A descriptive analysis shall compare the characteristics of people who attend CRC screening with those who do not attend. This comparison will include the exposure variables, confounding variables and additional descriptive variables (as detailed in the previous section). Comparisons will be tested for statistical significance, with the caveat that as no specific differences were hypothesised a priori, resulting p-values should be interpreted with caution. T-tests will be used to compare continuous variables, Fisher's exact test will be used to compare binary variables, and the Kruskal-Wallis test will be used to compare ordinal variables. Any p-values less than 5% will be taken to indicate a statistically significant association.