The incidence of Low Birth Weight (LBW) in Tanjungharjo Community Health Center Bojonegoro (6.60%) is higher than the prevalence of LBW in Bojonegoro (4.72%). The purpose of this study was to analyze the risk factors for pregnant women against LBW in Tanjungharjo Bojonegoro Health Center. Method. This study was an observational analytic study, a case-control study design, conducted retrospectively. The population is mothers who give birth to babies in 2018 at the Tanjungharjo Health Center. Case comparison: control sample is 1: 2, i.e. 20:40. Test analysis with chi square test, while multivariate analysis using multiple logistic regression. The results of the study: showed that the variables affecting the incidence of LBW infants were age and anemia in pregnant women. Variables that had no effect were education, parity women's occupation, regularity of ANC examinations and LBW history. The results of multivariate analysis found 4 factors included in the final modeling, namely the age of pregnant women, anemia of pregnant women, maternal parity and regularity of ANC examination. Risk factors that significantly influence the incidence of LBW are age (Ρ = 0.009) and anemia (Ρ = 0.014). Age (Exp. B: 21,706) is more dominant influence on the incidence of LBW compared to anemia (Exp. B: 4,906). Based on these results the researchers suggest that the Health Service Institution needs to reorganize strategies to reduce the incidence of LBW infants, namely by maturing marital age, pregnancy in a healthy reproductive age period and prevention of anemia in WUS.
