Population description
The study population consisted of a majority
of male subjects (67.9%) with an average age
of 32. More than half (61.9%) of the
subjects worked as computer programmers or
in a related field (quality assurance, technical
support, system administrators). The rest were
management, marketing, and secretarial (Table 1).
Most (87.8%) subjects between the ages of
23–29 worked as programmers, compared to
15.4% of those between the ages of 40 and 67
(Po0:001).