Introduction to Epidemiology 6th Edition by Ray M Merrill

Exercise 5

Refer to Figure 1. What are some possible explanations for the observed birth cohort effect among those who died at ages 20–24?

Figure 1 Death rates from homicide and legal intervention for black males in the United States by selected birth cohorts. Data source: Surveillance Research Program, National Cancer Institute. SEER*Stat software version 6.4.4. Available at: http://www.seer.cancer.gov/seerstat. Accessed January 10, 2012.

Step 1 of 2

Comparison between the cohorts of 1970 to 1974, 1980 to 1984 as well as 1975 to 1979 the death rate is higher inside the age group of fifteen to nineteen years. The period effect includes a change or shift within the trends in rate, which affects all of the age cohorts as well as birth cohorts.

This phenomenon’s is in response to the phenomenon that occurs at certain time across overall population. A period may be the outcome of introduction of new antibiotics and vaccines. It may be the outcome of adverse stress of physical stress as well as social conditions like flood, war, earthquake, terrorism as well as economic collapse.