Disability Prevalence Report

Acknowledgement

Special thanks to the following individuals who have contributed to the success of this effort: Deb Brucker, Erin Dame, Adam Lavoie, Rachel Coleman, Kate Filanoski, and Karen Volle. 

Funding for this publication is made possible by:

The Rehabilitation Research and Training Center on Disability Statistics and Demographics (StatsRRTC), funded by the U.S. Department of Health and Human Services Administration for Community Living National Institute on Disability, Independent Living, and Rehabilitation Research (NIDILRR), grant number 90RT5022-02-01; and the Rehabilitation Research and Training Center on Employment Policy and Measurement (EPM-RRTC), also funded by NIDILRR, grant number 90RT5037-01-00. The information developed by the StatsRRTC and EPM-RRTC does not necessarily represent the policies of the Department of Health and Human Services, and you should not assume endorsement by the Federal Government (Edgar, 75.620 (b)).

The StatsRRTC and EPM-RRTC are part of the Institute on Disability at the University of New Hampshire. The Institute on Disability/UCED (IOD) was established in 1987 to provide a university-based focus for the improvement of knowledge, policies, and practices related to the lives of people with disabilities and their families and is New Hampshire’s University Center for Excellence in Disability (UCED). Located within the University of New Hampshire, the IOD is a federally designated center authorized by the Developmental Disabilities Act. Through innovative and interdisciplinary research, academic, service, and dissemination initiatives, the IOD builds local, state, and national capacities to respond to the needs of individuals with disabilities and their families.

 

 

 
 
 
 

Institute on Disability / UCED
10 West Edge Drive, Suite 101
Durham, NH 03284
603.862.4320 | relay: 711 | contact.iod@unh.edu
www.iod.unh.edu

2015 Iowa Report for County-level Data: Prevalence

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rehabilitation Research and Training Center on
Disability Statistics and Demographics
A NIDILRR-Funded Center

   NIDILIRR.jpg

 

Introduction

The State Reports for County-Level Data on Prevalence are designed to provide the users of disability statistics with the number of people with disabilities for any given state and county in the United States (U.S.). This report is intended to be an online compliment to Section 1: Population and Prevalence of the Annual Disability Statistics Compendium and Annual Disability Statistics Supplement, providing greater detail within each state. The State Reports for County-Level Data on Prevalence can be used to compare county-level statistics between counties in any given state or states. The following report provides county-level statistics for Iowa.

The proportions of people with disabilities, sometimes called prevalence, presented in the State Reports for County-Level Data is a useful tool for advocates, researchers, and policy-makers to plan and provide services and supports for people with disabilities. In this report, the prevalence of people with disabilities is presented as the number of people with disabilities in a given state and county per total state and county populations, respectively. Counts and percentages are provided in tables and maps.

The data for this report comes from the American Community Survey 5-year data. The American Community Survey (ACS) is a national survey developed by the U.S. Census Bureau to provide information on a number of topics about social, economic, and demographic characteristics of the U.S. population. ACS 5-year data is collected over a longer period of time than 1-year data, providing larger sample sizes and increased reliability for less populated areas and small population subgroups. All of the statistics in this report use the ACS 5-year data which includes data from 2015, the year of the report, and data from the four previous years.

In the ACS, people are identified as having a disability based on responses to a series of six questions asking about having difficulties with vision, hearing, ambulation, cognition, self-care, and independent living. These questions are:

  • Are you blind or do you have serious difficulty seeing, even when wearing glasses?

  • Are you deaf or do you have serious difficulty hearing?

  • Do you have serious difficulty walking or climbing stairs?

 
  • Because of a physical, mental, or emotional condition, do you have serious difficulty concentrating, remembering, or making decisions?

  • Do you have difficulty dressing or bathing?

  • Because of a physical, mental, or emotional condition, do you have difficulty doing errands alone such as visiting a doctor's office or shopping?

