The aim of this study was to analyze the correlation of knowledge, attitudes and behaviors of a mother about breastfeeding with the nutritional status of children aged 6-23 months by using cross sectional design. The target population were all mothers with children aged 6-23 months. The samples were 179 respondents using purposive sampling techniques. Retrieval of data was done using questionnaires and structured interviews. Statistical calculation performed using univariate and bivariate analysis with chi-square test. The result showed that there was no correlation between maternal knowledge with BB/U (p=0,056), though there was a correlation between maternal attitudes with BB/U (p=0,000) and maternal behaviors with BB/U (p=0,000). It is concluded that there was significant correlation between attitudes and behavior of mothers with nutritional status of children aged 6-23 months. It is suggested to nutrition counselor to add more education related to exclusive breastfeeding. 
                        
                        
                        
                        
                            
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