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Understanding the Fundamentals of Epidemiology an evolving text

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Causative or preventive agents<br />

Scurvy (Ascorbic acid)<br />

Pellagra (Niacin)<br />

Scrotal c<strong>an</strong>cer Benzo(a)pyrene<br />

Smallpox Orthopxovirus<br />

Puerperal fever Streptococcus<br />

Cholera Vibrio cholerae<br />

Bladder c<strong>an</strong>cer a<br />

2-Naththylamine<br />

Yellow fever Flavivirus<br />

Oral c<strong>an</strong>cer b<br />

N-nitrosonomicotine<br />

a<br />

associated with <strong>an</strong>iline dye;<br />

b<br />

associated with tobacco chewing<br />

Source: Wynder EL. Invited commentary: studies <strong>of</strong> mech<strong>an</strong>ism <strong>an</strong>d prevention. Am J<br />

Epidemiol 1994:547-549, Table 1.<br />

The current health pr<strong>of</strong>ile <strong>of</strong> <strong>the</strong> people <strong>of</strong> <strong>the</strong> world as a whole <strong>an</strong>d <strong>of</strong> <strong>the</strong> United States (especially<br />

among minority groups) highlights m<strong>an</strong>y health problems where <strong>the</strong> application <strong>of</strong> existing scientific<br />

<strong>an</strong>d medical knowledge could bring major improvements. It has been argued that nearly half <strong>of</strong><br />

deaths in <strong>the</strong> United States could be prevented by <strong>the</strong> application <strong>of</strong> existing medical knowledge.<br />

Cause<br />

Deaths from Preventable Causes in <strong>the</strong> United States in 1990<br />

Estimated No.<br />

<strong>of</strong> Deaths<br />

Percentage <strong>of</strong><br />

Total Deaths<br />

Tobacco 400,000 19<br />

Dietary factors <strong>an</strong>d activity patterns 300,000 14<br />

Alcohol 100,000 5<br />

Microbial agents 90,000 4<br />

Toxic agents 60,000 3<br />

Firearms 35,000 2<br />

High-risk sexual behavior 30,000 1<br />

Motor vehicle injuries 25,000 1<br />

Illicit use <strong>of</strong> drugs 20,000

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