A response of ‘yes’ to any one of these six questions identifies an individual as having a disability in the ACS. Specific to Iowa, the state chosen for this report, sentences providing interpretation and context for prevalence statistics are included below. A short glossary of terms is also provided at the end of the report explaining the statistics that are illustrated in each sentence.

Interpretation

The following statements are designed to help understand the 2015 county-level statistics from Iowa that are presented:

  • For people with and without disabilities: 

    • The range of total people across Iowa counties, also known as the difference between the largest and smallest counts of people across Iowa counties, was 443,622.

      • The county with the greatest number of total people was Polk (447,444 people).

      • The county with the least number of total people was Adams (3,822 people).

    • The average number of total people across all counties was 30,799.

    • The median, also known as the middle-most number, of total people across Iowa counties was 15,093.

 
  • For people with disabilities: 

    • The range of people with disabilities across Iowa counties, also known as the difference between the largest and smallest counts of people with disabilities across Iowa counties, was 46,190.

      • The county with the greatest number of people with disabilities was Polk (46,791 people).

      • The county with the least number of people with disabilities was Adams (601 people).

    • The average number of people with disabilities across all counties was 3,559.

    • The median, also known as the middle-most number, of people with disabilities across Iowa counties was 1,996.

  • For people without disabilities: 

    • The range of people without disabilities across Iowa counties, also known as the difference between the largest and smallest counts of people without disabilities across Iowa counties, was 397,432.

      • The county with the greatest number of people without disabilities was Polk (400,653 people).

      • The county with the leastnumber of people without disabilities was Adams (3,221 people).

    • The average number of people without disabilities across all counties was 27,240.

    • The median, also known as the middle-most number, of people without disabilities across Iowa counties was 13,226.

 

