UCAT Quantitative Reasoning 5

Question 1

A confidence interval for a treatment effect is 1.2 to 3.8 (relative risk). What does this indicate?

Accepted Answer

The treatment significantly increases risk — the interval excludes 1

Answer

The treatment has no effect

Answer

The result is not statistically significant

Answer

The treatment reduces risk

Question 2

A hospital reduces average length of stay from 6 days to 4.5 days. By what percentage was it reduced?

Accepted Answer

25%

Answer

33%

Answer

15%

Answer

20%

Question 3

Two drugs: Drug X reduces systolic BP by 12 mmHg (SD 4), Drug Y by 10 mmHg (SD 8). Which has more consistent effects?

Accepted Answer

Drug X — smaller standard deviation relative to effect

Answer

Drug Y — larger absolute reduction

Answer

Both are equally consistent

Answer

Consistency cannot be compared

Question 4

Prevalence of diabetes in UK = 6%. In a GP practice of 2,500 patients, how many are expected to have diabetes?

Accepted Answer

150

Answer

250

Answer

60

Answer

600

Question 5

A line graph shows weight loss over 12 weeks. Weeks 1–4: steep decline. Weeks 5–8: plateau. Weeks 9–12: gradual decline. At which point is the rate of loss greatest?

Accepted Answer

Weeks 1–4

Answer

Weeks 5–8

Answer

Weeks 9–12

Answer

Cannot tell from a line graph

Question 6

A clinical audit finds: Compliance rate = 73%. Target = 90%. In a sample of 400 procedures, how many must improve to reach the target?

Accepted Answer

68

Answer

17

Answer

108

Answer

72

A confidence interval for a treatment effect is 1.2 to 3.8 (relative risk).What does this indicate?

A confidence interval for a treatment effect is 1.2 to 3.8 (relative risk).
What does this indicate?