Vedi qualcosa da migliorare? Proponi una modifica.
When Kentucky began reopening in May 2020, its leaders needed a plain answer to a hard question: how are we doing? The Kentucky Department for Public Health built one. From May 19, a daily indicator monitoring report combined five measures into a single composite score from 0 to 5, sent Monday through Saturday to about 90 decision-makers, from the governor's office to local health directors.
The five indicators
| Indicator | What it measured |
|---|---|
| Syndromic surveillance | the trend in hospital admissions, outpatient visits and emergency visits for COVID-like illness, for COVID diagnoses, and for influenza-like illness |
| Cases | new cases per 100,000 over two weeks (from low, 10 or fewer, to high, over 100) and whether the 7-day trend was rising |
| Deaths | deaths per 100,000 over two weeks (from low, 1.5 or fewer, to high, over 5) and their trend |
| Health care capacity | intensive care beds and ventilators in use, and the supply of N95 respirators |
| Contact tracing capacity | the share of contact tracing teams deployed in each of Kentucky's 16 public health regions |
Each indicator was scored 1 to 3, and the composite counted how many were rated excellent. The result mapped to advice: 5, reopen or remain open; 4, monitor and continue reopening; 3, caution and enhanced monitoring; 2, increase mitigation; 1 or 0, reopening is risky — slow down or close.
What it showed
Kentucky's first case came on March 6, 2020, followed by school closures, a halt to elective procedures, limits on nursing-home visits and, on March 22, the closure of nonessential businesses. Weekly cases peaked at 1,446 in the week of May 4, and phased reopening under the "Healthy at Work" plan began on May 9.
From May 19 to July 15, Kentucky reported 12,742 cases and 299 deaths; the median patient age was 41. The mean composite score was 2.5, and it worsened over the period: the score was a 3 or a 2 on 83 percent of days, and most days from June 17 to July 15 rated 2, the level that called for more mitigation. Cases kept rising, and emergency and hospital visits for COVID-like illness increased. The report supported mitigation such as the July 9, 2020, executive order requiring face coverings in certain settings.
Because every indicator carried equal weight, the composite sometimes stayed moderate even as case counts climbed.
Finding hot spots
On July 7, a score of 3 prompted a closer look at county maps. Bell County, low in cases until then, had crossed the hot-spot threshold of a 7-day average above 25 cases per 100,000. The regional epidemiologist confirmed that investigations had found four specific clusters, not community spread, and that contact tracing and quarantine had begun within 12 hours — so state resources could go elsewhere.
Could others use it?
The data are public, the analysis runs in spreadsheets and R, and the method is standardized, so other states and localities could adopt it. The authors note caveats: changes in reporting or care (such as telehealth) can shift the indicators; capacity measures miss factors like nurse staffing; the scoring changed after launch; contact tracing measures need refinement; and the scoring system itself still needs field validation.
Sources
Based on "Primary Indicators to Systematically Monitor COVID-19 Mitigation and Response — Kentucky, May 19–July 15, 2020," by Kate Varela, Benjamin Scott, Doug Thoroughman and colleagues (Kentucky Department for Public Health and CDC), Morbidity and Mortality Weekly Report (Early Release, August 25, 2020), Centers for Disease Control and Prevention; a work of the United States government in the public domain.
Licenza: CC0 1.0 (pubblico dominio) · Tratto da www.cdc.gov
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