Effects of irregular-shift work and physical activity on cardiovascular risk factors in truck drivers.

OBJECTIVE To analyze the putative effect of type of shift and its interaction with leisure-time physical activity on cardiovascular risk factors in truck drivers. METHODS A cross-sectional study was undertaken on 57 male truck drivers working at a transportation company, of whom 31 worked irregular shifts and 26 worked on the day-shift. Participants recorded their physical activity using the International Physical Activity Questionnaire along with measurements of blood pressure, body mass index and waist-hip ratio. Participants also provided a fasting blood sample for analysis of lipid-related outcomes. Data were analyzed using a factorial model which was covariate-controlled for age, smoking, work demand, control at work and social support. RESULTS Most of the irregular-shift and day-shift workers worked more than 8 hours per day (67.7% and 73.1%, respectively). The mean duration of experience working the irregular schedule was 15.7 years. Day-shift workers had never engaged in irregular-shift work and had been working as a truck driver for 10.8 years on average. The irregular-shift drivers had lower work demand but less control compared to day-shift drivers (p < 0.05). Moderately-active irregular-shift workers had higher systolic and diastolic arterial pressures (143.7 and 93.2 mmHg, respectively) than moderately-active day-shift workers (116 and 73.3 mmHg, respectively) (p < 0.05) as well as higher total cholesterol concentrations (232.1 and 145 mg/dl, respectively) (p = 0.01). Irrespective of their physical activity, irregular-shift drivers had higher total cholesterol and LDL-cholesterol concentrations (211.8 and 135.7 mg/dl, respectively) than day-shift workers (161.9 and 96.7 mg/dl, respectively (ANCOVA, p < 0.05). CONCLUSIONS Truck drivers are exposed to cardiovascular risk factors due to the characteristics of the job, such as high work demand, long working hours and time in this profession, regardless of shift type or leisure-time physical activity.

[1]  L. Alfredsson,et al.  Metabolic disturbances in male workers with rotating three-shift work. Results of the WOLF study , 2003, International archives of occupational and environmental health.

[2]  H. Bøggild,et al.  Shift work, risk factors and cardiovascular disease. , 1999, Scandinavian journal of work, environment & health.

[3]  R. Heshmat,et al.  Shift working and risk of lipid disorders: A cross-sectional study , 2006, Lipids in Health and Disease.

[4]  Pamela J Whitfield Jacobson,et al.  Long-haul truck drivers want healthful meal options at truck-stop restaurants. , 2007, Journal of the American Dietetic Association.

[5]  A. Garde,et al.  Cardiovascular risk factors and primary selection into shift work. , 2008, Scandinavian journal of work, environment & health.

[6]  Laurence Mabile,et al.  Shift Work and Metabolic Syndrome: Respective Impacts of Job Strain, Physical Activity, and Dietary Rhythms , 2009, Chronobiology international.

[7]  A. Lowden,et al.  Eating and shift work - effects on habits, metabolism and performance. , 2010, Scandinavian journal of work, environment & health.

[8]  Guilbert Jj.  The world health report 2002 - reducing risks, promoting healthy life. , 2003 .

[9]  Who Consultation on Obesity.  Obesity: preventing and managing the global epidemic. Report of a WHO consultation. , 2000, World Health Organization technical report series.

[10]  S. Grundy,et al.  Implications of recent clinical trials for the National Cholesterol Education Program Adult Treatment Panel III guidelines. , 2004, Arteriosclerosis, thrombosis, and vascular biology.

[11]  D. Consonni,et al.  Metabolic Syndrome in Permanent Night Workers , 2008, Chronobiology international.

[12]  Shah Ebrahim,et al.  European guidelines on cardiovascular disease prevention in clinical practice , 2004 .

[13]  F. Louzada,et al.  High Risk for Obstructive Sleep Apnea in Truck Drivers Estimated by the Berlin Questionnaire: Prevalence and Associated Factors , 2004, Chronobiology international.

[14]  Shah Ebrahim,et al.  Fourth Joint Task Force of the European Society of Cardiology and other Societies on Cardiovascular Disease Prevention in Clinical Practice (constituted by representatives of nine societies and by invited experts) , 2007 .

[15]  Patrícia Nehme,et al.  Distúrbios psíquicos menores e condições de trabalho em motoristas de caminhão , 2010 .

[16]  C. Moreno,et al.  The Nutritional Status and Eating Habits of Shift Workers: A Chronobiological Approach , 2004, Chronobiology international.

[17]  J. Guilbert.  The world health report 2002 - reducing risks, promoting healthy life. , 2003, Education for health.

[18]  Jungsun Park,et al.  Shiftwork and Metabolic Risk Factors of Cardiovascular Disease , 2005, Journal of occupational health.

[19]  T. Lang,et al.  Facteurs socioprofessionnels, contraintes de l’environnement professionnel et maladies cardiovasculaires , 2002 .

[20]  E. Marqueze,et al.  Irregular working times and metabolic disorders among truck drivers: a review. , 2012, Work.

[21]  G. Atkinson,et al.  Exercise, Energy Balance and the Shift Worker , 2008, Sports medicine.

[22]  T. Araújo,et al.  QUESTIONÁRIO INTERNACIONAL DE ATIVIDADE FÍSICA (IPAQ): ESTUPO DE VALIDADE E REPRODUTIBILIDADE NO BRASIL , 2001 .

[23]  Dóra Chor,et al.  Versão resumida da "job stress scale": adaptação para o português , 2004 .

[24]  F. Louzada,et al.  Short Sleep Is Associated with Obesity among Truck Drivers , 2006, Chronobiology international.