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A population of 160 healthy firemen was followed for development of COPD. After being followed for 5 years 15 developed COPD. Twenty firemen were followed for 2 years and they left for other jobs. The remaining who never developed COPD were followed for 10 years.
a. Calculate the number of person years of observation accrued by the population
b. Calculate the Incidence rate of COPD amongst firemen.
Hospital managers are concerned that some patients with medical emergencies wait too long in the casualty department before they are diagnosed and treated. During a meeting, two groups of proposals have appeared:
The River City Fire Department (RCFD) fights fires and provides a variety of rescue operations in the River City metropolitan area. The RCFD staffs 13 ladder companies, 26 pumper companies, and several rescue units and ambulances. Normal staffing req..
Define and describe the types of validity. Provide examples of these types of validity as they apply to human services research or to human services management research.
How might parents encourage language development during infancy? How might parents hinder language development?
In what ways have various forms of entertainment media shaped American culture and its values? Are the social influences of entertainment media mostly positive or negative? Explain.
What is the Commercial and economic development of the West following the Civil War in the Businesses in the subregions
You want a sales compensation plan that is simple to administrate, controls sales costs, and encourages salespeople to be entrepreneurial. Your best choice of compensation plan would be a:
Search the internet on schizophrenia. Comment on your discoveries regarding this complex set of illnesses from several aspects, but include some comment on the most recent research on the nutritional causes and/or interventions you may have found.
You are the executive director of an established not-for-profit, community-based organization provider that offers high-quality educational, vocational, and training services to various segments of the local population.
How does a nurse know what (if any) knowledge in a research study is useable for clinical practice? What would a critical thinker look for in the evidence before deciding to change?
The reason that people act strongly is that they understand dimly; the blaze of understanding scatters energy.
Liquid water is not stable on Mars' surface because the thick carbon dioxide atmosphere produces very high temperatures. Since gases are drawn inward by the gravitational pull of the sun, the inner planets all have atmospheres.
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