Preventive medicine, epidemiology and Gulf public health is 5% of our bank, 7 to 8 items on a 150-item paper. It is the most arithmetic domain: sensitivity, predictive values, relative risk, NNT and study design, plus screening principles and notifiable disease. Gulf content covers zoonoses (MERS-CoV, brucellosis), consanguinity-linked screening and heat. We could not verify the UAE national immunisation ages, screening start ages, current prevalence figures or Hajj vaccination rules, so this page does not teach them. Qatar DHP lists a preventive medicine textbook and the USPSTF guide in its references.
Weight and where it sits
The SMLE blueprint lists "patient safety, preventive medicine and ethics" as a fifth block with no stated percentage, and DHP names preventive references without an item count. Our bank gives preventive and public health 5%, about 7 to 8 items, and ethics and safety another 5%. The two domains support each other, and the marks are cheap if you revise them in short, regular sessions.
What is tested
| Cluster | Subtopics |
|---|---|
| Prevention and screening | Levels of prevention, screening principles (Wilson-Jungner), cancer screening (breast, cervical, colorectal), consanguinity, premarital and newborn screening for inherited disease |
| Infection control and outbreaks | Notifiable disease reporting and outbreak investigation, adult immunisation, travel health and Hajj or Umrah vaccination, healthcare-associated infection prevention |
| Epidemiology and statistics | Measures of disease frequency and association, study design, bias and confounding, diagnostic test performance, interpretation of confidence intervals, p values and NNT |
| Lifestyle and environment | Tobacco, vaping, obesity and physical inactivity, occupational and heat-related health in Gulf summers |
| Gulf public health | Zoonoses (MERS-CoV, brucellosis, camel and livestock exposure), health system and primary healthcare organisation in the region |
The formulas, once
These definitions never change, and a fixed layout makes them quick to apply under time pressure.
| Measure | Definition |
|---|---|
| Sensitivity | True positives divided by all with the disease (TP / (TP + FN)) |
| Specificity | True negatives divided by all without the disease (TN / (TN + FP)) |
| Positive predictive value | True positives divided by all positive tests (TP / (TP + FP)); rises with prevalence |
| Negative predictive value | True negatives divided by all negative tests (TN / (TN + FN)); falls as prevalence rises |
| Relative risk | Risk in the exposed divided by risk in the unexposed |
| Absolute risk reduction | Control event rate minus treated event rate |
| Number needed to treat | One divided by the absolute risk reduction |
| Odds ratio | Odds of exposure in cases divided by odds of exposure in controls |
Gulf public health: what we can state
- MERS-CoV. Dromedary camels are the primary reservoir; transmission to humans is by direct contact with dromedaries or raw camel products; spread between people is mostly in households and health-care settings; there is no licensed vaccine or specific treatment; cases are reported to WHO under the International Health Regulations.
- Brucellosis. Acquired through unpasteurised milk or cheese from infected goats or sheep, or contact with animal blood, placenta or uterine secretions. Counselling for people with camel and livestock exposure is to avoid raw camel milk, use pasteurised dairy, wash hands and use PPE when handling animals.
- Consanguinity and carrier screening. Premarital carrier screening for recessive disease such as thalassaemia and sickle cell disease is a legitimate concept. We have not verified the current legal scope, test panel or instrument, so no stem should hinge on them.
- Heat. The UAE's midday break for outdoor work was reported for 2025 as a ban on work in direct sun from 12:30 to 15:00 between 15 June and 15 September, with employers required to provide shade, cooling, drinking water and first aid. It is reported to be reconfirmed each year, so treat it as context for heat illness, not as a number to memorise.
- Cervical screening. WHO recommends HPV DNA testing from age 30 in the general population at 5 to 10-year intervals, and from age 25 in women living with HIV. Breast and colorectal screening ages are not stated in our verified sources; answer from the guideline named in the stem.
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What we do not teach as fact
Four items are common in prep material and are not in our verified sources: the UAE national childhood immunisation ages, the UAE breast, cervical and colorectal screening start ages and intervals, current prevalence figures for G6PD deficiency, thalassaemia, sickle trait and vitamin D deficiency, and the 2026 Hajj and Umrah vaccination certificate rules. MenACWY is routinely associated with Hajj, but the 2026 notice was not retrieved, so check the Saudi Ministry of Health. For immunisation, use WHO schedule logic: live vaccines and contraindications, catch-up principles and the interval rules.
Three typical traps
- Predictive values and prevalence. A test with the same sensitivity and specificity has a lower positive predictive value in a low-prevalence population. A stem that changes the population is testing exactly this.
- Relative versus absolute risk. A large relative risk reduction can be a small absolute one, and NNT follows the absolute figure. Read which measure the stem asks for.
- Screening versus diagnosis. A screening test finds people who need a diagnostic test. Stems that treat a positive screen as a diagnosis, or that ignore lead-time and overdiagnosis, are the trap.
How to revise it
- Work three statistics sets by hand, without a calculator where possible, until a two-by-two table feels automatic.
- Learn study designs by their question: what design answers prevalence, cause, treatment effect, prognosis.
- Memorise the screening principles as a short list and apply them to a new test.
- Read the WHO MERS-CoV and brucellosis fact sheets once, then revise from your notes.
- Do a short set weekly through the plan. This domain decays fast because it is rarely used in daily work.
Related: infectious disease and haematology, ethics and safety and high-yield topics.
Frequently asked questions
How many preventive medicine questions are there?
Our bank gives it 5%, about 7 to 8 items on a 150-item paper. The SMLE lists a fifth block of patient safety, preventive medicine and ethics with no stated percentage.
Do I need to learn UAE vaccination ages?
We could not verify them from sources we could retrieve, so we do not teach them as facts. Use WHO schedule logic.
Are statistics questions calculator-based?
We cannot say what each regulator allows. Practise the arithmetic by hand so you are comfortable either way.
What public health topics are Gulf-specific?
Zoonoses such as MERS-CoV and brucellosis, consanguinity and carrier screening, heat-related illness, and Hajj-related travel health.
Is the midday break rule worth memorising?
No. It is reported to be reconfirmed each year. Learn the clinical features of heat illness and the principle of prevention.