Table A1.

EPIC Physical Activity Questions from which the Total Physical Activity Score was derived.

1	We would like to know the type and amount of physical activity involved in your work. Please tick what best corresponds to your present activities from the following four possibilities.
	___ Sedentary occupation	You spend most of your time sitting (such as in an office).
	___ Standing occupation	You spend most of your time standing or walking. However, your work does not require intense physical efforts (e.g., shop assistant, hairdresser, guard).
	___ Physical work	This involves some physical effort including handling of heavy objects and use of tools (e.g., plumber, cleaner, nurse, sports instructor, electrician, carpenter).
	___ Heavy manual work	This involves very vigorous physical activity including handling of very heavy objects (e.g., docker, miner, bricklayer, construction worker).
2	In a typical week during the past 12 months, how many hours did you spend on each of the following activities? (Put ‘0’ if none.) Cycling, including cycling to work and during leisure time
	In summer ____ hours per week
	In winter ____ hours per week
	Other physical exercise such as keep fit, aerobics, swimming, jogging
	In summer ____ hours per week
	In winter ____ hours per week
Hours per day of recreational activity computed from [(mean of summer and winter hours per week cycling) + (mean of summer and winter hours per week other physical exercise)]/7