| Literature DB >> 33095253 |
Sangeetha Padalabalanarayanan1,2, Vidya Sagar Hanumanthu1,2,3, Bisakha Sen1,4.
Abstract
Importance: To cope with the continuing coronavirus disease 2019 (COVID-19) pandemic, state and local officials need information on the effectiveness of policies aimed at curbing disease spread, as well as state-specific characteristics, like the racial mix, associated with increased risks related to the disease. Objective: To investigate whether state-imposed stay-at-home orders (SAHOs) and the proportion of African American population in a state were associated with the state-level COVID-19 cases. Design, Setting, and Participants: This cross-sectional study used daily, state-level data on COVID-19 cases, tests, and fatalities from the COVID Tracking Project. Data from March 1 to May 4, 2020, for all states (except Washington state) as well as the District of Columbia were used. Exposures: The key exposure variables were state-level SAHO (1 if in place, 0 otherwise), and proportion of state population who are African American. Main Outcomes and Measures: The primary outcome was daily cumulative COVID-19 case rates. A secondary outcome was subsequent COVID-19 fatality rates, derived using mean cumulative fatality rates 21 to 28 days after each date. Multivariate regression models were estimated.Entities:
Mesh:
Year: 2020 PMID: 33095253 PMCID: PMC7584926 DOI: 10.1001/jamanetworkopen.2020.26010
Source DB: PubMed Journal: JAMA Netw Open ISSN: 2574-3805
Descriptive Statistics
| Variable | Mean (SD) [range], No. per 100 000 population |
|---|---|
| SAHO in place | 0.545 (0.498) [0-1] |
| African American, % | 11.081 (10.473) [0-45] |
| Daily cumulative rate | |
| Positive cases | 103.186 (200.067) [0-1639.561] |
| Tests | 744.23 (894.944) [0-6998.181] |
| Fatalities | 12.923 (21.737) [0-128.569] |
| Urban population | 74.002 (14.777) [38.66-100] |
| Nursing facilities | 5.647 (2.635) [1.98-13.851] |
| Total population | 64.842 (74.277) [5.788-395.122] |
| Asthma, % | 9.681 (1.226) [7.4-12.3] |
| Diabetes, % | 11.146 (1.905) [7-16.2] |
| Age >65 y, % | 16.477 (2.07) [11-21] |
| Poverty, % | 11.833 (2.817) [6.6-19.8] |
Abbreviation: SAHO, stay-at-home order.
Classified as 1 if in place, 0 otherwise (2020).
Defined as individuals under poverty level per state.
Figure 1. Cumulative Positive Case Counts and Case Rates by State
States are indicated by Federal Information Processing Standard (FIPS) codes.
Figure 2. Trends in Cumulative Positive Cases Reported by the State
For each state, day 1 is the first day when it reported a positive value for tests conducted. The state of Washington started reporting from January, and thus has a longer number of days than any other state and was omitted from the main analysis.
