What Data Should You Be Following to Understand COVID-19 in North Carolina?
Update for Sept. 18, 2020:
North Carolina’s seven-day rolling average of the percent of new positive COVID-19 cases continues to trend down. This week we’re seeing the percent positive hover around the 5% mark — which is what officials at NCDHHS and Gov. Cooper are looking for. Testing has been in the 5% to 6% range for a week or two now, but not under 5% for more than just a day or two.
Unfortunately, we’re seeing slight increases in both the seven-day rolling averages of hospital capacities and deaths. Now, the caveat with hospitalizations is that capacity includes other illnesses — so for example on any given day capacity could be at 70%, but only a fraction of that capacity could be due to COVID-19 patients. Breaking it down though, the seven-day rolling average of capacities for both ICU and inpatient beds remain under 60%
We’ll continue to follow the data, where they lead us. Having this data at our fingertips allows us to make the best decisions for ourselves and our families.
On a daily basis, we’re being flooded with information and data about new cases, hospitalizations, and deaths from COVID-19. We need to listen and watch the signals that data tells us while also tuning out the noise.
To do that, there are three key metrics to watch:
· The seven-day rolling average of the percentage of new positive COVID-19 tests
· The seven-day rolling average of daily death numbers
· The seven-day rolling average of hospital capacity
We’re committed to using clearly sourced data, no matter what story they tell us — good, bad, or ugly. We need to watch it all so you can make informed decisions about returning to school or visiting loved ones who are at a higher risk for contracting COVID-19.
The graphs below help cut through the noise of the daily headlines talking about “records” or “increased cases.” We need to know what the state is facing without the noise of social media. Just the facts.
Seven-day rolling average of the percentage of new positive COVID-19 tests
Why is this important? This number gives us a signal of how the virus is spreading in North Carolina. It’s a clear way for us to understand the trends of positive cases in the state while cutting through the headlines about increased testing.
NOTE: On Aug. 12, NCDHHS announced that 221,444 tests were mistakenly added to the total of North Carolina’s tests. The tests did not impact the total number of positive tests but did impact the cumulative total of tests conducted. After doing an analysis of the corrected data and what had previously been reported, the 7-day rolling average did not shift substantially. That is one of the reasons why the 7-day rolling average is such an important metric. It allows us to see beyond any mistakes in the data.
Seven-day rolling average of daily death numbers
Why is this important? Watching this number gives us a sense of just how lethal the virus strain is and whether our efforts are helping or hurting. This, at times, can be a lagging indicator as deaths take time to be reported and investigated. According to DHHS, death data for the last two weeks may not be reported yet, which is data for that time period can fluctuate.
Seven-day rolling average of hospital capacity
Why is this important? Watching hospital capacity gives us a look at how serious cases are and if our hospitals are going to be overtaxed. One of the reasons Gov. Cooper shut down the state earlier this year was because he and Secretary Cohen were concerned that COVID-19 would overtake our hospitals. The concern was so great that eventually they put up additional triage spaces and make-shift hospitals to increase capacity. We never maxed out the hospitals. We know the most serious cases of COVID-19 end up in the hospital. But, capacity doesn’t capture only COVID cases, capacity is for ALL hospitalizations, including COVID patients.
This data will continue to change as the pandemic continues. That means we’ll continue to update these stats as we go along and add additional metrics we think are important. Please check back here a couple of times a week to see where North Carolina stands. If you have other key indicators that you’re watching, please share and let us know.