Prevalence of People with and without Disabilities for Iowa, by County: 2015

County Total Disability No Disability   County Total Disability No Disability
Count % Count % Count % Count %
Iowa          3,049,107 352,372 11.6 2,696,735 88.4 Davis             8,627   1,081 12.5     7,546 87.5
Adair             7,287   1,135 15.6     6,152 84.4 Decatur           8,140   1,466 18.0     6,674 82.0
Adams             3,822     601 15.7     3,221 84.3 Delaware         17,342   2,023 11.7    15,319 88.3
Allamakee        13,753   1,583 11.5    12,170 88.5 Des Moines       39,707   5,605 14.1    34,102 85.9
Appanoose        12,538   1,996 15.9    10,542 84.1 Dickinson        16,758   2,449 14.6    14,309 85.4
Audubon           5,719     723 12.6     4,996 87.4 Dubuque          94,656  10,359 10.9    84,297 89.1
Benton           25,566   2,886 11.3    22,680 88.7 Emmet             9,645   1,230 12.8     8,415 87.2
Black Hawk      131,212  15,342 11.7   115,870 88.3 Fayette          20,234   2,868 14.2    17,366 85.8
Boone            25,769   3,643 14.1    22,126 85.9 Floyd            15,841   2,180 13.8    13,661 86.2
Bremer           24,176   2,307  9.5    21,869 90.5 Franklin         10,336   1,331 12.9     9,005 87.1
Buchanan         20,745   2,117 10.2    18,628 89.8 Fremont           6,983   1,042 14.9     5,941 85.1
Buena Vista      20,234   1,892  9.4    18,342 90.6 Greene            9,059   1,469 16.2     7,590 83.8
Butler           14,705   1,479 10.1    13,226 89.9 Grundy           12,255   1,289 10.5    10,966 89.5
Calhoun           9,381   1,301 13.9     8,080 86.1 Guthrie          10,602   1,382 13.0     9,220 87.0
Carroll          20,266   2,257 11.1    18,009 88.9 Hamilton         15,093   2,009 13.3    13,084 86.7
Cass             13,329   2,040 15.3    11,289 84.7 Hancock          10,940   1,230 11.2     9,710 88.8
Cedar            18,133   2,128 11.7    16,005 88.3 Hardin           16,849   2,095 12.4    14,754 87.6
Cerro Gordo      42,822   5,818 13.6    37,004 86.4 Harrison         14,218   2,101 14.8    12,117 85.2
Cherokee         11,460   1,572 13.7     9,888 86.3 Henry            18,884   2,389 12.7    16,495 87.3
Chickasaw        12,116   1,658 13.7    10,458 86.3 Howard            9,320   1,138 12.2     8,182 87.8
Clarke            9,142   1,123 12.3     8,019 87.7 Humboldt          9,557   1,138 11.9     8,419 88.1
Clay             16,255   2,201 13.5    14,054 86.5 Ida               6,942     896 12.9     6,046 87.1
Clayton          17,569   2,138 12.2    15,431 87.8 Iowa             16,095   1,770 11.0    14,325 89.0
Clinton          47,870   6,157 12.9    41,713 87.1 Jackson          19,381   2,446 12.6    16,935 87.4
Crawford         17,051   2,293 13.4    14,758 86.6 Jasper           35,023   5,189 14.8    29,834 85.2
Dallas           74,382   5,656  7.6    68,726 92.4 Jefferson        17,173   1,763 10.3    15,410 89.7
County Total Disability No Disability   County Total Disability No Disability
Count % Count % Count % Count %
Johnson         137,748  10,109  7.3   127,639 92.7 Pottawattamie    92,061  13,445 14.6    78,616 85.4
Jones            19,236   2,419 12.6    16,817 87.4 Poweshiek        18,388   2,249 12.2    16,139 87.8
Keokuk           10,168   1,578 15.5     8,590 84.5 Ringgold          4,874     744 15.3     4,130 84.7
Kossuth          15,022   1,943 12.9    13,079 87.1 Sac               9,907   1,238 12.5     8,669 87.5
Lee              34,700   5,714 16.5    28,986 83.5 Scott           168,281  17,342 10.3   150,939 89.7
Linn            214,649  21,868 10.2   192,781 89.8 Shelby           11,770   1,798 15.3     9,972 84.7
Louisa           11,141   1,277 11.5     9,864 88.5 Sioux            34,084   2,502  7.3    31,582 92.7
Lucas             8,598   1,297 15.1     7,301 84.9 Story            92,861   6,510  7.0    86,351 93.0
Lyon             11,553   1,233 10.7    10,320 89.3 Tama             17,098   2,146 12.6    14,952 87.4
Madison          15,457   1,858 12.0    13,599 88.0 Taylor            6,111     877 14.4     5,234 85.6
Mahaska          22,162   2,903 13.1    19,259 86.9 Union            12,435   1,894 15.2    10,541 84.8
Marion           32,999   4,084 12.4    28,915 87.6 Van Buren         7,365   1,021 13.9     6,344 86.1
Marshall         39,971   5,166 12.9    34,805 87.1 Wapello          34,926   5,063 14.5    29,863 85.5
Mills            14,622   2,487 17.0    12,135 83.0 Warren           46,957   5,311 11.3    41,646 88.7
Mitchell         10,545   1,091 10.3     9,454 89.7 Washington       21,694   3,020 13.9    18,674 86.1
Monona            8,876   1,366 15.4     7,510 84.6 Wayne             6,282   1,031 16.4     5,251 83.6
Monroe            7,866   1,000 12.7     6,866 87.3 Webster          35,536   5,220 14.7    30,316 85.3
Montgomery       10,272   1,837 17.9     8,435 82.1 Winnebago        10,395   1,436 13.8     8,959 86.2
Muscatine        42,430   4,694 11.1    37,736 88.9 Winneshiek       20,604   1,687  8.2    18,917 91.8
O'Brien          13,886   1,747 12.6    12,139 87.4 Woodbury        101,578  12,602 12.4    88,976 87.6
Osceola           6,107     851 13.9     5,256 86.1 Worth             7,462   1,013 13.6     6,449 86.4
Page             14,734   2,491 16.9    12,243 83.1 Wright           12,757   1,655 13.0    11,102 87.0
Palo Alto         9,005   1,379 15.3     7,626 84.7                                                    
Plymouth         24,561   2,531 10.3    22,030 89.7                                                    
Pocahontas        6,967     870 12.5     6,097 87.5                                                    
Polk            447,444  46,791 10.5   400,653 89.5                                                    

