This Research Insights highlights the self-reported impact of chronic health on two key measures of “knowledge worker” performance – capability and concentration – to demonstrate how quantifying health-related job performance can be integral in making the business case for white-collar workforce health investments.This Research Insights highlights the self-reported impact of chronic health on two key measures of “knowledge worker” performance – capability and concentration – to demonstrate how quantifying health-related job performance can be integral in making the business case for white-collar workforce health investments.