OPS 60: Social factors and environmental health across the world, Room 210, Floor 2, August 27, 2019, 1:30 PM - 3:00 PM Background: Traditional biomass fuels remain the most common sources of household energy in most rural areas of the developing world. Biomass in these households is often used in inefficient and poorly vented combustion devices. High concentrations of particulate matter are emitted when the combustion of solid fuels are inadequate, as a result of which, severe respiratory impairment ensues. This study was done to compare the lung function parameters of rural women using traditional cook stoves and improved cook stoves. Methods: In this cluster randomized study, 48 households across 12 hamlets were randomly assigned either to control group (24) or intervention group (24) and one woman in each household participated in the study. Data collection comprised of a structured questionnaire and pulmonary function testing using spirometry. Post bronchodilator spirometric values of Forced vital capacity (FVC), Forced expiratory volume in 1st second (FEV1), etc., were taken for data analysis. Results: Both the groups were comparable. Parameters such as FVC, FEV1,FEF 25 -75% and PEFR values were significantly lower (p< 0.05) during follow up when compared with the baseline measurement in the control group whereas they were increased in the intervention group. The comparison of mean differences between baseline values and follow up values between control and intervention groups showed a significant change in FEV1 (-0.13±0.27 vs 0.04±0.25; p value - 0.02) and FEF25-75% (-0.30±0.69 vs 0.15±0.47; p value 0.01). Conclusion: The study highlights the improvement of the lung functions that occur following the use of ICS due to reduction in the emission of particulate matter which has a negative impact on respiratory health signifying the need for an early intervention. Dissemination of this information to health authorities and the general public will help in implementing these intervention strategies in future. Key words Improved cook stove, pulmonary function tests, respiratory health, spirometry

TPS 723: Low and middle income countries: sanitation infections and other health effects, Exhibition Hall, Ground floor, August 26, 2019, 3:00 PM - 4:30 PM Background: Due to inefficient designs and use, traditional biomass stoves emit fine particulates, and other toxics causing additional burden of diseases for a major population in developing countries. Keeping this fact in mind, this study was conducted in a few villages of Andhra Pradesh, India providing with a cost effective intervention. PM2.5 was adopted as the surrogate exposure burden and compared it's concentration with pre- and post-intervention measurements. Methods: This study was a cluster-randomized with 2 groups of 24 households each and was randomized to a traditional wood stove (control) and an efficient wood burning stove (intervention). However, the present study represents PM2.5 concentration in 24 intervention households between pre- and post-intervention periods. Area and personal measurements were done using standard protocols. Area samplings were conducted during dinner and breakfast cooking (3 hrs; N=24), non-cooking (6 hrs. after dinner and breakfast cooking; N=12) and kitchen-living room (24 hrs; N=6), whereas personal sampling with 6 participants for 3 hours during dinner cooking. Results: Pre- and post- PM2.5 concentrations (Mean ± SD) during dinner cooking periods were 376.07± 366.50 and 152.64± 106.86 µg/m3, whereas, for breakfast were 725.40±980.64 µg/m3 & 335.84±404.48 µg/m3, respectively. However, for post dinner and post breakfast non-cooking periods, concentrations were 86.54±38.71 & 55.42±37.60 µg/m3 and 116.44±68.70 & 119.30±194.76 µg/m3, respectively. Mothers and Children personal PM2.5 concentrations were 350.18±282.89 & 142.52±123.82 µg/m3 and 476.98±811.43 & 426.13±741.59 µg/m3, respectively. For 24-hours pre- & post- kitchen and living area, values were 397.71±671.04 & 114.39±134.07 µg/m3 and 157.04±235.49 & 47.35±39.91 µg/m3, respectively. Conclusion: The study showed clear reduction of PM2.5 exposure concentration in intervention period might be due to comparatively lesser amount of fuel use and higher efficiency of the improved stoves. As per users' perception, they could save some cooking time and felt better cooking environment in intervention period.

SummaryBackgroundFamily‐based behavioural weight loss treatment (FBT) for childhood obesity helps families develop strategies to facilitate healthy choices in their home and other environments (e.g. home neighbourhood). The current study examines how the home food environment, both pre‐FBT and post‐FBT, and the neighbourhoods in which families live are associated with child weight and weight‐related outcomes in FBT.MethodsParent–child dyads (n = 181) completed a 16‐session FBT programme and completed home environment, anthropometric and child dietary/activity assessments at pre‐FBT and post‐FBT. Parents reported on availability of food, electronics and physical activity equipment in the home. The neighbourhood food and recreation environments around each dyad's residence was characterized using existing data within a geographic information system.ResultsFamilies successfully made healthy home environment modifications during FBT. Regression models showed reducing RED (e.g. high‐energy‐dense and low‐nutrient‐dense) foods and electronics in the home during FBT had positive effects on child weight and weight‐related outcomes. No neighbourhood food or recreation environment variables were significantly related to outcomes, although having a larger density of public recreation spaces was associated with increases in physical activity at the trend‐level.ConclusionsModifying the home environment, specifically reducing RED foods and electronics, may be particularly important for FBT success.