Count of People with Disabilities for Iowa, by County: 2015

Percentage of People with Disabilities for Iowa, by County: 2015

Discussion

There are a number of concepts and factors which complicate the interpretation of the estimates presented in this report. These concerns affect all statistics from population-based surveys. The estimates included in this document should be interpreted the following limitations in mind and generalized with caution. In each point, a link to the U.S. Census Bureau website describing the limitation or concept in greater detail in the ACS has been provided (www.census.gov/programs-surveys/acs/).

  • Statistics are based on a sample and subject to sample variation (a discussion of this topic can be found here).

  • Statistics based on a sample may not fully represent the total U.S. population (a discussion of this topic can be found here).

  • People responding to the ACS may be different than people not responding (a discussion of this topic can be found here).

  • When people do not respond to all ACS questions their responses are created based on assignment or allocation (a discussion of this topic can be found here).

Additional resources for the ACS:

  • Information on the disability questions can be found here.

  • The ACS design and methodology can be found here.

  • The ACS questionnaire and instructions can be found here.

Definitions

Average—The sum of all of the values in a sample divided by the number of values in the sample.
Median—The middlemost value of a sample that separates the upper half of the values from the lower half of the values.
Prevalence—The proportion of the population with a particular status or condition. Prevalence is usually expressed as a percentage or a number of people per unit of the population.
Population—The total number of inhabitants in a defined geographic area including all races, classes, and groups.
Range—The difference between the largest and smallest values in a sample. In a sample, when the smallest value is subtracted from the largest value the resulting value is called the range.

Rehabilitation Research and Training Center on Disability Statistics and Demographics

Policymakers, program administrators, service providers, researchers, advocates for people with disabilities, and people with disabilities and their families need accessible, valid data/statistics to support their decisions related to policy improvements, program administration, service delivery, protection of civil rights, and major life activities. The StatsRRTC supports decision making through a variety of integrated research and outreach activities by (a) improving knowledge about and access to existing data, (b) generating the knowledge needed to improve future disability data collection, and (c) strengthening connections between the data from and regarding respondents, researchers, and decision makers. In this way, the Stats RRTC supports the improvement of service systems that advance the quality of life for people with disabilities.

Led by the University of New Hampshire, the StatsRRTC is a collaborative effort involving the following partners: American Association of People with Disabilities, Center for Essential Management Services, Council of State Administrators of Vocational Rehabilitation, Kessler Foundation, Mathematica Policy Research, and Public Health Institute. The StatsRRTC is funded by the U.S. Department of Health and Human Services, Administration for Community Living, National Institute on Disability, Independent Living and Rehabilitation Research under grant number 90RT502201, from 2013–2018.

Employment Policy and Measurement Rehabilitation Research and Training Center

The EPM-RRTC generates and translates new information about disability employment policy and ways to measure the labor market experiences of people with disabilities. By improving the quality of available information about program interactions, policy options, and employment outcomes, the EPM-RRTC increases evidence-based advocacy and policymaking.

Led by the University of New Hampshire, the EPM-RRTC is a collaborative effort involving the following partners: Association of University Centers on Disability, Hunter College, Kessler Foundation, Mathematica Policy Research, and the University of Chicago. The EPM-RRTC is funded by the U.S. Department of Health and Human Services, Administration for Community Living, National Institute on Disability, Independent Living and Rehabilitation Research under grant number 90RT503701, from 2015–2020.