| The former uses weighted average ratios, whilst the latter uses quartiles based on the analysis of 28 ratios. |
| The initial categories were created by stratifying lesions into quartiles according to size. |
| Disparities in college enrollment by family income quartiles are almost as large today as they were thirty years ago. |
| We then divided BC into quartiles according to bimodal BP distribution. |
| To increase the power of the analysis, the entire sample space is split into upper and lower quartiles. |
| Here we would like to estimate the quartiles of the distribution of age at leaving home, within categories of covariates. |
