Effects of ambient air pollution on emergency room visits of children for acute respiratory symptoms in Delhi, India

The present study explored the association between daily ambient air pollution and emergency room (ER) visits due to acute respiratory symptoms in children of Delhi. counts ER (ERV) (?15 years) having were obtained from two hospitals Delhi for 21 months. Simultaneously, data on concentrations particulate matter (PM10 PM2.5), nitrogen dioxide (NO2), sulfur (SO2), carbon monoxide (CO), ozone (O3) weather variables provided by Pollution Control Committee. K-means clustering with time-series approach multi-pollutant generalized additive models Poisson link function was used estimate 0–6-day lagged change multiple pollutants levels. Out 1,32,029 screened, 19,120 eligible ?2 weeks residing past 4 enrolled. There a 29% 21% increase ERVs among high moderate level cluster days, respectively, compared low days same day previous 1–6 exposure pollutants. percentage (95% CI) 1.50% (0.76, 2.25) 10 ?g/m3 NO2 1, 46.78% (21.01, 78.05) CO 3, 13.15% (9.95, 16.45) SO2 exposure. An observed after levels