Determinants of underweight among lactating mothers in public health facilities, Siraro District, Southern Ethiopia: unmatched case-control study.

Background: Ethiopia is reported to have one of the highest prevalence of underweight among lactating mothers in Africa. In our study setting, the nutritional report from the district health office showed a high number of underweight lactating mothers and recurrent malnutrition problems. However, the determinants of underweight among lactating mothers were not well understood in our study setting. The study aimed to assess the determinants of underweight among lactating mothers in public health facilities of Siraro District, Southern Ethiopia.

Methods: Unmatched case control study was conducted among 390 (130 cases and 260 controls) lactating mothers in public health facilities of Siraro District from April 30 to May 30/2022. Cases were lactating mothers with BMI < 18.5 kg/m² and controls were mothers whose BMI was ≥ 18.5 kg/m². To identify the determinants of underweight, bivariate and multivariable binary logistic regression analysis were carried out. The final model was interpreted using adjusted odds ratio (AOR), along with a 95% confidence interval (CI). Significance was declared at p-value < 0.05.

Result: Multivariable logistic regression analysis revealed that having; antenatal care visits [AOR = 0.43, 95% CI (0.26,0.72)], latrine availability [AOR = 0.50,95% CI (0.27,0.93)], poor food consumption score [AOR = 5.40, 95% CI (3.15,9.27)], inadequate dietary diversity score [AOR = 1.66, 95% CI (1.20,2.78)], medium [AOR = 3.34, 95% CI (1.52,7.33)] and poor wealth index [AOR = 6.32, 95%CI(3.12,12.81)] were significantly associated with being underweight among lactating mothers.

Conclusion: Antenatal care visits, latrine availability, poor food consumption scores, inadequate dietary diversity score, medium and poor wealth index were the determinants of underweight. A multi-sectoral approach focusing on latrine construction, economic empowerment and food diversification, as well as ongoing awareness creation, is essential to increase the nutritional status of lactating mothers and break the vicious cycle of malnutrition.