Indicators Program Covid-19 in Iowa: Four Months of Cases ... · 3The Iowa Department of Public...
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Indicators Program Covid-19 in Iowa: Four Months of Cases by Age Covid-19 1 cases have been reported in Iowa since early March, 2020. This report reviews week-by- week changes in reported cases and examines changes by age as well. Although cases are reported on a daily basis, 2 there are day-by-day variations in reporting and testing that include weekends and holidays that make it useful to aggregate cases on a weekly basis to look at trends. The source of the information reviewed here is the Iowa Department of Public Health. 2 Since early March, Iowa has reported more than 37,900 Covid-19 cases in the state (Table 1). The cases reported in Iowa increased weekly from early March until early May after which weekly new cases declined for the seven following weeks through mid- June (Figure 1, Table 1). However, with the week of June 20th, reported weekly cases increased again through the recent weeks included here. In the most recent two-week period, the weekly new cases have exceeded or been near the previous high weekly total during the week of April 25th. After the first several weeks of March, the number of reported cases increased in each age group, although the number and proportion of cases in the youngest age group (0-17) grew most slowly (Figures 2 - 3, Table 1). The weekly cases for the combined three age groups of those age 18 through age 80 peaked during the week of April 25th; the peak for those 81 or older was a week later. After these initial peaks, the number of new cases during the following weeks generally declined across most of the age groups through the middle of June. The week of June 20th marked the return of case increases across most age groups which have generally stayed at higher levels through the recent weeks reported here. The total cases reported during the week of July 4th (3,605) was a new weekly high. For those age 17 or younger, the weekly case numbers and percentages are at levels higher than in the earlier weeks. The cases for the youngest age group has trended upward such that, along with those age 18 - 40, they have accounted for higher proportions of new cases from June onward. For new cases in June through July, persons age 40 or
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Indicators Program
Covid-19 in Iowa: Four Months of Cases by Age
Covid-191 cases have been reported in Iowa since early March, 2020. This report reviews week-by-week changes in reported cases and examines changes by age as well. Although cases are reported on a daily basis,2 there are day-by-day variations in reporting and testing that include weekends and holidays that make it useful to aggregate cases on a weekly basis to look at trends. The source of the information reviewed here is the Iowa Department of Public Health.2
Since early March, Iowa has reported more than 37,900 Covid-19 cases in the state (Table 1). The cases reported in Iowa increased weekly from early March until early May after which weekly new cases declined for the seven following weeks through mid-June (Figure 1, Table 1). However, with the week of June 20th, reported weekly cases increased again through the recent weeks included here. In the most recent two-week period, the weekly new cases have exceeded or been near the previous high weekly total during the week of April 25th.
After the first several weeks of March, the number of reported cases increased in each age group, although the number and proportion of cases in the youngest age group (0-17) grew most slowly (Figures 2 - 3, Table 1). The weekly cases for the combined three age groups of those age 18 through age 80 peaked during the week of April 25th; the peak for those 81 or older was a week later. After these initial peaks, the number of new cases during the following weeks generally declined across most of the age groups through the middle of June.
The week of June 20th marked the return of case increases across most age groups which have generally stayed at higher levels through the recent weeks reported here. The total cases reported during the week of July 4th (3,605) was a new weekly high.
