Table 3.

WPAI Item and Scale descriptives

	N	M	SD
During the past seven days, how many hours did you miss from work because of your health problems?	740	3.1	8.0
During the past seven days, how many hours did you actually work?	740	33.8	15.5
During the past seven days, how much did your health problems affect your productivity while you were working?	721	3.5	2.6
Thinking of your regular job, how many days in the past seven days were you limited in the amount of work you could do, accomplished less than you would like, or days you could not do your work as carefully as usual?	737	2.2	2.3
% of work time missed due to health (absenteeism)	740	8.2	20.5
% impairment at work due to health (presenteeism)	720	35.2	26.4
% of work missed or work time impaired due to health (absenteeism or presenteeism)	719	37.8	27.5
Hours of impairment at work due to health	720	12.1	11.0
Hours of work missed or work impaired (productivity loss) due to health	719	14.2	12.6