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HP3 Quiz 2 Practice

11

Incidence, Prevalence, Risk and Causation

Which of the following is evidence that an association is cause-and- effect?


12

Disease X has an incidence rate of 0.2% per annum. Its population prevalence is 1%. Disease X is likely to be:


13

The following information relates to questions 13 to 15 inclusive. The incidence rate of lung cancer in Victorian smokers is 0.3% per annum, while the incidence rate of lung cancer in Victorian nonsmokers is 0.014% per annum. In Victoria, the risk of lung cancer attributable to smoking is:


14

In Victoria, the risk of lung cancer in smokers relative to nonsmokers is:


15

Assuming the absolute annual risk of lung cancer in Victorian smokers remains constant over time, what is the absolute risk of lung cancer in a Victorian after 10 years of smoking?


16

Association / correlation

The following information and Figure 6 relate to question 16.

Low-density lipoprotein cholesterol (LDL-C) and triglyceride (TG) level were measured in 100 patients with ischemic heart disease. For each patient the LDL-C level was plotted against TG level in a scatter plot.

Figure 6 - scatter plot of LDL-C level versus TG level for 100 patients. r denotes Pearson’s correlation coefficient:



Regarding the information presented in Figure 6, which of the following statements is correct?


17

Types of Variables and Univariate Analysis

The following information and Table 1 relate to questions 17 to 20 inclusive.

In a case control study, a team of investigators sought to compare the demographic and cardiovascular risk profile of patients with and without coronary artery disease (CAD). Univariate comparisons are presented in Table 1.

Table 1 - Univariate comparison of characteristics in patients with and without coronary artery disease (CAD):



What type of variable is ‘age’?


18

What type of variable is ‘sex’?


19

What type of variable is ‘race’?


20

With regards Table 1, which of the following statements is/are correct?