- Additional descriptive variables. The following variables will not be used within the statistical models, but shall be included when performing a descriptive comparison of individuals who do attend screening with those who do not attend screening: self-reported EQ-5D summary score, self-reported healthcare use in the last 3 months (this includes 22 named categories, it is anticipated that due to small numbers some of these will need to be grouped. Possible groupings to consider are: Accident and emergency (A&E), Hospital use (excluding A&E), Health-carer: GP, Health-carer: Nurse, Other health-carers, Other carers, Alternative therapists.