GEOHealth India Hub 
A fully integrated research and training program aiming at air pollution and cardiometabolic diseases with policy relevance to improve health of Indians.
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The GEOHealth study aims to accelerate scientific infrastructure development, enhance capacity, and support research needed to fully characterize the relationship between air pollution and cardio-metabolic (CM) risk factors and diseases in India. The project further aims to build a critical core of environmental health researchers in India that will help develop the evidence base for health-centric policy-making across sectors moving forward.

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Hypertension and Ambient PM 2.5 Pollution in Delhi

  • We found strong effects of long- and short-term exposure on systolic and diastolic blood pressure (BP) as well as risk of developing hypertension.

  • We observed higher average systolic BP (1.8 mm Hg and 3.3 mm Hg per interquartile range differences (~9-15 µg/m3 of PM2.5) in monthly and annual exposures, respectively.

  • Positive but less pronounced associations were observed for diastolic blood pressure.

  • Average PM2.5 over durations of 1 year, 1.5 years, and 2 years increased the risk of developing hypertension by 1.5× (50% higher risk) 1.6× (60% higher risk), and 1.2× (20% higher risk), respectively.

  • These results were also found to be stronger in study participants with higher waist-to-hip ratios, which is an indicator of central obesity.

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