Are age-specific mortality rates valid for comparing populations?
Age-specific mortality rates are narrowly defined (in this fraction, limited to 10 years of age), so are generally valid for comparing two populations without any adjustment. C. Vaccine efficacy measures the proportionate reduction in disease among vaccinees.
What percentage of hospital patients have Medicare insurance (m)?
Given the contingency table shown here, find P (A1 or B2). At Dolon General Hospital, 30 percent of the patients have Medicare insurance (M) while 70 percent do not have Medicare insurance (M´). Twenty percent of the Medicare patients arrive by ambulance, compared with 10 percent of the non-Medicare patients.
Are major neurocognitive disorder rates increasing as people live longer?
Major neurocognitive disorder rates are increasing as people live longer. Which of the following statements about major neurocognitive disorder is FALSE? a. Globally, one new case of major neurocognitive disorder is identified every 30 seconds.
Is it safe to operate on one patient in the old way?
One patient was operated upon in the old way, and the other in the new way. Both procedures are considered equally safe. The surgery times are shown below: Which test should we use to test for zero difference in mean times?
How long does immunotherapy last?
Immunotherapy improves five-year survival rate of people with advanced lung cancer. June 3, 2019.
Where was the first study to evaluate pembrolizumab as a treatment for lung cancer?
The study, conducted at UCLA and more than 30 other centers , was the first to evaluate pembrolizumab as a treatment for lung cancer. Credit: Shutterstock
What is the best measure of association to use when calculating incidence proportions?
When incidence proportions (risks) can be calculated, the best measure of association to use is the ratio of incidence proportions (risks), i.e., risk ratio.
Why is the fraction of mortality not a proportion?
A, D. All fractions are ratios. This fraction is not a proportion, because some of the deaths occurred before July 1, so those women are not included in the calculation.
Why is lung cancer not a proportion?
This fraction is not a proportion, because lung cancer deaths in the numerator are not included in the denominator. It is not an incidence proportion, because the denominator is not the size of the population at the start of the period. It is not a mortality rate because the denominator is not the estimated midpoint population.
What is the difference between incidence and risk ratio?
Incidence reflects new cases only; incidence proportion is a measure of risk. A risk ratio is simply the ratio of two incidence proportions. Prevalence reflects existing cases at a given point or period of time, so one does not need to know the date of onset.
What does the age adjusted mortality rate mean?
The crude mortality rate reflects the mortality experience and the age distribution of a community, whereas the age-adjusted mortality rate eliminates any differences in the age distribution. So if Community A’s age-adjusted mortality rate was lower than its crude rate, that indicates that its population is older.
How many cases of a syphilis in July?
D. A total of 8 cases are present at some time during the month of July.
What are frequency measures of health and disease?
A, B, C, D. Frequency measures of health and disease include those related to birth, death, and morbidity (incidence and prevalence).