Multivariate Regression Analysis With State-Level Random Effects for Cumulative COVID-19 Case Rates and Subsequent Fatality Rates
| Variable | Model 1: Cumulative with FDFE (n = 3023) | Model 2: Cumulative without FDFE (n = 3023) | Model 3: Cumulative fatalities with FDFE (n = 3012) | Model 4: Cumulative fatalities without FDFE (n = 3012) | ||||
|---|---|---|---|---|---|---|---|---|
| β (95% CI) | β (95% CI) | β (95% CI) | β (95% CI) | |||||
| SAHO in place | −1.166 (−1.484 to −0.847) | <.001 | −1.170 (−1.487 to −0.853) | <.001 | −0.204 (−0.294 to −0.113) | <.001 | −0.204 (−0.295 to −0.114) | <.001 |
| African American, proportion of population | 0.045 (0.014 to 0.077) | .005 | 0.048 (0.019 to 0.077) | .001 | 0.068 (0.044 to 0.091) | <.001 | 0.064 (0.041 to 0.088) | <.001 |
| Log cumulative test rates | 0.615 (0.557 to 0.673) | <.001 | 0.615 (0.557 to 0.673) | <.001 | 0.165 (0.149 to 0.181) | <.001 | 0.165 (0.149 to 0.182) | <.001 |
| Mask order | −0.026 (−0.627 to 0.575) | .93 | −0.045 (−0.643 to 0.554) | .88 | −0.059 (−0.229 to 0.111) | .50 | −0.063 (−0.233 to 0.106) | .46 |
| Nursing facilities per 100 000 population | 0.043 (−0.078 to 0.165) | .49 | 0.061 (−0.051 to 0.172) | .29 | 0.092 (0.003 to 0.181) | .04 | 0.133 (0.043 to 0.224) | .004 |
| Total population | 0.005 (0 to 0.010) | .04 | 0.006 (0.002 to 0.009) | .005 | 0.004 (0.001 to 0.008) | .02 | 0.003 (0 to 0.006) | .05 |
| Urban population, % of total population | 0.037 (0.012 to 0.062) | .004 | 0.042 (0.020 to 0.064) | <.001 | 0.032 (0.014 to 0.050) | <.001 | 0.040 (0.022 to 0.058) | <.001 |
| Days | 0.433 (0.395 to 0.472) | <.001 | 0.434 (0.395 to 0.472) | <.001 | 0.077 (0.066 to 0.087) | <.001 | 0.077 (0.066 to 0.087) | <.001 |
| Days-squared | −0.005 (−0.006 to −0.005) | <.001 | −0.005 (−0.006 to −0.005) | <.001 | −0.001 (−0.001 to −0.001) | <.001 | −0.001 (−0.001 to −0.001) | <.001 |
| Asthma, % of total population | 0.197 (−0.070 to 0.464) | .15 | 0.253 (0.018 to 0.487) | .03 | 0.280 (0.085 to 0.475) | .005 | 0.363 (0.174 to 0.552) | <.001 |
| Diabetes, % of total population | 0.025 (−0.185 to 0.235) | .82 | −0.026 (−0.222 to 0.171) | .80 | −0.066 (−0.220 to 0.088) | .40 | −0.061 (−0.220 to 0.098) | .46 |
| Age >65 y, % of total population | 0.030 (−0.122 to 0.183) | .70 | 0.050 (−0.096 to 0.196) | .50 | 0.079 (−0.032 to 0.191) | .16 | 0.071 (−0.047 to 0.189) | .24 |
| Poverty, % of total population | −0.134 (−0.263 to −0.006) | .04 | −0.117 (−0.239 to 0.004) | .06 | −0.037 (−0.131 to 0.057) | .44 | −0.033 (−0.131 to 0.065) | .51 |
| Within | 0.71 | NA | 0.71 | NA | 0.68 | NA | 0.68 | NA |
| Between | 0.58 | NA | 0.53 | NA | 0.54 | NA | 0.48 | NA |
| ρ | 0.08 | NA | 0.08 | NA | 0.42 | NA | 0.46 | NA |
Abbreviations: FDFE, first date fixed effects; NA, not applicable; SAHO, stay-at-home order.
For each day in the sample, the subsequent cumulative fatality rates were operationalized using mean cumulative fatality rates 21 to 28 days after that date. Outcome variables were log-transformed, with values of 0 replaced with (1/10 million) prior to log transformation.
Estimated Cumulative Case Rates in Hypothetical Scenarios of No SAHOs and Full SAHOs
| Days since first reporting | Expected estimated value of cumulative case rate | |
|---|---|---|
| Without SAHOs | With SAHOs | |
| 1 | 0.083 | 0.025 |
| 5 | 0.418 | 0.130 |
| 10 | 2.497 | 0.775 |
| 15 | 11.572 | 3.592 |
| 20 | 41.618 | 12.920 |
| 25 | 116.144 | 36.057 |
| 30 | 251.511 | 78.081 |
| 35 | 422.632 | 131.206 |
| 40 | 551.078 | 171.082 |
| 45 | 557.582 | 173.101 |
Abbreviation: SAHO, stay-at-home order.
Log values were retransformed to levels using exponentiation to obtain estimated values.