Community Medicine
Community medicine tests population-level thinking: determinants of health, primary health care, health promotion, equity, community diagnosis and the organisation of preventive services. The exam asks you to move from an individual consultation to a defined population.
Core rules
- Health is shaped by income, education, housing, water, sanitation, nutrition and access, not only health services.
- Primary health care includes equity, community participation, intersectoral action and appropriate technology.
- Community diagnosis uses local data-demography, morbidity, mortality, service use and environmental risks-to set priorities.
- Screening is for asymptomatic people; it is not the same as diagnostic testing.
- Health promotion uses education, policy, environmental change and community engagement, not just leaflets.
- Use crude, age-specific and standardised rates when comparing communities.
Worked example
A primary-care centre notices many young adults with type 2 diabetes. The reasoning: do not stop at individual prescriptions. Audit age, BMI, family history and referral patterns; map food outlets and walking spaces; discuss with community leaders; strengthen opportunistic screening and a group education programme; and re-audit. Include a comparison group or repeat survey. The plan combines clinical care with environmental and social action.
Traps
Confusing incidence with prevalence; blaming patients for structural barriers; launching a screening campaign without follow-up capacity; and ignoring denominator data when reporting clinic figures.