Additional file 3.

Table S3. Numeracy scores for each demographic sub-group. Mean ± standard deviation is shown for each sub-group. Scores between subgroups were compared using non-parametric methods, but means are presented because median scores did not show differences between sub-groups. The effect of gender and educational attainment was significant for both scales (Mann–Whitney's test, effect of gender, Schwartz-J, Z=2.6, p<0.01; Lipkus-J9, Z=2.6, p<0.01; effect of education, Schwartz-J, Z=2.0, p<0.05; Lipkus-J9, Z=2.3, p<0.05). The effect of age was significant only for Schwartz-J, where post hoc analysis revealed that the 40-49 year old group performed significantly better than the 60-69 year old group (Mann-Whitney's test, Z=2.9, p<0.05, Bonferroni corrected).

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Okamoto et al. BMC Medical Informatics and Decision Making 2012 12:104   doi:10.1186/1472-6947-12-104