Mortality estimates of zero


#1

I am working with a couple different sets of “model” data (monitor data that has been spatially interpolated in ArcMap). I do not have any issues loading the air quality fields into BenMAP but when I estimate health impacts, each mortality function estimates exactly zero (0.0000) incidences. All of the functions for other endpoints give me non-zero estimates, and I have used the same original monitor data in BenMAP (as monitor data, not model data) and have gotten non-zero mortality estimates.

I’ve come across this issue with both the previous and current version of the program.
Any suggestions are greatly appreciated!

Megan


(Neal) #2

Hi Megan,

I’m sorry to hear that you’re experiencing this issue.

Take a look at this post from back in April: Odd Error message or Null data when attempting to run a health impact equation

Let me know if this proves helpful.


#3

Hi Neal,

Thanks for getting back to me so quickly and linking to that post. It was useful but I’m seeing something slightly different and have included a screenshot of a simplified subset of my results. Looking at the output for the mortality functions, I have a delta of zero as well as a baseline incidence of zero. But when I examine the ER visits for the same data/analysis, the baseline incidence and delta values are populated. I am using the incidence rate files and HI functions included with the program.

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I re-uploaded my grid in an attempt to redo the crosswalks with the mortality dataset, but I still have a zero incidence rate. What else can I do to fix this?
What is more confusing to me is why the program is not using the air quality delta for the mortality functions. The input is a year’s worth of 24 hr PM2.5 averages, and it’s clearly calculating a delta that’s usable with the short term morbidity functions. It does not seem to be calculating/populating a Quarterly Mean, however.

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(Ali) #4

Megan, Whenever I’ve seen zero in the “baseline” column, the issue is usually that the incidence dataset isn’t crosswalked properly - HOWEVER in this case, you also have the DELTA as zero for mortality. I think something is up with air quality data file - my guess is that you need to add “QuarterlyMean” under the “Seasonal Metric” column. Let us know if that resolves the issue (or brings up another error)… Best, Ali


#5

Hi Ali,

I’ve tried a few different ways of formatting my data and including the “QuarterlyMean” label to see how the program would handle it, and none have worked. Even when I upload a file with four, non-zero quarterly mean values, the program still populates the quarterly mean value as zero. It continues to provide the range of D24HourMean values, though.

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