The survey consisted of a CAPI questionnaire and 2 paper self-completions

Main Interview

The CAPI interview used in the main survey included the following elements.

  • Vision: measures of near vision in right and left eyes (using appropriate visual correction), with and without pinhole viewer; stereo vision; distance vision (using appropriate visual correction).
  • Blood pressure and pulse: three measures of systolic and diastolic blood pressure and resting pulse.
  • Prescription drugs: all prescribed drugs taken, by name and BNF code.
  • Hearing: thresholds of hearing in right and left ears at 1kHz and 4kHz.
  • Standing height, sitting height, weight, waist circumference, hip circumference.
  • Lung function: three measures (from up to five attempts) of forced vital capacity (FVC), forced expiratory volume (FEV1) and peak flow (PF).
  • Eye measurements using autorefractor: sphere, cylinder and axis of right and left eyes.
  • Non-fasting blood sample: four tubes filled and sent by nurses to laboratories in London, Newcastle and Bristol.
  • (CASI): AUDIT and supplementary questions about drinking alcohol; adverse childhood experiences.
  • CIS-R interview: modules covering appetite, fatigue, concentration and forgetfulness, sleep problems, irritability, depression, depressive ideas, anxiety, phobias, and panic.

Questionnaire 1 (completed in advance)

  • sun exposure
  • physical activity connected with work
  • hearing
  • eyesight
  • pain
  • working conditions
  • household circumstances
  • social support.

Questionnaire 2 (completed during the interview)

  • general health and diet
  • leisure exercise
  • employment
  • partnership status and children
  • life events and
  • (women only) contraception and HRT.

Documentation for the above is available to download from this page.

Written consents were collected for:

  • all measurements;
  • questions about psychological health;
  • collection, testing, storage and future use of blood;
  • feedback of blood test results to the cohort member;
  • feedback of measurements and results to the cohort member’s GP;
  • analysis, storage and future use of saliva;
  • deposit of data in the ESRC data archive;
  • use of NHS administrative data.

Cohort members were asked to collect and return two samples of saliva, accompanied by a short self-completion questionnaire

Appendix B of the Technical Report includes information about the equipment used and nurse protocols.

Consent booklets and saliva forms can be found with other survey documents in Appendix C of the Technical Report.