<prompt> In a village of 1 lakh population, among 2,000 exposed to smoking, 20 developed lung cancer and among 8,000 unexposed people, 8 developed lung cancer. What is attributable risk-105090100  <response>: This is a coho study. Attributable risk incidence in exposed -incidence in nonexposed incidence in exposed 100 Incidence in exposed202000 Incidence in nonexposed88000 Attributable risk0.01-0.001.01100 90 90 of lung cancer among smokers can be attributed to their smoking Ref: Parks textbook of preventive and social medicine, 23rd Edition Pg no: 78 