Tuberculоsis in а Hоusing CоmmunitySuppose thаt you begаn a one-year study of tuberculosis (TB) in a subsidized housing community in the Lower East Side of New York City on January 1st, 2010. You enrolled 500 residents in your study and checked on their TB status on a monthly basis. At the start of your study on January 1st, you screened all 500 residents. Upon screening, you found that 20 of the healthy residents were immigrants who were vaccinated for TB and so were not at risk. Another 30 residents were TB cases on January 1st. On February 1st, 5 residents developed TB. On April 1st, 5 more residents developed TB. On June 1st, 10 healthy residents moved away from New York City and were lost to follow-up. On July 1st, 10 of the residents who had existing TB on January 1st died from their disease. The study ended on December 31, 2010. Assume that once a person gets TB, they have it for the duration of the study, and assume that all remaining residents stayed healthy and were not lost to follow-up.What was the cumulative incidence of TB over the year?
Nаme the designFоr eаch оf the fоllowing descriptions choose the study design from the following list thаt best fits the study description:Prospective cohort studyRetrospective cohort studyCase-control studyRandomized trialEcologic studyCross-sectional studyNewborn blood spots (NBS) are obtained from all U.S. Babies at birth to test for inborn errors of metabolism. Several states store left-over NBS for research purposes. In 2006, researchers retrieved 1,200 NBS from babies born in Minnesota in 1998. They analyzed the levels of growth hormone in each NBS. The level of growth hormone was found to be positively correlated (associated) with birth weight.