<![CDATA[Background: Every year, more than 1.4 million children worldwide die from diseases that can be prevented by immunization. Immunization is still one of the most cost-effective preventive meaÂsuÂres to reduce mortality and morbidity among childÂren. This study aimed to analyze the influÂence of posyandu contextual and maternal chaÂracÂteristics on the provision of complete basic imÂmuÂniÂzaÂtion in children aged 12-23 months.Subjects and Method: This was an observaÂtional analytic study with a cross sectional design. The study was conductÂed at 25 integrated health posts (posyandu) in Jember, East Java, Indonesia from SepÂtemÂber to October 2019. A sample of 200 mothers who had children aged 12-23 months was selected by simple random sampling. The dependent variable was complete basic immunization. The independent variables were maternal education, maternal knowledge, parity, maternal emÂployÂment status, family income, maternal attitude, family support, and contextual effect of posÂyandu. The data were collected by questionnaire and analyzed by a multilevel logistic regression analysis run on Stata 13.Results: Provision of complete basic immunizaÂtion increased with maternal education ≥Senior high school (b= 2.99; 95% CI= 1.26 to 4.73; p= 0.001), good maternal knowledge (b= 1.93; 95% CI= 0.38 to 3.53; p= 0.018), family income ≥Rp 2,170,000 (b= 1.18; 95% CI= -0.15 to 2.50; p= 0.081), positive maternal attitude (b= 1.92; 95% CI= 0.45 to 3.39; p= 0.011), and strong family supÂport (b= 2.29; 95% CI= 0.62 to 3.96; p= 0.007). Complete basic immunization decreased with maÂternal parity ≥3 (b= -1.35; 95% CI= -2.68 to -0.01; p= 0.048) and mother working outside the hoÂme (b= -2.67; 95% CI= -4.49 to - 0.85; p= 0.004). Posyandu had contextual effect on the proÂviÂsiÂon of complete basic immunization in children aged 12-23 months with ICC= 23.65%.Conclusion: Provision of complete basic imÂmuÂnization increases with maternal education ≥SeÂnior high school, good maternal knowledge, faÂmiÂly income ≥Rp 2,170,000, positive maternal atÂtitude, and strong family support. Complete basic immunization decreases with maternal parity ≥3 and mother working outside the home. Posyandu has contextual effect on the proÂvision of comÂpleÂte basic immunization in children.Keywords: basic immunization, children aged 12-23 months, integrated health post, multilevel analysisCorrespondence: Revina Fiandany Erynda. Masters Program in Public Health, Universitas Sebelas Maret. Jl. Ir. Sutami 36A, Surakarta 57126, Central Java. Email: revinaerynda@gmail.com. Mobile: 085Â36Â18Â0003.Journal of Maternal and Child Health (2020), 5(2): 154-166https://doi.org/10.26911/thejmch.2020.05.02.05]]>
