The website of the ICOH Committee on Shiftwork and Working Time, a committee of the International Commission on Occupational Health (ICOH)

Shiftwork and Diabetes

 Some Reads. April 2014

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Contributot Notes & Abstract

Relationship Between Shift Work and Clustering of the Metabolic Syndrome Diagnostic Components

Imelda Wong

CITATION: Kawabe Y, Nakamura Y, Kikuchi S, Murakami Y, Tanaka T, Takebayashi T, Okayama A, Miura K, Okamura T, Ueshima H, J Atheroscler Thromb. 2014 Mar 5. [Epub ahead of print]
ABSTRACT/RESULTS: This study examined the relationship between the type of work and the number of metabolic syndrome diagnostic components (MetS-DC), as well as the risk of MetS, with adjustment for lifestyle habits in Japanese workers.   MetS-DC was defined as: 1) high blood pressure (BP): systolic BP ≥ 130 mmHg, or diastolic BP ≥ 85 mmHg, or the use of antihypertensive drugs; 2) dyslipidemia: high-density lipoprotein-cholesterol concentration
40 mg/dl or triglyceride concentration ≥ 150 mg/dl, or on medication for dyslipidemia; 3) dysglycemia: fasting blood sugar level ≥ 110 mg/dl, or if less than eight hours after meals ≥ 140 mg/dl, or on medication for diabetes mellitus; 4) overweight: a body mass index ≥ 25 kg/m2.  MetS was defined  as overweight plus two or more of the MetS-DC. Results showed that fixed nighttime (regression coefficient [b]=-0.233, P=0.028) and shift work (b=0.098, P=0.034) independently contributed to the number of MetS-DC, compared to daytime work. Analyses also showed that shift work was positively related to MetS (odd ratio=1.47, P0.01). Conclusion: Shift work were significantly associated with the number of MetS-DC, and was related to risk of MetS compared to daytime work.

Exposure to shift work as a risk factor for diabetes

Imelda Wong

CITATION: Monk TH, Buysse DJ (2013) J Biol Rhythms; 28(5):356-9
ABSTRACT/RESULTS: Shift work exposed groups showed an increased proportion of self-reported diabetes (χ(2) = 22.32, p < 0.001), with odds ratios (ORs) of about 2 when compared to the 0-year group. The effect remained significant after adjusting for gender and body mass index (BMI) (OR ≥ 1.4; χ(2) = 10.78, p < 0.05). There was a significant shift work exposure effect on BMI (χ(2) = 80.70, p < 0.001) but no significant gender effect (χ(2) = 0.37, p > 0.50)

The effects of shift work on sleeping quality, hypertension and diabetes in retired workers

Imelda Wong

CITATION: Guo Y1, Liu Y, Huang X, Rong Y, He M, Wang Y, Yuan J, Wu T, Chen W. (2013) PLoS One. 2013 Aug 16;8(8):e71107
ABSTRACT/RESULTS: Shift work may be an independent risk factor for sleeping quality, diabetes and hypertension even in retired workers. However, with the extension of leaving shift work duration, the effects of shift work on sleep quality gradually reduced.

Retrospective cohort study of the risk of impaired glucose tolerance among shift workers

Tatsuhiko Kubo

CITATION: Oyama I1, Kubo T, Fujino Y, Kadowaki K, Kunimoto M, Shirane K, Tabata H, Sabanai K, Nakamura T, Matsuda S (2012) Scand J Work Environ Health; 38(4):337-42.
ABSTRACT/RESULTS: The study revealed 2-shift workers had a higher risk than 3-shift workers. Additional, The risk was observed even among workers whose body mass remained within the normal range.

Night shift work increases the risk for type 2 diabetes

John Axelsson

CITATION: Axelsson J, Puttonen S (2012). Evid Based Med;17(6):193-4
ABSTRACT/RESULTS: This is a commentary on the study by Pan and colleagues in PlosMed 2011, that highlights its strngths, weaknesses and suggest how to minimize the risks.

[Role of waist circumference in the diagnosis of metabolic syndrome and assessment of cardiovascular risk in shift workers]

James Miller

CITATION: Copertaro, A., Bracci, M., Barbaresi, M., & Santarelli, L. (2008). La Medicina Del Lavoro, 99(6), 444-453.
ABSTRACT/RESULTS: Copertaro, Bracci, Barbaresi, and Santarelli (2008) compared “the criteria of the National Cholesterol Education Panel (NCEP), revised NCEP (NCPEP-R) and International Diabetes Federation (IDF) metabolic syndrome [MS] criteria for the diagnosis of MS, also to explore how metabolic risk factors for CVD [cardiovascular disease] differ between shift workers and day workers in a cohort of [552] Italian workers.” “In comparison with day workers, rotating shift nurses had greater waist circumference, higher serum triglycerides and fasting plasma glucose, and lower concentrations of HDL cholesterol … No significant association between MS and shift work was found. ... Shift work was significantly associated with high triglycerides and abdominal obesity using IDF criteria. Measurement of waist circumference is a simple and non-invasive method to use in the evaluation of metabolic risk factor for CVD.”

Prevalent cardiovascular disease, risk factors and selection out of shift work.

John Axelsson

CITATION: Kivimäki M, Virtanen M, Elovainio M, Väänänen A, Keltikangas-Järvinen L, Vahtera J (2006) Scand J Work Environ Health; 32(3):204-8
ABSTRACT/RESULTS: The study concerns the healthy worker effect in shift workers and diabetes. Among the shift workers, the age-adjusted odds for leaving the organization was 1.83 (95% CI 1.01-3.32) times higher for those with prevalent diabetes and 2.21 (95% CI 1.12-4.39) times higher for those with three to four risk factors than for their counterparts with no diabetes or risk factors.

Shift work and the risk of diabetes mellitus among Japanese male factory workers

Anna Korompeli

CITATION: Morikawa Y1, Nakagawa H, Miura K, Soyama Y, Ishizaki M, Kido T, Naruse Y, Suwazono Y, Nogawa K (2005). Scan J Work Environ Health; 31(3):179-183
ABSTRACT/RESULTS: This paper address the question of interest because is a cohort study which resulted that the 2-shift, 3 -shift (no statistical significant) have more relative risk of being diagnosed with diabetes mellitus compared to workers with daytime shift, taking into consideration confounding factors. This paper contributes in the research area as there are not many papers dealing with diabetes

Metabolic disturbances in male workers with rotating three-shift work. Results of the WOLF study

James Miller

CITATION: Karlsson, B., Knutsson, A., Lindahl, B., & Alfredsson, L. (2003). International Archives of Occupational and Environmental Health, 76(6), 424-430.
ABSTRACT/RESULTS: Karlsson, Knutsson, Lindahl, and Alfredsson (2003) investigated “the relationship between important metabolic risk factors for coronary heart disease (CHD) and type 2 diabetes in shift workers and day workers” using cross-sectional data from a sub-population in the WOLF study consisting of 665 day workers and 659 three-shift workers in two plants.” “A higher proportion of shift workers than day workers had high triglyceride levels, low levels of HDL-cholesterol and abdominal obesity. The risk of low HDL-cholesterol was doubled in shift workers after being adjusted for age, socio-economic factors, physical activity, current smoking, social support and job strain. High levels of triglycerides were also significantly associated with shift work. The OR for abdominal obesity was 1.19. The prevalence of hyperglycaemia was similar in day and shift workers. No significant interaction was seen between shift work and abdominal obesity with regard to the associations with triglycerides and HDL-cholesterol.”

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