Scenario 1: In your new job on the evaluation team at the Global Alliance for Clean Cook Stoves (funded by the United Nations Foundation), you've been asked to determine the prevalence and incidence of high blood pressure among household cooks who use traditional cook stoves living in rural Karnataka India.Your field team is actively recruiting participants for a two-year study. As part of study enrollment, they measured blood pressure in 166 primary household cooks. 43 of them have high blood pressure at enrollment.

Scenario 2: Once enrollment was complete, the field team then followed the primary cooks without high blood pressure for 2 years, and their blood pressure is measured every 6 months. All of these cooks used traditional cook stoves. During this time, 33 cooks and their families moved to a different village and were lost to follow up. Among those who remained in the study village, 15 primary cooks developed high blood pressure over the course of the study.

I3. Calculate the risk (including those lost to follow up) among cooks exposed to traditional cook stoves and interpret the risk of high blood pressure in your study sample in one sentence. Show your calculations and round to a whole number. Sometimes investigators calculate a risk using all those at risk at baseline (regardless of who dropped out.)