<![CDATA[Background: Puberty involves physical and psychological changes that may affect menstrual regularity. Polymenorrhea, defined as menstrual cycles shorter than 21 days, may be associated with nutritional status and stress. Hormonal imbalance may contribute to this condition, while nutritional and psychological factors warrant attention when examining menstrual health during adolescence, particularly in local community settings. Objective: This study aimed to examine the associations of nutritional status and stress levels with polymenorrhea among adolescent girls. Methods: The study was conducted in 2025 among adolescent girls belonging to Karang Taruna youth organizations in Semarang City, Indonesia. Of 150 girls assessed for eligibility, 135 met the criteria and agreed to participate; 125 with complete data were included in the final analysis.Nutritional status was assessed using BMI-for-age derived from anthropometric measurements. Stress was assessed using the seven-item stress subscale of the DASS-21. Menstrual cycle length and history of polymenorrhea were assessed through structured interviews. Data were analyzed using chi-square tests and multivariable logistic regression. Results: Obesity was significantly associated with higher odds of polymenorrhea compared with normal nutritional status (aOR = 3.45; 95% CI: 1.47–8.15; p = 0.004). High stress levels were also significantly associated with higher odds compared with low stress levels (aOR = 5.12; 95% CI: 2.07–12.65; p < 0.001). Age, age at menarche, and physical activity were not significantly associated with polymenorrhea. Conclusion: Obesity and high stress levels were significantly associated with polymenorrhea among adolescent girls. These findings support the consideration of nutrition education emphasizing a balanced diet and stress-management strategies in adolescent menstrual health programs.]]>
