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Wei CF, Chen MH, Lin CC, Tsai MS, Guo YL, Lin SJ, Chavarro JE, Hsieh WS, Chen PC. Pre-pregnancy shift work's influence on postpartum weight retention: Body mass index's role. Chronobiol Int 2024; 41:1156-1164. [PMID: 39078070 DOI: 10.1080/07420528.2024.2382909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 07/16/2024] [Accepted: 07/16/2024] [Indexed: 07/31/2024]
Abstract
Shift work is a prevalent workplace exposure, which increases the possibility of unhealthy behaviours and circadian rhythm disruptions and elevates the risk of metabolic diseases and adverse reproductive outcomes. But its potential of increasing the risk of postpartum weight retention remains uncertain. This study aimed to investigate the association between maternal shift work prior to conception and postpartum weight retention, and to identify modifiable factors during pregnancy for prevention. We analysed data from the Taiwan Birth Cohort Study, a prospective cohort of Taiwanese women who gave birth in 2005. We examined the pre-conceptional shift work status of 13,575 mothers and their body weight before pregnancy, before delivery, six and eighteen months after delivery. We used multivariable linear models to examine associations and effect modifications. Maternal shift work before pregnancy was significantly associated with increased postpartum weight retention at six and eighteen months (β-estimate for six months: 0.19-kilogram, 95% CI: 0.03-0.34; eighteen months: 0.23-kilogram, 95% CI: 0.04-0.40). The association between shift work and weight retention at six months postpartum was stronger among mothers who were overweight or obese before pregnancy than mothers with normal weight. This study showed the impact of shift work on postpartum weight retention and suggested a stronger association among mothers with overweight or obesity before pregnancy.
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Affiliation(s)
- Chih-Fu Wei
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
- Department of Environmental and Occupational Medicine, National Taiwan University Hospital, Yunlin, Taiwan
| | - Mei-Huei Chen
- Institute of Population Health Sciences, National Health Research Institutes, Miaoli, Taiwan
- Department of Paediatrics, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Ching-Chun Lin
- Institute of Environmental and Occupational Health Sciences, National Taiwan University College of Public Health, Taipei, Taiwan
| | - Meng-Shan Tsai
- Institute of Environmental and Occupational Health Sciences, National Taiwan University College of Public Health, Taipei, Taiwan
| | - Yueliang Leon Guo
- Institute of Environmental and Occupational Health Sciences, National Taiwan University College of Public Health, Taipei, Taiwan
- Department of Environmental and Occupational Medicine, National Taiwan University College of Medicine and Hospital, Taipei, Taiwan
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Shio-Jean Lin
- Department of Paediatrics, Chi Mei Medical Center, Tainan, Taiwan
| | - Jorge E Chavarro
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Wu-Shiun Hsieh
- Department of Paediatrics, National Taiwan University College of Medicine, Taipei, Taiwan
- Department of Paediatrics, Cathay General Hospital, Taipei, Taiwan
- School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Pau-Chung Chen
- Institute of Environmental and Occupational Health Sciences, National Taiwan University College of Public Health, Taipei, Taiwan
- Department of Environmental and Occupational Medicine, National Taiwan University College of Medicine and Hospital, Taipei, Taiwan
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
- Department of Public Health, National Taiwan University College of Public Health, Taipei, Taiwan
- Innovation and Policy Centre for Population Health and Sustainable Environment, National Taiwan University College of Public Health, Taipei, Taiwan
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MacDonald LA, Johnson CY, Lu ML, Santiago-Colón A, Adam GP, Kimmel HJ, Napolitano PG, Saldanha IJ. Physical job demands in pregnancy and associated musculoskeletal health and employment outcomes: a systematic review. Am J Obstet Gynecol 2024; 230:583-599.e16. [PMID: 38109950 PMCID: PMC11139607 DOI: 10.1016/j.ajog.2023.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 12/12/2023] [Accepted: 12/12/2023] [Indexed: 12/20/2023]
Abstract