For those age 17 or younger, the weekly case numbers and percentages are at levels higher than in the earlier weeks. The cases for the youngest age group has trended upward such that, along with those age 18 - 40, they have accounted for higher proportions of new cases from June onward. For new cases in June through July, persons age 40 or
Covid-19 in Iowa: Four Months of Cases by Age
Iowa State University Extension and Outreach Indicators Portal: www.indicators.extension.iastate.edu
Sandra Charvat Burke Iowa State UniversityAmes, IA [email protected], 2020
This institution is an equal opportunity provider. For the full non-discrimination statement or accommodation inquiries, go to www.extension.iastate.edu/diversity/ext
Notes1Coronavirus disease 2019 (COVID-19) is defined as illness caused by a novel coronavirus now called severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2; formerly called 2019-nCoV) https://www.medscape.com/answers/2500114-197401/what-is-covid-19 2Through the months that COVID-19 cases have been reported in Iowa, the Iowa Department of Public Health has utilized several methods of reporting the cases and testing in Iowa. These include press reports, web sites, data tables and files, mapping, and graphing. The data in this report have been gathered from a number of these methods. Several web sites directly from or affiliated with the Iowa Department of Public Health have been used. These include: https://www.idph.iowa.gov/; https://idph.iowa.gov/Emerging-Health-Issues/Novel-Coronavirus; https://coronavirus.iowa.gov/;https://coronavirus.iowa.gov/pages/access; https://open-iowa.opendata.arcgis.com/datasets/iacovid19-demographics; and https://open-iowa.opendata.arcgis.com/datasets/ia-covid19-cases3The Iowa Department of Public Health reports an analysis of both cases and deaths by age group and pre-existing conditions. This reporting shows that persons age 61-80 along with those age 81 or older account for approximately 16% of COVID-19 cases in Iowa while accounting for approximately 87% of deaths in Iowa. See: https://coronavirus.iowa.gov/pages/case-counts; https://coronavirus.iowa.gov/pages/outcome-analysis-deaths
Table 1. Number and Percentage of Covid-19 Cases by Age, March – July, 2020, Iowa.1
Number of Weekly Covid-19 Cases by Age Percentage of Weekly Covid-19 Cases by Age
Week All
Ages Age 0-17
Age 18-40
Age 41-60
Age 61-80
Age 81 or Older
Age 0-17
Age 18-40
Age 41-60
Age 61-80
Age 81 or Older
March 07 - March 13 15 0 0 3 12 0 0.0 0.0 20.0 80.0 0.0 March 14 - March 20 53 1 18 22 12 0 1.9 34.0 41.5 22.6 0 March 21 - March 27 230 0 69 77 74 10 0.0 30.0 33.5 32.2 4.3 March 28 - April 03 488 7 131 183 129 38 1.4 26.8 37.5 26.4 7.8 April 04 - April 10 724 9 262 296 122 33 1.3 36.3 41.0 16.9 4.7 April 11 - April 17 1003 18 334 395 183 75 1.8 33.2 39.4 18.2 7.4 April 18 - April 24 2579 26 1155 1004 289 105 1.0 44.8 38.9 11.2 4.1 April 25 - May 01 3549 102 1549 1319 428 146 2.9 43.6 37.2 12.1 4.2 May 02 - May 08 3030 70 1267 1019 385 177 3.4 42.9 34.7 13.1 5.9 May 09 - May 15 2657 128 1185 983 351 127 3.8 43.5 36.0 12.1 4.6 May 16 - May 22 2467 143 1084 745 366 129 5.8 43.9 30.2 14.8 5.2 May 23 - May 29 2347 136 1092 770 255 88 5.9 46.6 32.8 10.9 3.8 May 30 - June 05 2296 167 1127 704 232 66 7.3 49.1 30.7 10.1 2.9 June 06 - June 12 2117 169 1158 548 194 50 8.0 54.7 25.9 9.1 2.4 June 13 - June 19 1869 147 1012 468 185 58 7.9 54.1 25.0 9.8 3.1 June 20 - June 26 2509 150 1537 524 260 38 6.0 61.3 20.9 10.4 1.5 June 27 - July 03 2990 248 1767 619 262 93 8.3 59.1 20.7 8.8 3.1 July 04 - July 10 3605 304 1949 824 409 116 8.5 54.1 22.9 11.3 3.2 July 11 - July 17 3376 305 1713 822 406 131 9.0 50.7 24.3 12.0 3.9 All Weeks Totals 37904 2130 18409 11325 4554 1480 5.6 48.6 29.9 12.0 3.9 1Source: Iowa Department of Public Health
younger accounted for 60 percent or more of all new cases.
There has been a resurgence of cases for the two oldest age groups as well in recent weeks. Although not yet reach-ing the weekly case numbers of early May, any increase for these age groups is concerning because these patients tend to have pre-existing conditions that complicate their recovery lead-ing to lower survival rates.3 Currently for Iowa, cases remain at high levels across all age groups and overall have returned to the case levels of the initial surge weeks.
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