HPCSA Board Exam Measures of Risk — practice questions
44 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice HPCSA Board Exam Measures of Risk in the app →What distinguishes a ratio from a proportion?Among men in a follow-up study, 3,151 were nondiabetic and 189 were diabetic. What is the ratio of nondiabeticDelaware's infant mortality rate in 2001 was 10.7 per 1,000 live births and New Hampshire's was 3.8 per 1,000.In 2002 the United States reported 15,075 new tuberculosis cases and 802 tuberculosis deaths. What is the deatA follow-up study recorded 1,494 deaths in all, of which 911 occurred among men. What proportion of the deathsWhich fraction qualifies as a proportion?Why does proportionate mortality fail to qualify as a mortality rate?How is morbidity defined?A varicella outbreak ran through a boarding school from September to December. Which denominator gives the risAt a corporate picnic, 99 people ate potato salad and 30 of them developed gastroenteritis. What is the food-sEighteen primary shigellosis cases arose in 18 households holding 86 people in all, and 17 contacts later fellA cohort produced 16 new cases of heart disease over 6,400 person-years of observation. What is the incidence Under the half-year convention, how much disease-free follow-up does a participant diagnosed during year 3 conObservation of a cohort participant stops at one of four end points. Which event is not one of them?Which assumption weakens person-time denominators in studies of chronic disease?In 2003 there were 44,232 new AIDS cases in a mid-year population of 290,809,777. What is the incidence rate pPrevalence and incidence differ chiefly in which part of the fraction?A disease shows high prevalence yet low incidence. What best explains this?Of 1,150 women surveyed in Maine, 468 reported frequent multivitamin use before pregnancy. What is the prevaleThe United States recorded 2,419,921 deaths in 2003 in a population of 290,809,777. What is the crude mortalitWhich mortality rate divides by the estimated total mid-year population?The neonatal mortality rate counts deaths among children of which age?Which denominator and multiplier does the maternal mortality rate use?Why is the infant mortality rate a ratio but not a proportion?Community A has the higher crude mortality rate but the lower age-adjusted rate. What does that indicate?Alaska's 2002 crude mortality rate was 472.2 per 100,000 against Florida's 1,005.7, yet Alaska's age-adjusted A hepatitis A epidemic produced 555 cases and 3 of the case-patients died. What is the case-fatality rate?What separates the case-fatality rate from the death-to-case ratio?Why can a proportionate mortality ratio mislead when a workforce is compared with the general population?Which two end points are most commonly used for years of potential life lost?Leukemia killed 125 children in the age group whose midpoint is 2.5 years. Using an end point of 65 years, whaLeukemia accounted for 117,033 years of potential life lost among 252,755,000 people under age 65. What is theA table lists only deaths by age group for two causes, with no population figures and no all-cause total. WhicIn a prison outbreak, 28 of 157 East wing inmates and 4 of 137 West wing inmates developed tuberculosis. What A risk ratio of 0.28 for vaccinated against unvaccinated children means what?In the prison outbreak 28 East wing inmates fell ill and 129 stayed well, while 4 West wing inmates fell ill aIn a case-control study, 32 of 40 case-patients and 20 of 80 controls had stored maize indoors. What is the odWhy is the odds ratio the measure of choice in a case-control study?Infirmary visits for acute respiratory illness ran at 11.6 per 1,000 tourists per week in 1998 against 5.3 in Lung cancer mortality was 0.57 per 1,000 per year among light smokers and 0.07 among nonsmokers. What is the aAt a wedding, 50 of 53 cake eaters and 4 of 26 non-eaters fell ill. What share of illness among cake eaters isWhat distinguishes vaccine efficacy from vaccine effectiveness?Varicella struck 11.8% of vaccinated children and 42.9% of unvaccinated children. What is the vaccine effectivAmong wedding guests, 50 of the 53 who ate cake became ill. What does the fraction 50 over 53 represent?