UCAT Numerical Data Interpretation 3

Question 1

A hospital runs 4 operating theatres. Data shows each theatre performs an average of 6 procedures per day. Over a 5-day week, how many procedures are performed in total?

Accepted Answer

120

Answer

4 theatres × 6 procedures/day × 5 days = 120 procedures per week.

Question 2

Patient data shows that 180 patients were screened, 45 tested positive, and 30 were true positives. What is the positive predictive value (PPV)?

Accepted Answer

67%

Answer

PPV = true positives / total positives = 30 / 45 ≈ 66.7%, approximately 67%.

Question 3

A cost-effectiveness analysis shows Treatment A costs $5,000 per quality-adjusted life year (QALY) and Treatment B costs $8,000 per QALY. If a health authority can fund only one, which is more cost-effective?

Accepted Answer

Treatment A

Answer

Treatment A at $5,000 per QALY is more cost-effective because it achieves each QALY at a lower cost.

Question 4

A study reports a relative risk (RR) of 0.6 for a new vaccine. What does this mean?

Accepted Answer

Vaccinated people have 40% less risk of disease compared to unvaccinated

Answer

An RR of 0.6 means vaccinated people have 60% of the risk of unvaccinated people, i.e. a 40% reduction in risk.

Question 5

A table shows hospital staff absences per month: Jan 50, Feb 45, Mar 60, Apr 55, May 40. What is the mode?

Accepted Answer

No mode

Answer

Each value appears only once in the dataset, so there is no mode.

UCAT University Clinical Aptitude Test Practice Practice Test

UCAT University Clinical Aptitude Test Practice Practice Test

UCAT Numerical Data Interpretation 3