Archives: FRCA Part 1

FCA1-0849

A 26-year-old doctor has recently been diagnosed with lung cancer. He would like to find out his survival time for the condition. Which statistical method is used to predict survival rate?

FCA1-0850

A trail has analysed that a new screening test may increase the survival time of ovarian cancer patients. But analyst say that the apparent increase in the patients survival time is just because of earlier detection instead of actual improvement. What kind of bias is in this experiment?

FCA1-0851

A randomized controlled trail has been conducted to compare two drugs used for the early management of acute severe asthma in the emergency department. After being allocated to the randomized groups, many patients have been excluded due to deleterious effect to the drugs. How the data would be analysed?

FCA1-0852

Patient’s having disease (Test Positive: 60, Test Negative:40). Patient’s not having the disease (Test Positive:20, Test Negative: 80). This is a result of a new tumour marker blood test, that was performed on 200 women for breast cancer screening. The director of the screening programme asks you to evaluate the observations and inform them the specificity of this new test. Which one of the following figure you will relay to the programme director?

FCA1-0853

A graph was plotted after administration of fentanyl infusion to a patient. The following are the x- and y-axis of the graph: X-axis: Dose of fentanyl, Y-axis: Mu receptor occupancy, measured using positron emission tomography. Given the data above, what would be the best representation of the graph if the data on the x-axis are converted to logarithms?

FCA1-0854

Which measure of central tendency is most useful for a continuous, non-skewed data?

FCA1-0838

You performed pelvic ultrasound of Mrs Aciman as she had pelvic bloating and intermittent pain. The ultrasound shows a complex ovarian cyst and the radiologist who reported the results has advised urgent consultation with a gynaecologist. Upon breaking the news to Mrs Aciman you learn that she recently had a blood test done that was normal. You explain it to her that the test performed (Ca-125) is not always perfect and is only able to detect 80% of the cancer cases while the remaining 20% go undetected. Which statistical term appropriately explains the 80% in this example.

FCA1-0841

What is the percentage of values that lie within 3 standard deviations of the mean?

FCA1-0842

In a study lasting over a period of two years, in which the mean age of 800 patients was 82 years, the efficacy of hip protectors in reducing femoral neck fractures was discussed. Both experimental and control group had 400 members. Instances of fractures reported over the two year time duration were 10 for the control group (that were prescribed hip protector) and 20 for the control group. What is the value of Absolute Risk Reduction?