Relative odds for the association between left handedness and sex in two national birth cohorts
| Sex | Left handed subjects (%) | Relative odds (95% CI) | Pearson's two tailed p value |
| Male | 1045/8379 (12.5%) | 1.28 (1.17–1.41) | 0.000 |
| Female | 882/8818 (10.0%) | 1.00 |