. Author manuscript; available in PMC: 2013 Jul 13.

Published in final edited form as: Asia Pac J Public Health. 2012 Jan 13;27(2):NP194–NP202. doi: 10.1177/1010539511433049

Table 4. Population Attributable Fractions (PAF) by selected health outcomes.

Types of vision impairment	PAF (%) by health outcomes
Types of vision impairment	Poor self-assessed health	Poor psychological health	Overall injuries	Falls

Refractive errors	6.1	3.5	0.3	2.2
Not correctable by any visual aids	7.5	4.7	3.2	3.1

PAF estimates the proportion of the disease or condition that would not occur if no one in the population had the risk factor. For example, 6.1% of poor self-assessed health noted in the cohort would not occur if there were no refractive errors in the population.