Pa.’s death toll lag in Philadelphia highlights state’s ongoing struggle to compile timely data
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HARRISBURG — Philadelphia’s health department continues to report a drastically higher COVID-19 death toll than Pennsylvania’s official number, one of the clearest examples of the state health department’s challenges in compiling timely information about the virus.
For weeks, state officials have cited obstacles in reporting COVID-19 data. They have blamed counties for lags in providing information to the state, along with issues in “data reconciliation” — such as delays caused by software upgrades, troublesome algorithms, and a wonky web of disjointed technologies.
Over the past weeks, as Philadelphia’s own Public Health Department reported a high and rising number of deaths caused by the coronavirus, the state health department’s count for the city remained stuck at a much lower number.
That changed Wednesday, when the state’s total count surged overnight by 479 deaths, which Health Secretary Rachel Levine said was due in large part to yet another influx of weeks-old data being “reconciled” from a number of sources.
About a third of the count in last week's surge represented deaths of Philadelphia residents, raising the state’s total toll for the city from 276 to 424 overnight.
“[W]e are happy to see our numbers are coming together,” James Garrow, a spokesman for the Philadelphia Department of Public Health, said Wednesday. The discrepancies, Garrow said, had been “definitely causing confusion.”
The number from the state, 424, held steady on Thursday and Friday, then dropped by two on Saturday. On Sunday, the state was reporting 423 deaths in Philadelphia. On Monday, the number was back to 424.
Meanwhile, the city’s own tally rose to 607, then 638 on Friday and 705 on Saturday. On Monday, the city health department listed the total as 726 on its website.
In Pennsylvania, just six counties, including Philadelphia, have their own health departments. These counties perform their own COVID-19 case investigations and release counts on their own websites.
Some count discrepancies are inevitable, county and state officials said, because of reasonable lag times and issues with comparing and vetting the data.
What’s been less clear, though, is why Philadelphia’s self-reported number remains so much higher than the state’s total. The situation is an outlier compared with Pennsylvania’s other county-run health departments.
In Montgomery County, the local count is lower than the state’s, though the discrepancy is not as severe as in Philadelphia. The other county departments — Allegheny, Bucks, Chester, and Erie — have shown numbers largely aligned with the state.
On Tuesday, Nate Wardle, a spokesperson for the state Health Department, told Spotlight PA that “county health departments, coroners, hospitals and other providers” report deaths to the state.
“And while we request the counties to provide us with their numbers, they are not required to do so,” he said. “Because of that, there may be a lag time between the county reporting its own numbers and subsequently sending them to the state to include in its data.”
But Philadelphia is regularly sending the state data on its deaths.
Twice a week, they pass along what’s called, in public health lingo, a “line list” (basically, an Excel spreadsheet) with death information to the state. The list “encompasses all of the [COVID-19] deaths that we know of,” Garrow said.
The onus is then on the state to take the information Philadelphia sends and “reconcile” it into PA-NEDSS, the system Pennsylvania uses to track disease surveillance.
When asked why the city is sending information only twice a week, not daily, Garrow said they had been working to find the right frequency, so as not to overwhelm the state health department. The state, Garrow said, is inputting the data into the system manually.
“To their credit, they’re trying to get it right,” Garrow added.
Wardle did not provide specifics on what the state does with Philadelphia’s line list. Instead, he offered a broad response about the state working with the city’s department “to get information.”
“At this time, we are receiving COVID-19 deaths from them and working to reconcile those deaths into the other data that we are working to reconcile,” Wardle said.
Levine has spoken repeatedly about issues the state has faced while reconciling data from different sources.
On Wednesday, she said the day’s update included “data matched from our Electronic Death (Registration) System over the past 10 days.”
That system, referred to as EDRS, is managed by the Pennsylvania Health Department’s Bureau of Health Statistics and Registries. The department denied Spotlight PA’s request to speak to the director of the bureau.
Since March 6, Pennsylvania has required the state’s on-the-ground death reporters — physicians, coroners and medical examiners — to use EDRS when certifying deaths attributed to the virus.
This requirement is important because, according to a state health department document, EDRS is the system the bureau uses to report daily COVID-19 death information to the Centers for Disease Control and Prevention.
Still, PA-NEDSS is the sole system listed on the state’s official COVID-19 web page as the source of its coronavirus data.
Technical issues with the two systems have caused serious problems for the state.
In mid-April, when the state’s reporting of Philadelphia’s deaths started to lag behind those of the city, officials blamed delays on an upgrade to the EDRS software.
Last week’s spike in the death count was attributed to issues with algorithms that automate the process of moving data from EDRS to PA-NEDSS.
When Spotlight PA asked to examine the code behind the algorithms, the department declined the request.
Despite the state’s efforts to reconcile COVID-19 death data, officials have decided to leave out a category that experts said is dangerous to ignore: probable deaths.
A “probable death” refers to one where a physician, medical examiner or coroner certifies that there’s clinical evidence of COVID-19, but no test was administered to confirm the presence of the virus.
The state added those deaths into their official count last month, only to rescind more than 200 of them two days later.
Pennsylvania’s removal of probable deaths was a split from CDC guidance, first issued in early April. The guidance said it is a legitimate, accepted practice to report a COVID-19 death as “probable” if the death was likely to have been caused by the virus but a test could not be performed.
The state said it removed probable deaths, a category Levine said “can be confusing” for the public, because more investigation was needed. (Adding to the confusion is the fact that Pennsylvania’s count does still include probable cases that become deaths — meaning individuals were reported officially to the state as likely to have the virus before they died.)
“At times, there are things we need to review, and potentially revisit the way the data is being analyzed,” Levine said last week of the situation. “And this is one of those times.”
In the days following, Spotlight PA repeatedly asked the department about its analysis and the decision to remove many deaths from the count. Wardle responded: “In our attempt to do daily reporting, we ran queries that had incorrect data.”
He declined to specify what exactly about the data was determined to be incorrect.
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