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Langley BC Cancer Clusters
Langley BC Cancer Clusters
Langley BC Cancer Clusters
Langley BC Cancer Clusters
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Langley BC Cancer Clusters

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Presentation from Fraser Health Authority/BC Cancer Agency research staff on child cancer rates in Langley, BC, Canada. There is no cluster.

Presentation from Fraser Health Authority/BC Cancer Agency research staff on child cancer rates in Langley, BC, Canada. There is no cluster.

Published in: Health & Medicine
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Transcript

  • 1. Walnut Grove Community Cancer Concern Do rates of any of the childhood cancers suggest a clustering due to some (as yet unknown) factor?
  • 2. Method
    • Assessment
    • Compare rates – Community vs BC Population
    • Period 1998-2007
    • Rate Need data on # people & # cases for each year
    • BC: Census data (# of people)
    • BC Cancer Registry (# of cases)
    • Community: Data not available
    • Solution - Use larger administrative region where data available
    • Langley Local Health Area (Youth Pop: ~ 18,000)
    • Ratio Number cases (O) / expected based on BC rate (E)
  • 3. Results (1998-2007)
    • - All cancers
    • E = 49.91 cases
    • O = 51 cases
    • Ratio = O/E = 1.02
    • Yearly data
    • Lower rate 6 years out of 10
    • Large random variation
    • NO EXCESS RISK
  • 4. Results: Subset analyses
    • Gender
    • Males: O = 36 E = 27.28 Ratio = 1.32 Lower rate 4 years out of 10
    • Females: O = 15 E = 22.64 Ratio = 0.66 Lower rate 8 years out of 10
    • Site Specific
    • Leuk: O = 13 E = 13.24 Ratio = 0.98 Lower rate 5 years out of 10
    • Lymp: O = 7 E = 7.62 Ratio = 0.92 Lower rate 5 years out of 10
    • Brain: O = 4 E = 9.69 Ratio = 0.41 Lower rate 8 years out of 10
    • Others: O = 27 E = 19.35 Ratio = 1.40 Lower rate 6 years out of 10
    • Changes within normal range of random variation
    • CONCLUSION: Essentially no evidence to suggest a cluster of any cancer which
    • might be due to an unknown exposure.

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