OBJECTIVE A decline in musculoskeletal health during pregnancy is an underappreciated adverse outcome of pregnancy that can have immediate and long-term health consequences. High physical job demands are known risk factors for nontraumatic musculoskeletal disorders in the general working population. Evidence from meta-analyses suggest that occupational lifting and prolonged standing during pregnancy may increase risk of adverse pregnancy outcomes. This systematic review examined associations between occupational lifting or postural load in pregnancy and associated musculoskeletal disorders and related sequalae. DATA SOURCES Five electronic databases (Medline, Embase, CINAHL, NIOSHTIC-2, and Ergonomic Abstracts) were searched from 1990 to July 2022 for studies in any language. A Web of Science snowball search was performed in December 2022. Reference lists were manually reviewed. STUDY ELIGIBILITY CRITERIA Eligible studies reported associations between occupational lifting or postural load and musculoskeletal health or sequelae (eg, employment outcomes) among pregnant and postpartum workers. METHODS Data were extracted using a customized form to document study and sample characteristics; and details of exposures, outcomes, covariates, and analyses. Investigators independently assessed study quality for 7 risk-of-bias domains and overall utility, with discrepant ratings resolved through discussion. A narrative synthesis was conducted due to heterogeneity. RESULTS Sixteen studies (11 cohort studies, 2 nested case-control studies, and 3 cross-sectional studies) from 8 countries were included (N=142,320 pregnant and N=1744 postpartum workers). Limited but consistent evidence with variable quality ratings, ranging from critical concern to high, suggests that pregnant workers exposed to heavy lifting (usually defined as ≥22 lbs or ≥10 kg) may be at increased risk of functionally limiting pelvic girdle pain and antenatal leave. Moreover, reports of dose-response relationships suggest graded risk levels according to lifting frequency, ranging from 21% to 45% for pelvic girdle pain and 58% to 202% for antenatal leave. Limited but consistent evidence also suggests that postural load increases the risk of employment cessation. CONCLUSION Limited but consistent evidence suggests that pregnant workers exposed to heavy lifting and postural load are at increased risk of pelvic girdle pain and employment cessation. Job accommodations to reduce exposure levels may promote safe sustainable employment for pregnant workers.
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Affiliation(s)
- Leslie A MacDonald
- Division of Field Studies and Engineering, National Institute for Occupational Safety and Health (NIOSH), Cincinnati, OH.
| | - Candice Y Johnson
- Division of Field Studies and Engineering, National Institute for Occupational Safety and Health (NIOSH), Cincinnati, OH; Division of Occupational and Environmental Medicine, Department of Family Medicine and Community Health, Duke University, Durham, NC
| | - Ming-Lun Lu
- Division of Field Studies and Engineering, National Institute for Occupational Safety and Health (NIOSH), Cincinnati, OH
| | - Albeliz Santiago-Colón
- World Trade Center Health Program, National Institute for Occupational Safety and Health, Cincinnati, OH
| | - Gaelen P Adam
- Center for Evidence Synthesis in Health, Department of Health Services, Policy and Practice, Brown University School of Public Health, Providence, RI
| | | | - Peter G Napolitano
- Department of Obstetrics and Gynecology, University of Washington, Seattle, WA
| | - Ian J Saldanha
- Center for Evidence Synthesis in Health, Department of Health Services, Policy and Practice, Brown University School of Public Health, Providence, RI; Center for Clinical Trials and Evidence Synthesis, Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
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Xue Y, Miao L, Xu P, Yang X, Qu M, Lai H. Potential Effect of Combined Exposure of Crystalline Silica Dust and Cigarette Smoking on the Incidence of Silicosis among Chinese Male Stone Processing Workers: A Cross-Sectional Study. Healthcare (Basel) 2023; 11:2260. [PMID: 37628458 PMCID: PMC10454731 DOI: 10.3390/healthcare11162260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 07/29/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
Background: Silicosis is a progressive and irreversible disease primarily caused by exposure to crystalline silica dust and, to a lesser extent, cigarette smoking. However, further research is needed to validate the potential combined effect of these risk factors on the increased incidence of the disease. Methods: A total of 1688 male workers employed at a Chinese stone processing plant between 1 January 1999 and 31 December 2019, were included in the study. Cumulative exposure to industrial crystalline silica dust and packyears of smoking were collected through health surveillance, and odds ratios (ORs) with 95% confidence intervals (CIs) for silicotic changes due to industrial silica exposure and cigarette smoking were estimated using logistic regression models. Results: Among all participants, a significant exposure-response relationship was observed between long-term exposure to industrial silica dust and radiographic findings resembling silicosis (OR 1.74, 95% CI 1.25 to 2.41). However, among middle-aged workers, a weak and statistically insignificant relationship was found between prolonged cigarette smoking and X-ray evidence of lung silicosis (OR 1.59, 95% CI 1.00 to 2.53). Furthermore, significant combined effects, exceeding the additive models, were identified in each age group and employment sector (relative risk due to interaction 0.51, 95% CI 0.08 to 3.42). Conclusions: It is critically important to implement effective dust removal measures and tobacco control strategies in order to enhance respiratory health among employees across all age groups in the stone processing industry.
