Self-reported numeracy was a strong predictor of accuracy of responses ( odds ratio -LSB- OR -RSB- = @ , P = @ ) , and the impact of high numeracy varied across graphical type , having a greater impact on line ( OR = @ ; @ % confidence interval -LSB- CI -RSB- = @-@ ; P = @ ) and pie charts ( OR = @ ; @ % CI = @-@ ; P = @ ) , without an impact on pictographs ( OR = @ ; @ % CI = @-@ @ ; P = @ ) or bar charts ( OR = @ ; @ % CI = @-@ @ ; P = @ ) .