Numerical Data Interpretation Flashcards

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?

Answer: 120

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

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

Answer: 67%

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

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?

Answer: Treatment A

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

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

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

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

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

Answer: No mode

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

A bar chart shows that Clinic A has 400 appointments per month and Clinic B has 300. If both clinics grow by 20% next year, how many more appointments will Clinic A have than Clinic B after the growth?

Answer: 100

After 20% growth: A = 480, B = 360; difference = 480 − 360 = 120.