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Affiliation(s)
- Yu Xue
- Department of Radiology and Functional Examination, Nanjing Prevention and Treatment Center for Occupational Diseases, Nanjing 210018, China; (Y.X.); (P.X.)
| | - Long Miao
- Department of Occupational and Environmental Health, School of Public Health, Yangzhou University, Yangzhou 225009, China; (L.M.); (M.Q.)
| | - Ping Xu
- Department of Radiology and Functional Examination, Nanjing Prevention and Treatment Center for Occupational Diseases, Nanjing 210018, China; (Y.X.); (P.X.)
| | - Xinglong Yang
- Department of Clinical Medicine, School of Medicine, Yangzhou University, Yangzhou 225009, China;
| | - Man Qu
- Department of Occupational and Environmental Health, School of Public Health, Yangzhou University, Yangzhou 225009, China; (L.M.); (M.Q.)
| | - Hanpeng Lai
- Department of Occupational and Environmental Health, School of Public Health, Yangzhou University, Yangzhou 225009, China; (L.M.); (M.Q.)
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Spinder N, Bergman JEH, van Tongeren M, Boezen HM, Kromhout H, de Walle HEK. Maternal occupational exposure to endocrine-disrupting chemicals and urogenital anomalies in the offspring. Hum Reprod 2021; 37:142-151. [PMID: 34741174 PMCID: PMC8730314 DOI: 10.1093/humrep/deab205] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 08/17/2021] [Indexed: 01/18/2023] Open
Abstract
STUDY QUESTION Is there an association between maternal occupational exposure to endocrine-disrupting chemicals (EDCs) early in pregnancy and subgroups of congenital anomalies of kidney and urinary tract (CAKUT), and hypospadias? SUMMARY ANSWER Exposure to specific EDCs can increase the risk of CAKUT and no association with hypospadias was observed. WHAT IS KNOWN ALREADY Previous studies showed an association between maternal occupational exposure to EDCs and hypospadias. However, little is known about the effect of these chemicals on the development of CAKUT, especially subgroups of urinary tract anomalies. STUDY DESIGN, SIZE, DURATION For this case-control study, cases with urogenital anomalies from the European Concerted Action on Congenital Anomalies and Twins Northern Netherlands (Eurocat NNL) registry and non-malformed controls from the Lifelines children cohort (living in the same catchment region as Eurocat NNL) born between 1997 and 2013 were selected. This study included 530 cases with CAKUT, 364 cases with hypospadias, 7 cases with both a urinary tract anomaly and hypospadias and 5602 non-malformed controls. Cases with a genetic or chromosomal anomaly were excluded, and to avoid genetic correlation, we also excluded cases in which a sibling with the same defect was included. PARTICIPANTS/MATERIALS, SETTING, METHODS Information on maternal occupation held early in pregnancy was collected via self-administered questionnaires. Job titles were translated into occupational exposure to EDCs using a job-exposure matrix (JEM). Adjusted odds ratios (aORs) and 95% CIs were estimated to assess the association between maternal occupational exposure to EDCs (and to specific types of EDCs) and CAKUT and hypospadias. MAIN RESULTS AND THE ROLE OF CHANCE For CAKUT and hypospadias, 23.1% and 22.9% of the cases were exposed to EDCs, respectively, whereas 19.8% of the controls were exposed. We found an association between maternal occupational exposure to organic solvents/alkylphenolic compounds and CAKUT (aOR 1.41, 95% CI 1.01-1.97) that became stronger when combinations of urinary tract anomalies co-occurred with other defects (aOR 7.51, 95% CI 2.41-23.43). An association was also observed for exposure to phthalates/benzophenones/parabens/siloxanes and CAKUT (aOR 1.56, 95% CI 1.06-2.29), specifically urinary collecting system anomalies (aOR 1.62, 95% CI 1.03-2.54) and combinations of urinary tract