Colorado Results
Cases of COVID-19 : In the five Colorado counties with active oil and gas production sites , the number of observed cumulative cases was higher than expected in three of the counties and lower than expected in two ( Figure 1 ). People aged 20-29 years and Hispanics in Colorado were experiencing a disproportionately greater incidence of COVID-19 . Because Colorado county populations differ in age and ethnicity distribution ( Figures 2 and 3 ), we adjusted the results to account for the proportion of COVID-19 vulnerable groups . Although impacts were minor , adjusting these results for race impacted the estimated number of expected cases more than adjusting for age . As shown in Table 2 , race-adjusted SIRs in Adams , Garfield , and Weld counties exceeded one , indicating higher-than-expected numbers of cumulative COVID-19 cases ; those are 1.35 ( 95 % CI 1.33 , 1.38 ), 1.25 ( 95 % CI 1.18 , 1.33 ), and 1.13 ( 95 % CI 1.09 , 1.16 ). In LaPlata and Broomfield counties , raceadjusted SIRs are 0.45 ( 95 % CI 0.40 , 0.50 ) and 0.92 ( 0.85 , 0.98 ). These rates , which fell at less than one , indicate that the observed number of cumulative COVID cases in these two counties was below the expected numbers based on statewide rates . >>
Figure 1
Figure 2
Figure 3
Table 2 : Standardized COVID-19 Incidence Ra : os for Colorado Coun : es with Ac : ve Oil and Gas Produc : on 1
County |
SIR ( 95 % CI ) |
SIR ( 95 % CI ) |
|
|
Adjusted for Age |
SIR ( 95 % CI ) Adjusted for Race
Adams 1.52 ( 1.49 , 1.56 ) 1.54 ( 1.51 , 1.56 ) 1.35 ( 1.33 , 1.38 ) Broomfield 0.77 ( 0.71 , 0.82 ) 0.76 ( 0.71 , 0.82 ) 0.92 ( 0.85 , 0.98 ) Garfield 1.23 ( 1.16 , 1.31 ) 1.26 ( 1.18 , 1.34 ) 1.25 ( 1.18 , 1.33 ) LaPlata 0.39 ( 0.35 , 0.43 ) 0.40 ( 0.35 , 0.44 ) 0.45 ( 0.40 , 0.50 ) Weld 1.17 ( 1.13 , 1.19 ) 1.42 ( 1.38 , 1.45 ) 1.13 ( 1.09 , 1.16 )
PHYSICIANS FOR SOCIAL RESPONSIBILITY | WWW . PSR . ORG
CI = confidence interval , SIR = Standardized Incidence Ra5o 1Compared to Colorado popula5on
AIR POLLUTION-COVID REPORT | 9