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Associations between occupational relative aerobic workload and resting blood pressure among different age groups : a cross-sectional analysis in the DPhacto study

(2019) BMJ OPEN. 9(9).
Author
Organization
Abstract
Objective: High levels of occupational physical activity (OPA) increase heart rate, blood pressure (BP) and the risk of hypertension. Older workers may be more vulnerable to high levels of OPA due to age-related degeneration of the cardiovascular system and cardiorespiratory fitness. This study investigates the association of relative aerobic workload (RAW) with resting BP and examines if this relation is moderated by age. Design: Cross-sectional epidemiological study. Setting: Data were collected among employees of 15 Danish companies in the cleaning, manufacturing and transport sectors. Participants: 2107 employees were invited for participation, of these 1087 accepted and 562 (42% female and 4% non-Westerns) were included in the analysis based on the criteria of being non-pregnant, no allergy to bandages, sufficient amount of heart rate data corresponding to >= 4 work hours per workday or 75% of average work hours, and no missing outcome and confounder values. Primary and secondary outcome measures: The primary outcome measure was BP. Results: Heart rate reserve was estimated from ambulatory 24-hour heart rate measures covering 2.5 workdays per participant (SD 1.0 day). Age significantly moderated the association between RAW and BP. Mean intensity and duration of high RAW (>= 30% heart rate reserve) showed positive associations with diastolic BP and negative associations with pulse pressure (PP) among participants >= 47 years old. Tendencies towards negative associations between RAW and BP were seen among participants <47 years old. Conclusions: Mean intensity and duration of RAW increased diastolic BP among participants >= 47 years old. Negative associations with PP may be due to healthy worker selection bias. Prevention of hypertension should consider reductions in RAW for ageing workers.
Keywords
ACUTE MYOCARDIAL-INFARCTION, HEART-RATE, PHYSICAL-ACTIVITY, CARDIOVASCULAR-DISEASE, LEISURE-TIME, RISK, MORTALITY, METAANALYSIS, PROGRESSION, FITNESS, HR reserve, physical workload, cardiovascular risk factor, hypertension, occupational physical activity

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MLA
Korshoj, Mette, et al. “Associations between Occupational Relative Aerobic Workload and Resting Blood Pressure among Different Age Groups : A Cross-Sectional Analysis in the DPhacto Study.” BMJ OPEN, vol. 9, no. 9, 2019.
APA
Korshoj, M., Clays, E., Krause, N., Gupta, N., Jorgensen, M. B., & Holtermann, A. (2019). Associations between occupational relative aerobic workload and resting blood pressure among different age groups : a cross-sectional analysis in the DPhacto study. BMJ OPEN, 9(9).
Chicago author-date
Korshoj, Mette, Els Clays, Niklas Krause, Nidhi Gupta, Marie Birk Jorgensen, and Andreas Holtermann. 2019. “Associations between Occupational Relative Aerobic Workload and Resting Blood Pressure among Different Age Groups : A Cross-Sectional Analysis in the DPhacto Study.” BMJ OPEN 9 (9).
Chicago author-date (all authors)
Korshoj, Mette, Els Clays, Niklas Krause, Nidhi Gupta, Marie Birk Jorgensen, and Andreas Holtermann. 2019. “Associations between Occupational Relative Aerobic Workload and Resting Blood Pressure among Different Age Groups : A Cross-Sectional Analysis in the DPhacto Study.” BMJ OPEN 9 (9).
Vancouver
1.
Korshoj M, Clays E, Krause N, Gupta N, Jorgensen MB, Holtermann A. Associations between occupational relative aerobic workload and resting blood pressure among different age groups : a cross-sectional analysis in the DPhacto study. BMJ OPEN. 2019;9(9).
IEEE
[1]
M. Korshoj, E. Clays, N. Krause, N. Gupta, M. B. Jorgensen, and A. Holtermann, “Associations between occupational relative aerobic workload and resting blood pressure among different age groups : a cross-sectional analysis in the DPhacto study,” BMJ OPEN, vol. 9, no. 9, 2019.
@article{8655363,
  abstract     = {Objective: High levels of occupational physical activity (OPA) increase heart rate, blood pressure (BP) and the risk of hypertension. Older workers may be more vulnerable to high levels of OPA due to age-related degeneration of the cardiovascular system and cardiorespiratory fitness. This study investigates the association of relative aerobic workload (RAW) with resting BP and examines if this relation is moderated by age. 
Design: Cross-sectional epidemiological study. 
Setting: Data were collected among employees of 15 Danish companies in the cleaning, manufacturing and transport sectors. 
Participants: 2107 employees were invited for participation, of these 1087 accepted and 562 (42% female and 4% non-Westerns) were included in the analysis based on the criteria of being non-pregnant, no allergy to bandages, sufficient amount of heart rate data corresponding to >= 4 work hours per workday or 75% of average work hours, and no missing outcome and confounder values. 
Primary and secondary outcome measures: The primary outcome measure was BP. 
Results: Heart rate reserve was estimated from ambulatory 24-hour heart rate measures covering 2.5 workdays per participant (SD 1.0 day). Age significantly moderated the association between RAW and BP. Mean intensity and duration of high RAW (>= 30% heart rate reserve) showed positive associations with diastolic BP and negative associations with pulse pressure (PP) among participants >= 47 years old. Tendencies towards negative associations between RAW and BP were seen among participants <47 years old. 
Conclusions: Mean intensity and duration of RAW increased diastolic BP among participants >= 47 years old. Negative associations with PP may be due to healthy worker selection bias. Prevention of hypertension should consider reductions in RAW for ageing workers.},
  articleno    = {e029713},
  author       = {Korshoj, Mette and Clays, Els and Krause, Niklas and Gupta, Nidhi and Jorgensen, Marie Birk and Holtermann, Andreas},
  issn         = {2044-6055},
  journal      = {BMJ OPEN},
  keywords     = {ACUTE MYOCARDIAL-INFARCTION,HEART-RATE,PHYSICAL-ACTIVITY,CARDIOVASCULAR-DISEASE,LEISURE-TIME,RISK,MORTALITY,METAANALYSIS,PROGRESSION,FITNESS,HR reserve,physical workload,cardiovascular risk factor,hypertension,occupational physical activity},
  language     = {eng},
  number       = {9},
  pages        = {8},
  title        = {Associations between occupational relative aerobic workload and resting blood pressure among different age groups : a cross-sectional analysis in the DPhacto study},
  url          = {http://dx.doi.org/10.1136/bmjopen-2019-029713},
  volume       = {9},
  year         = {2019},
}

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