Night work, mortality, and the link to occupational group and sex
OBJECTIVE: Night shifts are associated with several major diseases. Mortality has been studied only to a limited extent, and the association with night shifts remains unclear. The purpose of the present study was to investigate the association between duration of night shift exposure and mortality i...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nordic Association of Occupational Safety and Health (NOROSH)
2020-09-01
|
| Series: | Scandinavian Journal of Work, Environment & Health |
| Subjects: | |
| Online Access: |
https://www.sjweh.fi/show_abstract.php?abstract_id=3892
|
| _version_ | 1818724852331184128 |
|---|---|
| author | Torbjörn Åkerstedt Jurgita Narusyte Pia Svedberg |
| author_facet | Torbjörn Åkerstedt Jurgita Narusyte Pia Svedberg |
| author_sort | Torbjörn Åkerstedt |
| collection | DOAJ |
| description | OBJECTIVE: Night shifts are associated with several major diseases. Mortality has been studied only to a limited extent, and the association with night shifts remains unclear. The purpose of the present study was to investigate the association between duration of night shift exposure and mortality in a large sample from the Swedish Twin Registry (the SALT cohort). METHODS: Cox proportional hazards regression models were used to analyze the data (N=42 731) over a follow-up period of 18 years, with years of night shift work as the exposure variable and adjustment for lifestyle factors and age, and stratification on gender and occupational group. RESULTS: The hazard ratio (HR) for “ever” night shifts for total mortality was 1.07 [95% confidence interval (CI) 1.01–1.15] but 1.15 (95% CI 1.07–1.25) for longer exposure (>5 years). Also, HR for cause-specific mortality due to cardiovascular disease was significant, with higher HR for longer night shift exposure. Mortality due to cancer was significant for longer exposure only. White-collar workers showed significant HR for longer exposure. In particular, male white-collar workers showed a significant HR, with a highest value for longer exposure [HR 1.28 (95% CI 1.09–1.49)]. Heredity did not influence the results significantly. CONCLUSIONS: Long duration of exposure to night shift work is associated with increased mortality, particularly in male white-collar workers. The lack of effects of accumulated exposure suggests that the results should be interpreted with caution. |
| first_indexed | 2024-12-17T21:33:00Z |
| format | Article |
| id | doaj.art-e498b31aa2984b828f951b4f284a26be |
| institution | Directory Open Access Journal |
| issn | 0355-3140 1795-990X |
| language | English |
| last_indexed | 2024-12-17T21:33:00Z |
| publishDate | 2020-09-01 |
| publisher | Nordic Association of Occupational Safety and Health (NOROSH) |
| record_format | Article |
| series | Scandinavian Journal of Work, Environment & Health |
| spelling | doaj.art-e498b31aa2984b828f951b4f284a26be2022-12-21T21:31:49ZengNordic Association of Occupational Safety and Health (NOROSH)Scandinavian Journal of Work, Environment & Health0355-31401795-990X2020-09-0146550851510.5271/sjweh.38923892Night work, mortality, and the link to occupational group and sexTorbjörn Åkerstedt0Jurgita NarusytePia SvedbergDepartment of Clinical Neuroscience, Karolinska Institutet, 17177 Stockholm, Sweden.OBJECTIVE: Night shifts are associated with several major diseases. Mortality has been studied only to a limited extent, and the association with night shifts remains unclear. The purpose of the present study was to investigate the association between duration of night shift exposure and mortality in a large sample from the Swedish Twin Registry (the SALT cohort). METHODS: Cox proportional hazards regression models were used to analyze the data (N=42 731) over a follow-up period of 18 years, with years of night shift work as the exposure variable and adjustment for lifestyle factors and age, and stratification on gender and occupational group. RESULTS: The hazard ratio (HR) for “ever” night shifts for total mortality was 1.07 [95% confidence interval (CI) 1.01–1.15] but 1.15 (95% CI 1.07–1.25) for longer exposure (>5 years). Also, HR for cause-specific mortality due to cardiovascular disease was significant, with higher HR for longer night shift exposure. Mortality due to cancer was significant for longer exposure only. White-collar workers showed significant HR for longer exposure. In particular, male white-collar workers showed a significant HR, with a highest value for longer exposure [HR 1.28 (95% CI 1.09–1.49)]. Heredity did not influence the results significantly. CONCLUSIONS: Long duration of exposure to night shift work is associated with increased mortality, particularly in male white-collar workers. The lack of effects of accumulated exposure suggests that the results should be interpreted with caution. https://www.sjweh.fi/show_abstract.php?abstract_id=3892 gendernight workshift workersexoccupational groupnight shiftcardiovasculartwinblue-collar workwhite-collar workexposureoccupationcancermortalityshift work |
| spellingShingle | Torbjörn Åkerstedt Jurgita Narusyte Pia Svedberg Night work, mortality, and the link to occupational group and sex Scandinavian Journal of Work, Environment & Health gender night work shift worker sex occupational group night shift cardiovascular twin blue-collar work white-collar work exposure occupation cancer mortality shift work |
| title | Night work, mortality, and the link to occupational group and sex |
| title_full | Night work, mortality, and the link to occupational group and sex |
| title_fullStr | Night work, mortality, and the link to occupational group and sex |
| title_full_unstemmed | Night work, mortality, and the link to occupational group and sex |
| title_short | Night work, mortality, and the link to occupational group and sex |
| title_sort | night work mortality and the link to occupational group and sex |
| topic | gender night work shift worker sex occupational group night shift cardiovascular twin blue-collar work white-collar work exposure occupation cancer mortality shift work |
| url |
https://www.sjweh.fi/show_abstract.php?abstract_id=3892
|
| work_keys_str_mv | AT torbjornakerstedt nightworkmortalityandthelinktooccupationalgroupandsex AT jurgitanarusyte nightworkmortalityandthelinktooccupationalgroupandsex AT piasvedberg nightworkmortalityandthelinktooccupationalgroupandsex |