tetano
Editor, Senior Moderator
Public Health
. 2020 Oct 21;S0033-3506(20)30457-1.
doi: 10.1016/j.puhe.2020.10.015. Online ahead of print.
Early mandated social distancing is a strong predictor of reduction in peak daily new COVID-19 cases
A I Qureshi[SUP] 1 [/SUP], M F K Suri[SUP] 2 [/SUP], H Chu[SUP] 3 [/SUP], H K Suri[SUP] 4 [/SUP], A K Suri[SUP] 4 [/SUP]
Affiliations
Abstract
Objectives: Mandated social distancing has been applied globally to reduce the spread of coronavirus disease 2019 (COVID-19). However, the beneficial effects of this community-based intervention have not been proven or quantified for the COVID-19 pandemic.
Study design: This is a regional population-level observational study.
Methods: Using publicly available data, we examined the effect of timing of mandated social distancing on the rate of COVID-19 cases in 119 geographic regions, derived from 41 states within the United States and 78 other countries. The highest number of new COVID-19 cases per day recorded within a geographic unit was the primary outcome. The total number of COVID-19 cases in regions where case numbers had reached the tail end of the outbreak was an exploratory outcome.
Results: We found that the highest number of new COVID-19 cases per day per million persons was significantly associated with the total number of COVID-19 cases per million persons on the day before mandated social distancing (β = 0.66, P < 0.0001). These findings suggest that if mandated social distancing is not initiated until the number of existing COVID-19 cases has doubled, the eventual peak would result in 58% more COVID-19 cases per day. Subgroup analysis on those regions where the highest number of new COVID-19 cases per day has peaked showed increase in β values to 0.85 (P < 0.0001). The total number of cases during the outbreak in a region was strongly predicted by the total number of COVID-19 cases on the day before mandated social distancing (β = 0.97, P < 0.0001).
Conclusions: Initiating mandated social distancing when the numbers of COVID-19 cases are low within a region significantly reduces the number of new daily COVID-19 cases and perhaps also reduces the total number of cases in the region.
Keywords: COVID-19; Mandated social distancing; Quarantine.
. 2020 Oct 21;S0033-3506(20)30457-1.
doi: 10.1016/j.puhe.2020.10.015. Online ahead of print.
Early mandated social distancing is a strong predictor of reduction in peak daily new COVID-19 cases
A I Qureshi[SUP] 1 [/SUP], M F K Suri[SUP] 2 [/SUP], H Chu[SUP] 3 [/SUP], H K Suri[SUP] 4 [/SUP], A K Suri[SUP] 4 [/SUP]
Affiliations
- PMID: 33317819
- DOI: 10.1016/j.puhe.2020.10.015
Abstract
Objectives: Mandated social distancing has been applied globally to reduce the spread of coronavirus disease 2019 (COVID-19). However, the beneficial effects of this community-based intervention have not been proven or quantified for the COVID-19 pandemic.
Study design: This is a regional population-level observational study.
Methods: Using publicly available data, we examined the effect of timing of mandated social distancing on the rate of COVID-19 cases in 119 geographic regions, derived from 41 states within the United States and 78 other countries. The highest number of new COVID-19 cases per day recorded within a geographic unit was the primary outcome. The total number of COVID-19 cases in regions where case numbers had reached the tail end of the outbreak was an exploratory outcome.
Results: We found that the highest number of new COVID-19 cases per day per million persons was significantly associated with the total number of COVID-19 cases per million persons on the day before mandated social distancing (β = 0.66, P < 0.0001). These findings suggest that if mandated social distancing is not initiated until the number of existing COVID-19 cases has doubled, the eventual peak would result in 58% more COVID-19 cases per day. Subgroup analysis on those regions where the highest number of new COVID-19 cases per day has peaked showed increase in β values to 0.85 (P < 0.0001). The total number of cases during the outbreak in a region was strongly predicted by the total number of COVID-19 cases on the day before mandated social distancing (β = 0.97, P < 0.0001).
Conclusions: Initiating mandated social distancing when the numbers of COVID-19 cases are low within a region significantly reduces the number of new daily COVID-19 cases and perhaps also reduces the total number of cases in the region.
Keywords: COVID-19; Mandated social distancing; Quarantine.