Heat effects among migrant and seasonal farmworkers: a case study in Colorado

Details

• Personal Author:
  Arauz RF ; Chen T-H ; Cooper SP ; Zhang K
• Description:
  Background: Although migrant and seasonal farmworkers are highly vulnerable to ambient heat because of their working conditions, heat effects in this population have been rarely studied. Objectives: We estimated effects of heat on mean daily counts of clinic visits among migrant and seasonal farmworkers by taking advantage of a unique longitudinal medical records database in the USA. Methods: We compiled a daily weather and clinic visit data set based on data from a health centre in Colorado for the summer of 2013. A total of 14,481 patients were included in our analysis, including 150 migrant farmworkers and 231 seasonal farmworkers with an average of 3 and 4 visits per day. We used Poisson regression to estimate the associations between heat and daily all-cause or cardiovascular-specific clinic visits among migrant or seasonal farmworkers or other stratified patients. We defined heat effects as the percentage difference in average daily counts of clinic visits, comparing 90-50th centiles of daily mean apparent temperature, a composite index accounting for both temperature and humidity. We conducted a sensitivity analysis to evaluate the impact of adjustment for ozone levels and different heat definitions. Results: Estimates of heat effects on average daily clinic visits among migrant farmworkers were positive (88.0%, 95% CI: 26.2% to 180.0%). We did not observe statistically significant associations between heat and clinic visits among other stratified groups. Conclusions: Our study appears to be the first to link heat effects with clinic data among migrant and seasonal farmworkers. This research suggests possible significant impact of heat on migrant farmworkers and provides justifications for further studies. [Description provided by NIOSH]
• Subjects:
  Agriculture Cardiovascular System Case Reports Farmers Health Care Facilities Workforce And Services Heat Stress Disorders Hot Temperature Humidity Occupational Health Race Factors Safety Temperature

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• Keywords:
  Agricultural-industry Agricultural-workers Biological-effects Cardiovascular-function Cardiovascular-system Case-studies Climatic-conditions Climatic-factors Health-care Heat Heat-acclimatization Heat-exposure Heat-stress Heat-stroke Heat-tolerance Information-systems Medical-services Racial-factors Seasonal-activity Temperature-effects

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• ISSN:
  1351-0711
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 6 ; Texas
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  324-328
• Volume:
  73
• Issue:
  5
• NIOSHTIC Number:
  nn:20047470
• Citation:
  Occup Environ Med 2016 May; 73(5):324-328
• Contact Point Address:
  Dr Kai Zhang, Department of Epidemiology, Human Genetics and Environmental Sciences, University of Texas School of Public Health, 1200 Pressler Street Room W606, Houston, TX 77030, USA
• Email:
  kai.zhang@uth.tmc.edu
• CAS Registry Number:
  Ozone (CAS RN 10028-15-6)
• Federal Fiscal Year:
  2016
• Performing Organization:
  University of Texas Health Science Center, Houston
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Occupational and Environmental Medicine
• End Date:
  20250630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:da541c465478eff89bcdbfe6df72afb1b16bae577399fad1de630e8178576df42e9b47f5e709489cab0d8bd2f7f02b8af90cfaf38b740c98a05c1f0732a35e7e
• Download URL:
  https://stacks.cdc.gov/view/cdc/202526/cdc_202526_DS1.pdf
• File Type:
  [PDF - 284.32 KB ]