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© 1994 Oxford University Press

other

Employment Status, Non-Daytime Work and Gastric Ulcer In Men

FINN TÜCHSEN*, JEPPE JEPPESEN{dagger} and ELSA BACH*

* National Institute of Occupational Health Lersĝ Parkallé105, DK-2100 Copenhagen Ĝ, Denmark
{dagger} Department of Occupational Medicine, Aalborg regional Hospital Denmark

BACKGROUND: An excess risk of gastric ulcer (GU) (ICD-8: 531) has formerly been found in shift workers and ex-shiftworkers but littie is known about the risk of GU associated with other forms of non-daytime work. This study deals with associations between non-daytime work and GU.

METHODS: A fixed cohort of 122 116 men in occupations in which at least 20% had non-daytime work and a reference group of 593 281 men in occupations with daytime work only, was followed in the National inpatient Register for first discharges with GU as the principal diagnosis.

RESULTS: For men with daytime work only we found a steep inverse association between GU and employment status. Men in occupational groups with late evening work had a standardized hospitalization ratio (SHR) of 236 (90% confidence interval [CI]: 184–299), groups working in rosters covering 24-hour services had an SHR of 147 (90% CI: 116–183). A slightly raised risk of 114 (90% CI: 101–128) was found in groups having other forms of non-daytime work. For all men in groups with non-daytime work we found a significant SHR of 130 (90% CI: 1187–142).

CONCLUSION: We condude that both low employment status and non-daytime work are associated with an increased risk of GU.

Received 1 August 1993


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