The purpose of the present study was to answer the following research questions: (1) Do
workers in different shift schedules differ in mental distress? (2) Do workers in
different shift schedules differ in neuroticism? (3) Do shift schedules differ in
psychosocial work exposures? (4) Do psychosocial work exposures contribute to mental
distress among onshore- and offshore workers? (5) Does neuroticism confound the
association between work exposures and mental distress? Workers on six shift-schedules
answered a questionnaire (1,471 of 2,628 employees). Psychological and social work factors
were measured by QPSNordic, mental distress was measured by HADS and
neuroticism was measured by EPQ. The results showed 1) No differences in mental distress
between workers in different shift schedules, 2) Revolving-shift workers reported higher
neuroticism compared to day workers, 3) Swing-shift workers and revolving-shift workers
reported lower job control compared to permanent-night and -day workers, 4) Job demands
and role conflict were associated with more mental distress. Job control, role clarity,
support, and leadership were associated with lower mental distress, 5) Neuroticism
influenced the relationship between psychosocial work factors and mental distress. The
present study did not find differences in mental distress between shift schedules. Job
characteristics may be contributing factors when determining health effects of shift
work.