Table 2. Description of the sample of women with and without intellectual and developmental disability.
| Characteristic | Women without IDD | Women with IDD | F test | ||
|---|---|---|---|---|---|
|
| |||||
| n=4,194,938 | n=1,897 | ||||
|
| |||||
| n | % | n | % | ||
| Race and ethnic identity | 212.6*** | ||||
| Non-Hispanic White | 1,795,889 | 42.8% | 896 | 47.2% | |
| Non-Hispanic Black | 485,234 | 11.6% | 371 | 19.6% | |
| Hispanic | 812,815 | 19.4% | 210 | 11.1% | |
| Non-Hispanic Other | 380,195 | 9.1% | 98 | 5.2% | |
| Unknown Race/Ethnicity | 720,805 | 17.2% | 322 | 17.0% | |
| Age in years at admission | 138.8*** | ||||
| <25 | 1,415,245 | 33.8% | 882 | 46.5% | |
| 25-34 | 2,168,133 | 51.7% | 810 | 42.7% | |
| >34 | 608,121 | 14.5% | 205 | 10.8% | |
| Insurance payer type | 7338.5*** | ||||
| Medicare | 27,980 | 0.7% | 311 | 16.4% | |
| Medicaid | 1,801,506 | 43.0% | 1,081 | 57.0% | |
| Private insurance | 2,097,112 | 50.1% | 438 | 23.1% | |
| Uninsured | 261,319 | 6.2% | 65 | 3.4% | |
| Comorbidity† | 2593.4*** | ||||
| No comorbidity | 3,226,627 | 76.9% | 524 | 27.6% | |
| One or more comorbidities | 968,311 | 23.1% | 1,373 | 72.4% | |
| Median household income for patient's ZIP code | 58.0*** | ||||
| 1st quartile:$1-$38,999 | 1,111,933 | 27.0% | 752 | 40.6% | |
| 2nd quartile:$39,000-$47,999 | 1,044,490 | 25.4% | 512 | 27.6% | |
| 3rd quartile:$48,000-$62,999 | 1,015,860 | 24.7% | 366 | 19.7% | |
| 4th quartile:$63,000 + | 941,864 | 22.9% | 224 | 12.1% | |
| Region of hospital | 75.8*** | ||||
| Northeast | 655,016 | 15.6% | 364 | 19.2% | |
| Midwest | 885,687 | 21.1% | 471 | 24.8% | |
| South | 1,602,552 | 38.2% | 737 | 38.9% | |
| West | 1,051,683 | 25.1% | 325 | 17.1% | |
| Location of hospital | 14.7*** | ||||
| Rural | 469,588 | 11.3% | 264 | 14.1% | |
| Urban | 3,681,235 | 88.7% | 1,606 | 85.9% | |
| Hospital teaching status | |||||
| Non-teaching hospital | 2,187,554 | 52.7% | 821 | 43.9% | |
| Teaching hospital | 1,963,269 | 47.3% | 1,049 | 56.1% | |
| Calendar year | 12.6* | ||||
| 2007 | 929,895 | 22.2% | 363 | 19.1% | |
| 2008 | 868,657 | 20.7% | 382 | 20.1% | |
| 2009 | 821,627 | 19.6% | 395 | 20.8% | |
| 2010 | 778,012 | 18.5% | 369 | 19.5% | |
| 2011 | 796,747 | 19.0% | 388 | 20.5% | |
| Age in years at admission | Mean | SE | Mean | SE | -11.5*** |
| 27.6 | 0.002 | 25.9 | 0.14 | ||
*
p<0.05;
**
p<0.01;
***
p<0.001.
Acronyms: IDD- Intellectual and developmental disability, AHRQ- Agency for Health Care Research and Quality.
†
Comorbidity variable is generated using the AHRQ comorbidity software.15,25 Patients are considered to have comorbidity if their discharge records show that they have one more of the 29 types of patient comorbidities identified by AHRQ using the standard method by Elixhauser.15
Data source: Nationwide Inpatient Sample, Healthcare Cost and Utilization Project, 2007-2011