Which factors listed below are non-causal and may distort observed findings in a health study?

Sort the risk management approaches by their degree of population protection

An epidemiologist is studying the effects of heat waves and ozone pollution on hospital admissions for respiratory illness. They present the following stratified data, where the odds ratio (OR) for respiratory illness associated with high ozone exposure is calculated for both days with and without a heat wave. Based on these results, what is the best description of the relationship between heat waves and ozone exposure?

Define random error and systematic error (minimum 2 sentences), and provide examples of: one strategy/approach to reduce random error (minimum 1-2 sentences) in an air pollution and health study one strategy/approach to reduce systematic error (minimum 1-2 sentences) in an air pollution and health study

Categorize the sources as stationary or mobile.

Based on the figure, what is the prevalence of disease on April 1, 2005?

Sort the particles by total surface area per mass

A large, prospective cohort study tracks a population over 20 years to investigate the link between long-term exposure to fine particulate matter (PM2.5) and the incidence of chronic obstructive pulmonary disease (COPD). The study produces the following findings: Compared to individuals in the lowest category of PM2.5 exposure, those in the highest category have a threefold higher risk of developing COPD. The risk of COPD increases steadily and progressively with each higher category of PM2.5 exposure. Which of the Bradford Hill criteria for causality is best illustrated by the second finding, and why?

In your view, has the Clean Air Act been a success or not? Explain your reasoning. (3 sentences minimum)

An epidemiologist is analyzing asthma case data for three states and find these results: State A: Population of 5 million, with an asthma rate of 8 per 1,000 people. State B: Population of 2 million, with an asthma rate of 12 per 1,000 people. State C: Population of 1 million, with an asthma rate of 10 per 1,000 people. What is the overall weighted average asthma rate (per 1,000 people) across all three states? (select one) What is the correct term to describe this rate?