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Intercommunity Comparison of Blood Lead Concentrations in Eeyou Istchee and Lead Shot Use as a Potential Exposure Source.

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slide1

Intercommunity Comparison of Blood Lead Concentrations in Eeyou Istchee and Lead Shot Use as a Potential Exposure Source

Ian Martin, Evert Nieboer, Leonard Tsuji and others (consortium of Laval, McGill, McMaster, and Waterloo Universities; and the Cree Board of Health and Social Services of James Bay)

Montreal, March 21-22, 2012

nituuchischaayihtitaau aschii history
Nituuchischaayihtitaau Aschii- History
  • Covel Report (2001)
  • Critical review of the Covel Report (June 2002)
  • Oujé-Bougoumou/Nemaska study: October-November 2002(report was published in 2005)
  • Needs and Feasibility Study: 2003-2004
  • Mistissini Pilot Study: 2005 (report in 2007)
  • Nituuchischaayihtitaau Aschii: 2007- Present
  • Eastmain/Wemindji Report (May 2011)
  • Project Final Report (by the end of 2012)
slide4

Highlights of Findings - Contaminants

Lead in Blood - 1

µmol/L

1.0 – Action Level for Other Adults

0.48 – Action Level for Children & Women 15-39

0.14 – CHISASIBI

0.22 – WHAPMAGOOSTUI

[GEOMs]

0.11 – WASKAGANISH / WEMINDJI / OUJÉ- BOUGOUMOU

0.10 – SOUTHERN QUEBEC POPULATION (2001)

0.09 – EASTMAIN / MISTISSINI / NEMASKA

0.06 – WASWANIPI

slide12

• Lead shot users have sig. elevated blood lead by 3 measures

• Only rank of lead level satisfies ANOVA assumption of equal variances

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• Elevated blood lead is a function of community of residence (community is more important than use of lead shot)

• Is the sharing of game killed with lead shot more responsible for elevated blood lead, as opposed to whether or not individuals hunt with lead shot?

slide14

• Odds ratio sig. > 1

• Relative risk (RR) of elevated lead for shot users = 2.9

slide15

• CA-1 a measure of: -Pb, -Hg, and + Cd

• CA-2 a measure of: +Cd, +Pb, and -Ni

• CA-3 a measure of: +Pb, and -Mo

• CA-4 a measure of: +Co, +Pb, and -Ni

slide16

• No interaction of hunt and smoke status

• For hunting, highest significant effects are CA-1 (-Pb, -Hg) and univariatePb

• (Hg in CA-1 reflects consumption of traditional foods, esp. fish)

• For smoking, highest significant effects are CA-1 (+Cd), CA-2 (+Cd, +Pb) and univariate Cd

conclusions
CONCLUSIONS
  • Blood lead varies between communities
  • Blood lead increases with age and gender( males > females)
  • Exposure risk higher if ‘using lead shot’; the latter constitutes a complex exposure variable (not only use of gun; eating bagged game is implied by factor/partial correlation analysis);smoking a source
  • A few children and some women of reproductive age exceeded the 0.48 µmol/L guideline; more of course if the new guideline of 0.24 µmol/L were adopted
slide19

• Low CA-1 scores reflect high consumption of traditional foods:more Pb, Hg, and less Cd

• High CA-2 scores may reflect minor variances in bear meat (and some market foods?)

• High CA-3 scores reflect high traditional fish, birds, organ meats, lard: more Pb

• Market vegetables & salad consumption reflected in lower Pb,Co,Cd (lower CA-2, CA-4)