Chronic Energy Deficiency (KEK) in pregnant women is still a significant nutritional problem and is related to the incidence of Low Birth Weight Infants (BBLR). Inadequate intake of energy and nutrients during pregnancy can inhibit fetal growth and increase the risk of adverse pregnancy outcomes. This study aims to determine the relationship between KEK in pregnant women and the incidence of BBLR at the Sabatai Health Center. The study used an observational analytical design with a cross-sectional approach. A total of 60 respondents were included through the total sampling technique. Secondary data were obtained from maternal medical records, antenatal care registers, and childbirth records. SEZs were identified based on Upper Arm Circumference (LILA) < 23.5 cm, while BBLR was set in infants with a birth weight of < 2,500 grams. Data analysis was carried out using descriptive statistics and the Chi-Square test with a significance level of 0.05. The results showed that 22 respondents (36.7%) experienced KEK and 18 babies (30.0%) were born with BBLR. Of the mothers with KEK, 63.6% gave birth to BBLR babies, while only 10.5% of mothers without KEK gave birth to BBLR babies. Statistical analysis showed a significant relationship between pregnant women's KEK and the incidence of BBLR (p = 0.000). These findings confirm the importance of early nutrition screening, nutrition education, nutritional status monitoring, and optimization of antenatal services to reduce the incidence of BBLR.
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