Abstract
Hepatitis B remains a significant public health concern and can be transmitted vertically from mother to child. Screening among pregnant women is implemented through the national triple elimination program to prevent mother-to-child transmission. Identifying associated risk factors is essential to strengthen preventive strategies. This study aimed to determine factors associated with hepatitis B infection among pregnant women.A cross-sectional study was conducted at a community health center in Mataram City. The population consisted of 56 pregnant women diagnosed with hepatitis B in 2024. Using a 1:1 ratio of hepatitis B-positive and hepatitis B-negative pregnant women, with an additional 10% to anticipate dropouts, the final sample comprised 122 respondents selected through purposive sampling based on inclusion and exclusion criteria.Bivariate analysis using the Chi-square test showed significant associations between hepatitis B infection and maternal knowledge (p = 0.001) as well as age (p = 0.021). Attitude, family support, health worker support, education, employment status, and parity were not significantly associated (p > 0.05). Logistic regression analysis (? = 5%) confirmed that knowledge (p = 0.000) and age (p = 0.027) were significantly related to hepatitis B infection. At ? = 10%, education also showed a significant association (p = 0.070).Multivariate logistic regression revealed that knowledge (OR = 3.892; p = 0.000), education (OR = 2.682; p = 0.011), and age (OR = 0.298; p = 0.027) were significant predictors, collectively explaining 30.2% of hepatitis B incidence. In conclusion, maternal knowledge, age, and education are significantly associated with hepatitis B infection among pregnant women.