaccines for the three age groups was 87.52％, 94.38％, and 73.60％, respectively. Full-series coverage in eastern, central and western regions was 90.51％, 86.39％, and 85.95％ for 1 year olds; 96.51％, 94.13％, and 93.14％ for 3 year olds; and 82.96％, 77.93％, and67.62％ for 7 year olds, respectively. Conclusions Overall routine coverage with NIP vaccines was high among ageeligible children in Shandong, while coverage among older children or in western regions was low.