Effect of Vented Improved Cookstove Intervention on Adverse Birth Outcomes and Common Mental Disorders

INTERVENTION: No intervention Vented improved cookstove intervention CONDITION: ; Mental and Behavioural Disorders ; Pregnancy and Childbirth Mental and Behavioural Disorders Pregnancy and Childbirth PRIMARY OUTCOME: The primary objective of this study will be to assess the effect of the vented improved cookstove intervention on adverse birth outcomes. Thank you for the opportunity to clarify our study's timeline and the specific timing of outcome assessments.; To address the query regarding the "June 2026 to March 2027" period, the study spans a total duration of 10 months. We have delineated this timeline into distinct pre‐, during‐, and post‐intervention observation phases as detailed below:; ??Pre‐Intervention Phase (Baseline Data Collection 2 Months): Initiating in June 2026 and concluding in July 2026, this baseline phase involves household‐level data collection via KoboToolbox. This period will establish benchmarks for maternal characteristics, including screening for common mental disorders (CMDs), prior to the deployment of the vented improved cookstove intervention.; ??During‐Intervention Phase (Six‐Month Follow‐Up 6 Months): This phase, spanning from August 2026 to January 2027, entails continuous monitoring of household metrics and real‐time tracking of intervention adherence. This regular follow‐up ensures data rigor and consistency across the ten designated administrative units.; ??Post‐Intervention Phase (Endline Evaluation 2 Months): Conducted throughout February and March 2027, this final phase involves endline household assessments to evaluate the intervention's impact. Key outcomes: incidence of adverse birth outcomes will be measured against baseline data. This phase will conclude with data cleaning and preparation for the final analysis. SECONDARY OUTCOME: The secondary objective of this study will be to assess the effect of the vented improved cookstove intervention on common mental disorders among pregnant women. Thank you for the opportunity to clarify our study's timeline and the specific timing of outcome assessments. ; To address the query regarding the "June 2026 to March 2027" period, the study spans 10 months. We have delineated this timeline into distinct pre‐, during‐, and post‐intervention observation phases as detailed below: ; ?Pre‐Intervention Phase (Baseline Data Collection — 2 Months): Initiating in June 2026 and concluding in July 2026, this baseline phase involves household‐level data collection via KoboToolbox. This period will establish benchmarks for maternal characteristics, including screening for common mental disorders (CMDs), before the deployment of the vented improved cookstove intervention. ; ?During‐Intervention Phase (Six‐Month Follow‐Up — 6 Months): This phase, spanning from August 2026 to January 2027, entails continuous monitoring of household metrics and real‐time tracking of intervention adherence. This regular follow‐up ensures data rigor and consistency across the ten designated administrative units. ; ?Post‐Intervention Phase (Endline Evaluation — 2 Months): Conducted throughout February and March 2027, this final phase involves endline household assessments to evaluate the intervention's impact. Key outcomes: incidence of common mental disorders among pregnant women will be measured against baseline data. This phase will conclude with data cleaning and preparation for the final analysis. INCLUSION CRITERIA: This study will recruit all pregnant women in their first and second trimester (1–24 weeks, based on self‐reported last menstrual period) from households in selected Mecha HDSS clusters that rely solely on traditional open‐fire cookstoves. Eligible participants must be the primary household cook and women carrying a live singleton fetus.