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Exposures from Oil and Gas Development and Childhood Leukemia Risk in Colorado: A Population-Based Case-Control

Lisa M McKenzie1, William B Allshouse1, David R Johnson2

  • 1Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado Anschutz Medical Campus, Aurora, Colorado.

Cancer Epidemiology, Biomarkers & Prevention : a Publication of the American Association for Cancer Research, Cosponsored by the American Society of Preventive Oncology
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This summary is machine-generated.

Children living near oil and gas sites face higher risks of acute lymphoblastic leukemia (ALL). Proximity to these sites, especially within 5 km, significantly increases childhood leukemia risk, indicating current safety setbacks may be insufficient.

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Area of Science:

  • Environmental Health
  • Epidemiology
  • Pediatric Oncology

Background:

  • Children in areas with upstream oil and natural gas (O&G) operations may be exposed to leukemogens.
  • This exposure is linked to an increased risk of acute lymphoblastic leukemia (ALL).

Purpose of the Study:

  • To investigate the association between upstream O&G activity and childhood ALL risk in Colorado.
  • To evaluate the effectiveness of current residential setbacks from O&G well sites.

Main Methods:

  • A case-control study involving 451 children diagnosed with ALL and 2,706 matched controls in Colorado (1992-2019).
  • Estimation of upstream O&G activity intensity using an intensity-adjusted inverse distance weighted (IA-IDW) model from conception through a 10-year latency.
  • Logistic regression models were used to assess the relationship between ALL and IA-IDW, adjusting for confounders.

Main Results:

  • Children living within 5 km of an O&G well site showed increased ALL risk across low, medium, and high IA-IDW groups (ORs ranging from 1.62 to 2.00).
  • Within 13 km, increased ALL risk was observed for all IA-IDW groups (ORs ranging from 1.40 to 2.64).
  • The highest risk was associated with proximity to O&G well sites and higher exposure intensity.

Conclusions:

  • Colorado children residing within 13 km of O&G well sites face elevated ALL risk, with the greatest risk observed within 5 km.
  • Current regulatory setbacks between O&G well sites and residences may be inadequate for protecting children's health.
  • Findings support policy development to mitigate childhood leukemogen exposures.