The present study comprised 1,781 nurses who participated in an investigation about
working conditions, sleep, and health. They answered a questionnaire about age, sex,
marital status, children living at home, work hours per week, number of night shifts last
year, and total sleep duration and that also included a validated instrument assessing
workaholism. In addition, they were asked to report on eight items concerning negative
work-related incidents (dozed off at work, dozed while driving, harmed or nearly harmed
self, harmed or nearly harmed patients/others, and harmed or nearly harmed equipment).
Logistic regression analyses identified several predictors of these specific incidents:
Low age (dozed at work, harmed and nearly harmed self, harmed and nearly harmed
equipment), male sex (harmed and nearly harmed self, nearly harmed equipment), not living
with children (harmed patients/others), low percentage of full-time equivalent (nearly
harmed self and harmed patients/others), number of night shifts last year (dozed off at
work and while driving, nearly harmed patients/others) and sleep duration (inversely
related to dozed off at work and while driving, nearly harmed self). However, the most
consistent predictor of negative work-related incidents was workaholism which was
positively and significantly associated with all the eight incidents.