1) It refers to the secular change of disease frequency in a group as influenced by membership in that particular group. a) Cohort effect b) Competing risk c) person time d) exponential decay 2) When conducting a cohort study, exposure is measured... a) at the start of the study b) at follow up c) after the outcome was measured 3) Population in which the person-time experience can accrue from a changing roster of individuals a) Closed population b) Open Population  4) Incidence rate may be estimated directly. a) False b) True 5) What are the measures that could be estimated in a cohort study? SELECT ALL THAT APPLY. a) incidence density rate b) average risk c) ratio measures d) difference measures e) measures of potential impact 6) Incidence proportion can still be estimated directly even when there are competing risks. a) False b) True  7) What are the basic requirements for cohort membership? a) must free of the disease at the outset of follow-up b) must be alive at the start of follow up c) must already have the disease of interest at the start of the study 8) What is the difference between incide a) Incidence proportion is the probability of developing the disease during the study period, while incidence rate is frequency of occurrence of disease per unit time relative to the size of the population at risk b) Incidence proportion is the frequency of occurrence of disease per unit time relative to the size of the population at risk, while incidence rate is the probability of developing the disease during the study period 9) This is set up for a) Closed population b) Open population  10) This is set up for  a) Open population b) Closed population 11) Measure of the amount of disease or death that could be attributed to the exposure a) Population Attributable Risk (PAR) b) Attributable Fraction among Exposed (AFE) 12) This formula is for the computation of a) PAR b) AFE 13) This formula is for the computation of a) PAR b) AFE 14) What type of study design is a cohort study? a) Longitudinal b) Cross-sectional c) Case-control d) Randomized controlled trial 15) What is the primary purpose of a cohort study? a) To identify risk factors for a disease or condition b) To compare the effectiveness of different treatments c) To estimate the prevalence of a disease or condition d) To identify the cause of a disease or condition 16) How are individuals selected for a cohort study? a) Randomly b) Based on their medical history c) Based on their exposure to a specific risk factor d) Based on their willingness to participate

Cohort Study

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