Fw: Re: Urgent Request for Information from your 2008 study

Pradeep Rajan 

to: 

Tricia Crabtree 

12/17/2010 02:50 PM 

Show Details 

Pradeep Rajan, ScD 

Ambient Standards Group 

Health and Environmental Impacts Division 

Office of Air Quality Planning and Standards 

U.S. EPA 

mail code: C504-06 

RTP, NC 27711 

office: 919-541-2580 

fax: 919-541-0237 

email: rajan.pradeep@epa.gov

-----Forwarded by Pradeep Rajan/RTP/USEPA/US on 12/17/2010 02:50PM ----- 

To: Pradeep Rajan/RTP/USEPA/US@EPA 

From: Michelle Bell <michelle.bell@yale.edu> 

Date: 08/30/2010 11:35AM 

cc: Karen Martin/RTP/USEPA/US@EPA, Bryan Hubbell/RTP/USEPA/US@EPA, Beth HassettSipple/RTP/USEPA/US@EPA 

Subject: Re: Urgent Request for Information from your 2008 study 

Dear Pradeep: 

Attached is the data you requested from the Bell et al. AJE paper. 

This includes the county-specific number of CVD hospital admissions 

and respiratory admissions across the study period. The number of 

people at risk is provided at the county level as the average number 

per day. We include the counties' fips codes, state names, and 

county 

names. This data includes all days in the study period (1999-2005), 

although some days were omitted from analysis due to missing data 

(e.g., missing PM levels). 

Best, 

Michelle 

At 12:37 PM 8/20/2010, Rajan.Pradeep@epamail.epa.gov wrote: 

>Dear Dr. Bell, 

> 

>In our continuing review of the US PM standards, we were asked by 

>our CASAC to consider how the findings of epidemiological studies 

>might be used in considering a range of levels for a NAAQS. As 

part 

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>of this effort they have encouraged us to consider information on 

>the concentrations that were most influential in generating the 

>health effect estimates reported in individual studies. 

> 

>Consequently, we are interested in examining the distribution of 

>PM2.5 concentrations in conjunction with the number of 

>cardiovascular and respiratory admissions among the cohort members 

>included in your published study "Seasonal and regional short-term 

>effects of fine particles on hospital admissions in 202 U.S. 

>counties, 1999-2005". 

> 

>Specifically, if available, we interested in receiving from you 

>county-specific number of cardiovascular and respiratory admissions 

>and the county-specific number of participants for each of the 202 

>counties included in your analysis of the MCAPS cohort across the 

>entire study time period. 

> 

>If you find that is not feasible to provide us with the 

>county-specific number of admissions for this study we would 

>appreciate receiving just the county-specific number of study 

>participants across the entire study period. 

> 

>We anticipate that this information would provide us with an 

>understanding of the distribution of PM2.5 concentrations linked 

>with the health effect among your study population and therefore an 

>indication of which PM2.5 concentrations are likely to be most 

>influential in generating the reported health effect estimates. 

> 

>Thanks in advance for your help! 

> 

>Pradeep Rajan 

> 

> 

>Pradeep Rajan, ScD 

>Ambient Standards Group 

>Health and Environmental Impacts Division 

>Office of Air Quality Planning and Standards 

>U.S. EPA 

>mail code: C504-06 

>RTP, NC 27711 

>office: 919-541-2580 

>fax: 919-541-0237 

>email: <mailto:rajan.pradeep@epa.gov>rajan.pradeep@epa.gov 

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