anomalies (aOR 2.90, 95% CI 1.09-7.71). We observed no association between EDC exposure and hypospadias. LIMITATIONS, REASONS FOR CAUTION The different study designs of Eurocat NNL and Lifelines could have introduced differential information bias. Also, exposure misclassification could be an issue: it is possible that the actual exposure differed from the exposure estimated by the JEM. In addition, women could also have been exposed to other exposures not included in the analysis, which could have resulted in residual confounding by co-exposures. WIDER IMPLICATIONS OF THE FINDINGS Women, their healthcare providers, and their employers need to be aware that occupational exposure to specific EDCs early in pregnancy may be associated with CAKUT in their offspring. An occupational hygienist should be consulted in order to take exposure to those specific EDCs into consideration when risk assessments are carried out at the workplace. STUDY FUNDING/COMPETING INTEREST(S) N.S. was paid by the Graduate School of Medical Sciences (MD/PhD programme), University Medical Center Groningen (UMCG), Groningen, the Netherlands. Eurocat Northern Netherlands is funded by the Dutch Ministry of Health, Welfare and Sports. The Lifelines Biobank initiative has been made possible by subsidy from the Dutch Ministry of Health, Welfare and Sport, the Dutch Ministry of Economic Affairs, the University Medical Center Groningen (UMCG the Netherlands), University Groningen and the Northern Provinces of the Netherlands. The authors report no conflict of interest. TRIAL REGISTRATION NO N/A.
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Affiliation(s)
- N Spinder
- Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - J E H Bergman
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - M van Tongeren
- Division of Population Health, Health Services Research and Primary Care, School of Health Sciences, University of Manchester, Manchester, UK
| | - H M Boezen
- Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
- Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - H Kromhout
- Division of Environmental Epidemiology, Institute for Risk Assessment Science, Utrecht University, the Netherlands
| | - H E K de Walle
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
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Zhao G, Erazo B, Ronda E, Brocal F, Regidor E. Mortality Among Firefighters in Spain: 10 Years of Follow-up. Ann Work Expo Health 2020; 64:614-621. [DOI: 10.1093/annweh/wxaa036] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 03/12/2020] [Accepted: 03/20/2020] [Indexed: 11/13/2022] Open
Abstract
Abstract
Objectives
The objective of this study was to compare mortality rates for the main causes of death and the most frequent sites of cancer in firefighters and all other occupations.
Methods
Mortality was calculated from a longitudinal study conducted between 2001 and 2011 following a total of 9.5 million men aged 20–64 years old who were in employment in 2001. The age-standardized mortality rate for firefighters was calculated for cancer and other causes of death and compared with that for all other occupations using the mortality rate ratio (MRR).
Results
No differences were observed between firefighters and all other occupations for overall mortality [MRR = 0.99, 95% confidence interval (CI): 0.91–1.07] or for mortality from cancer in general (MRR = 1.00, 95% CI: 0.89–1.12). No significant differences were observed in mortality by site of cancer, except for mortality from cancer of larynx (MRR = 1.77, 95% CI: 1.01–3.09) and hypopharynx (MRR = 2.96, 95% CI: 1.31–6.69), which presented a higher magnitude in firefighters. Neither was any significant differences observed between the two groups in mortality due to cardiovascular, respiratory, or digestive diseases or in mortality due to external causes.
