Table 3.

Items collected in the baseline survey questionnaire

Domains (no of questions)	Items
Demographics (4)	Date of birth, gender, name and workplace address
Work history (4)	Job title, specialty, years since beginning work and total duration of work
Work practices (7)	Proportion of interventional procedures for the recent year, working days per month, working hours per week, name of the main procedure performed, badge wearing, wearing of protective equipment and use of shielding devices
Experience of high radiation exposure (2)	Exposure to >5 milliSievert a quarter and low WCC
Personal medical examination (6)	CT scan, fluoroscopy, nuclear medicine imaging, PET-CT scan, interventional radiography and radiation therapy
Lifestyle (2)	Smoking and alcohol consumption
Medical history (9)	Cataract, eye irritation, anaemia, hypertension, dyslipidaemia, cancer, thyroid disease, neck/back pain and skin disease

PET, positron emission tomography; WCC, white cell count.