BACKGROUND: An excess risk of gastric ulcer (GU) (ICD-8: 531) has formerly been found in shift workers and ex-shiftworkers but little 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 [Cl]: 184-299), groups working in rosters covering 24-hour services had an SHR of 147 (90% Cl: 116-183). A slightly raised risk of 114 (90% Cl: 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% Cl: 118-142). CONCLUSION: We conclude that both low employment status and non-daytime work are associated with an increased risk of GU.
BACKGROUND: An excess risk of gastric ulcer (GU) (ICD-8: 531) has formerly been found in shift workers and ex-shiftworkers but little 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 [Cl]: 184-299), groups working in rosters covering 24-hour services had an SHR of 147 (90% Cl: 116-183). A slightly raised risk of 114 (90% Cl: 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% Cl: 118-142). CONCLUSION: We conclude that both low employment status and non-daytime work are associated with an increased risk of GU.
Authors: N W H Jansen; L G P M van Amelsvoort; T S Kristensen; P A van den Brandt; I J Kant Journal: Occup Environ Med Date: 2003-06 Impact factor: 4.402
Authors: Erika L Sabbath; Maria Melchior; Marcel Goldberg; Marie Zins; Lisa F Berkman Journal: Eur J Public Health Date: 2011-05-09 Impact factor: 3.367