The Population Attributable Risk Percent (PAR%) for smoking in lung cancer is 80%. The most accurate interpretation is:
- A 80% of smokers will develop lung cancer
- B Eliminating smoking would reduce lung cancer incidence by 80% in the population ✓
- C 80% of the exposed group's excess risk is due to smoking
- D The relative risk of lung cancer in smokers is 80 times that in non-smokers
Correct answer: B. Eliminating smoking would reduce lung cancer incidence by 80% in the population
Explanation
PAR% = (Total incidence − Incidence in unexposed) / Total incidence × 100. It estimates the proportion of disease in the total population attributable to a given exposure — i.e., the percentage reduction in disease incidence expected if the exposure were completely eliminated from the population, assuming causality. Option C describes Attributable Risk Percent in the exposed.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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