Ask what the measure can mean
Start with population and time. Then distinguish frequency, association and causation; ask whether selection, information or confounding could alter the observed relationship.
EPIDEMIOLOGY · SCREENING · SYSTEMS
From numbers
to people.
Use these loops to connect measures, study design, screening and health systems. They prepare an exam framework; they never replace current public-health directions.
Follow the pathway, not a single test
Frame the target condition, intended population, test performance, confirmatory route, benefit–harm balance and ability to follow through after a result.
Translate before calculating
Name the data type, comparison and uncertainty. Treat a statistic as an answer to a stated question—not proof detached from its design and context.
Make the delivery chain visible
Connect community need, access, workforce, supply, referral, continuity and equity. A programme is useful only through its real delivery pathway.
ACTIVE RECALL
Can you state the denominator, design and next link in the chain?
Write the answer first. Then use dated, official sources to verify local programmes, notification duties, schedules and current statistics.
One scenario, four lenses
For any population-health question, identify the measure, likely bias, prevention or screening pathway and the system condition needed for follow-through.
Keep local facts current
Do not rely on static notes for public-health policy, reporting, thresholds, schedules or operational guidance. Check the relevant current official authority.