Questionnaires from the original recruitment to our latest follow-up questionnaire can be found below:

The versions of the paper questionnaire used to recruit participants for the pilot study in Lancashire and West Midlands forces, starting in mid-2004.

The versions of the computer-based baseline questionnaire used during onsite clinic screening from mid-2006 onwards.

The versions of the computer-based followup questionnaire used during onsite clinic screening from late-2015 onwards.