For example, a woman working one full-time year (always assigned 2,000 hr per year) in evisceration (H-3) and two fulltime years (4,000 hr) in overwrap (M -2) had a cumulative exposure assignment of rank-hours. Values for individuals who had worked in more than one department Additional were summed at the baseline evaluation. cumulative exposure was assigned at each follow-up period based on self-report of job changes