Conclusions
Exposure to carcinogens combined with a possible failure to use respiratory protection when fighting fires may be responsible for excess mortality from laryngeal and hypopharyngeal cancer in firefighters. In the future, more research is needed on the health of firefighters and strengthening preventive policies for these workers.
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Affiliation(s)
- Guanlan Zhao
- Preventive Medicine and Public Health Area, University of Alicante, Alicante, Spain
| | - Boris Erazo
- Preventive Medicine and Public Health Area, University of Alicante, Alicante, Spain
| | - Elena Ronda
- Preventive Medicine and Public Health Area, University of Alicante, Alicante, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Planta, Madrid, Spain
| | - Francisco Brocal
- Department of Physics, Systems Engineering and Signal Theory, University of Alicante, Alicante, Spain
| | - Enrique Regidor
- CIBER Epidemiología y Salud Pública (CIBERESP), Planta, Madrid, Spain
- Department of Public Health and Maternal and Child Health, Complutense University of Madrid, Madrid, Spain
- Instituto de Investigación Sanitaria de Hospital Clínico San Carlos (IdISSC), Madrid, Spain
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Spinder N, Almli LM, Desrosiers TA, Arnold KE, Bergman JEH, Kromhout H, Boezen HM, de Walle HEK, Rocheleau C, Reefhuis J. Maternal occupational exposure to solvents and gastroschisis in offspring - National Birth Defects Prevention Study 1997-2011. Occup Environ Med 2020; 77:172-178. [PMID: 31949041 PMCID: PMC7035687 DOI: 10.1136/oemed-2019-106147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 11/27/2019] [Accepted: 12/14/2019] [Indexed: 11/22/2022]
Abstract
Objectives The aim of this study was to assess the association between maternal occupational exposure to solvents and gastroschisis in offspring. Methods We used data from the National Birth Defects Prevention Study, a large population-based case-control study of major birth defects conducted in 10 US states from 1997 to 2011. Infants with gastroschisis were ascertained by active birth defects surveillance systems. Control infants without major birth defects were selected from vital records or birth hospital records. Self-reported maternal occupational histories were collected by telephone interview. Industrial hygienists reviewed this information to estimate exposure to aromatic, chlorinated and petroleum-based solvents from 1 month before conception through the first trimester of pregnancy. Cumulative exposure to solvents was estimated for the same period accounting for estimated exposure intensity and frequency, job duration and hours worked per week. ORs and 95% CIs were estimated to assess the association between exposure to any solvents or solvent classes, and gastroschisis risk. Results Among 879 cases and 7817 controls, the overall prevalence of periconceptional solvent exposure was 7.3% and 7.4%, respectively. Exposure to any solvent versus no exposure to solvents was not associated with gastroschisis after adjusting for maternal age (OR 1.00, 95% CI 0.75 to 1.32), nor was an association noted for solvent classes. There was no exposure-response relationship between estimated cumulative solvent exposure and gastroschisis after adjusting for maternal age. Conclusion Our study found no association between maternal occupational solvent exposure and gastroschisis in offspring. Further research is needed to understand risk factors for gastroschisis.
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Affiliation(s)
- Nynke Spinder
- National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia, United States .,Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, Netherlands.,Department of Genetics, Univeristy of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - Lynn M Almli
- National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia, United States
| | - Tania A Desrosiers
- Gillings School of Global Public Health, Department of Epidemiology, University of North Carolina, Chapel Hill, North Carolina, United States
| | - Kathryn E Arnold
- National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia, United States
| | - Jorieke E H Bergman
- Department of Genetics, Univeristy of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - Hans Kromhout
- Institute for Risk Assessment Sciences, Division of Environmental Epidemiology, Utrecht University, Utrecht, Netherlands
| | - H Marike Boezen
- Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - Hermien E K de Walle
- Department of Genetics, Univeristy of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - Carissa Rocheleau
- National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Cincinnati, Ohio, United States
| | - Jennita Reefhuis
- National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, Georgia, United States
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