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Apr 14, 2021 · Mask wearing has been advocated by public health officials as a way to reduce the spread of COVID-19 [3–5]. In the United States, policies on mask wearing have varied from state to state over the course of the pandemic . For the period of April 1 through October 31, 2020, less than half of states had issued a mandate for mask wearing in ...
- The Global Covid-19 Trends and Impact Survey
- Study Population
- Outcome Variable Definition
- Predictor Measurement
- Statistical Analysis
The CTIS is an ongoing repeated daily cross-sectional survey conducted by the University of Maryland (Global) and Carnegie Mellon University (US) in partnership with Facebook, Inc. It asks various questions related to symptoms, testing, preventive behaviors, mental health, and more. The UMD Global CTIS was launched on April 23, 2020 in > 200 countr...
This analysis included adult participants who responded to the UMD Global CTIS from April 23rd, 2020 until October 31st, 2020. We did not include responses from the US Symptom Survey in this analysis, as the question on face mask usage was not incorporated into the US questionnaire until September 2020. Since some of the 200+ countries and territor...
Our outcome was face mask usage, based on the survey question: “In the last 7 days, how often did you wear a mask when in public?” The response options were “All of the time”, “Most of the time”, “Some of the time”, “A little of the time”, “None of the time”, or “I have not been in public during the past 7 days”. We defined face mask usage as a bin...
We included several individual and country-level factors that could be associated with face mask usage based on a priori hypotheses and existing literature. Individual-level predictors included age, gender, standardized years of education, urbanicity (defined as living in a city versus town, village, or rural area), and the following reported socia...
In addition to examining descriptive statistics, a survey-weighted multivariable logistic regression model was used to formally assess whether individual and country-level factors were associated with mask-wearing. All statistical analyses were performed in R (version 4.0.3), using the R survey package (version 4.0) to account for the sampling desi...
- Elena Badillo-Goicoechea, Ting-Hsuan Chang, Esther Kim, Sarah LaRocca, Katherine Morris, Xiaoyi Deng...
- 2021
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The median daily COVID-19 case rate between 15 June and 1 July 2020 was 243 per 100 000. The five counties with the highest percentages of mask wearing were in California, Virginia, and Florida (average IRR score = 0.42; Table 2 ). The average IRR score for the bottom five counties was 0.55, or more rural.
- 10.22605/RRH6596
- 2021/07
Jul 17, 2020 · People wearing a face mask in public in France 2022, by age Percentage of U.S. adults who reported wearing a face mask Apr.-Jun. 2020, by age + Premium statistics
We have tested this improved mask by spraying the face of a mask-wearing manikin with colored as well as fluorescent dyes. We compared the test mask with other commonly used masks using an N95 respirator as reference standard. The test mask was able to stop the droplets and aerosols on the outer impervious layer sprayed at velocity of 180km/hr (1).
Apr 14, 2022 · Mask wearing has been advocated by public health officials as a way to reduce the spread of COVID-19. In the United States, policies on mask wearing have varied from state to state over the course of the pandemic. Even as more and more states encourage or even man-date mask wearing, many citizens still resist the notion. Our research examines ...
