Objective
To investigate the relationship between literacy and numeracy and their
association with health task performance.
Methods
Older adults (n=304) completed commonly used measures of literacy and
numeracy. Single factor literacy and numeracy scores were calculated and used to predict
performance on an established set of health self-management tasks, including: i)
responding to spoken information; ii) comprehension of print and iii) multimedia
information; and iv) organizing and dosing medication. Total and sub-scale scores were
calculated.
Results
Literacy and numeracy measures were highly correlated (rs=0.68;
ps<.001). In multivariable models adjusted for age, gender, race, education, and
comorbidity, lower literacy (β=0.44, p<.001) and numeracy
(β=0.44, p<.001) were independently associated with worse overall
task performance and all sub-scales (literacy range,
β=0.23–0.45, ps<.001; numeracy range,
β=0.31–0.41, ps<.001). Multivariable analyses with both
constructs entered explained more variance in overall health task
performance compared with separate literacy and numeracy models (8.2% and
10% respectively, ps<.001).
Conclusion
Literacy and numeracy were highly correlated, but independent predictors of
health task performance. These skill sets are complementary and both are
important for health self-management.
Practice Implications
Self-management interventions may be more effective if they consider both
literacy and numeracy skills rather than focusing on one specific ability.