Langley BC Cancer Clusters

917 views

Published on

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
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
917
On SlideShare
0
From Embeds
0
Number of Embeds
17
Actions
Shares
0
Downloads
2
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Langley BC Cancer Clusters

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

×