BACKGROUND As the definitional formula for population attributable fraction is not usually directly usable in applications, separate estimation formulas are required. However, most epidemiology textbooks limit their coverage to Levin's formula, based on the (dichotomous) distribution of the exposure of interest in the population. Few present or explain Miettinen's formula, based on the distribu...

The PAF of occupational COPD among Danish women http://ow.ly/CEmy308XEgl.

Unfortunately, we got the wrong answer. The correct answer is 21%; we over-estimated the PAF by nearly 30%. What did we do wrong? We followed a wellestablished, but incorrect, tradition of putting adjusted RRs in the crude (unadjusted) PAF formula. The crude formula is only appropriate when the impact of exposure (i.e. ‡ 5 kg gain) on the development of disease (i.e. diabetes) is not confounded...

Compares the use of relative risk versus population attributable fraction in determining the target population for multirisk prevention programs in psychology. Results show that relative risk generally increases as a function of cumulative risk. Guided by this measure, prevention programs should target populations with the largest cumulative risk. However, relative risk does not account for the...