"Richard L. Canfield" <rlc5@cornell.edu> 

02/07/2008 06:04 PM



Please respond to

<rlc5@cornell.edu>



	

To

Jee-Young Kim/RTP/USEPA/US@EPA

cc

Mary Ross/RTP/USEPA/US@EPA, Deirdre Murphy/RTP/USEPA/US@EPA, Zachary
Pekar/RTP/USEPA/US@EPA, Karen Martin/RTP/USEPA/US@EPA, David
Svendsgaard/RTP/USEPA/US@EPA

Subject

minor correction









NOTE: My values for the 5-year-olds were off by a couple of hundredths;
see

the revised values in paragraph 2 below.

The mean concurrent blood lead concentration for the 86 3-year-olds with
a

peak (maximal) blood lead concentration of less than 10 micrograms per

deciliter through 3 years of age (which includes measures at 6, 12, 18,
24,

and 36 months) is 4.78, the SD is 1.98.

The mean concurrent blood lead concentration for the 71 5-year-olds with
a

peak (maximal) blood lead concentration of less than 10 micrograms per

deciliter through 5 years of age (which includes measures at 6, 12, 18,
24,

36, 48, and 60 months) is 3.32 (not 3.30), the SD is 1.64 (not 1.69).

Let me know if you want the values for cumulative bpb or any other

information.

Best regards,

Rick

 

 

_________________________________________

Richard L. Canfield, PhD

Division of Nutritional Sciences

B09 Savage Hall

Cornell University

Ithaca, NY 14853

 

office: 607-255-9575

fax:    607-255-1033

 

 

-----Original Message-----

From: Kim.Jee-Young@epamail.epa.gov
[mailto:Kim.Jee-Young@epamail.epa.gov] 

Sent: Thursday, February 07, 2008 5:05 PM

To: rlc5@cornell.edu

Cc: Ross.Mary@epamail.epa.gov; Murphy.Deirdre@epamail.epa.gov;

Pekar.Zachary@epamail.epa.gov; Martin.Karen@epamail.epa.gov;

Svendsgaard.David@epamail.epa.gov

Subject: Request for additional information on Canfield et al. (2003)

Dear Dr. Canfield,

As you may be aware, EPA is currently in the process of reviewing the

U.S. National Ambient Air Quality Standard for Lead and will be

announcing the proposed rule in April/May 2008.  The Air Quality

Criteria Document for Lead discusses your 2003 paper as one that showed

statistically significant associations in infants at blood lead levels

below 10 ug/dL.  The paper presents the concurrent mean blood lead level

for the all the children in the study as 5.8 ug/dL (SD 4.1 ug/dL).

Would you be able to provide us with information regarding the mean and

SD of the blood lead levels in the group of children with levels less

than 10 ug/dL?

The Pb NAAQS review is on a very tight court-ordered deadline.  We would

greatly appreciate your prompt response.

Sincerely yours,

Jee Young Kim, Sc.D.

U.S. Environmental Protection Agency

National Center for Environmental Assessment

Telephone:  919-541-4157

E-mail:  kim.jee-young@epa.gov

