AHRQ's Mission

The purpose of the Agency for Healthcare Research and Quality is to enhance the quality, appropriateness, and effectiveness of health services, and access to such services through the establishment of a broad base of scientific research and through the promotion of improvements in clinical and health system practices, including the prevention of diseases and other health conditions.

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  1. hcup-us.ahrq.gov/reports/statbriefs/sb192-Pediatric-Preventable-Hospitalizations-Asthma-Diabetes.jsp
    June 01, 2015 - children living in micropolitan areas (169.0 vs. 96.2 per 100,000 population). … diabetes were more than twice as high as the rates in the highest income areas. … in large metropolitan, micropolitan, and noncore areas. … areas. … residents Micropolitan: Micropolitan areas adjacent and nonadjacent to metropolitan areas Noncore
  2. hcup-us.ahrq.gov/db/state/siddbdocumentation.jsp
    April 01, 2025 - research that requires complete enumeration of hospitals and discharges within geographic areas
  3. hcup-us.ahrq.gov/reports/factsandfigures/2009/exhibit5_1.jsp
    January 01, 2009 - Female rates of hospitalization were also higher than male rates across all areas of patient residence … : The largest difference between females and males was in large fringe metro areas (suburbs), where … the rate of male stays in large central metro, medium and small metro, and micropolitan and noncore areas … Non-maternal females also experienced higher rates of stays than maternal females across all areas of … In medium and small metro areas, non-maternal females had a 67-percent higher rate of stays than maternal
  4. hcup-us.ahrq.gov/db/nation/neds/stats/NEDS_2022_Hospital_MaskedStats.PDF
    January 01, 2022 - 2024 8 Frequency Distribution for HOSP_URCAT4 HOSP_URCAT4 Frequency Percent 1: Large metropolitan areas … with at least 1 million residents 333 33.53 2: Small metropolitan areas with less than 1 million residents … 274 27.59 3: Micropolitan areas 143 14.40 4: Not metropolitan or micropolitan 221 22.26 7: Small … Metro or Micro areas (2 or 3) <= 10 *.** 8: Metropolitan areas (1 or 2) <= 10 *.** 9: Non metropolitan … areas (3 or 4) 14 1.41 please refer to the section on Description of Data Elements.
  5. hcup-us.ahrq.gov/db/nation/neds/stats/NEDS_2021_Hospital_MaskedStats.PDF
    January 01, 2021 - 2024 8 Frequency Distribution for HOSP_URCAT4 HOSP_URCAT4 Frequency Percent 1: Large metropolitan areas … with at least 1 million residents 329 33.13 2: Small metropolitan areas with less than 1 million residents … 274 27.59 3: Micropolitan areas 143 14.40 4: Not metropolitan or micropolitan 220 22.16 7: Small … Metro or Micro areas (2 or 3) <= 10 *.** 8: Metropolitan areas (1 or 2) <= 10 *.** 9: Non metropolitan … areas (3 or 4) 18 1.81 please refer to the section on Description of Data Elements.
  6. hcup-us.ahrq.gov/reports/statbriefs/sb98.pdf
    October 01, 2010 - patients residing in suburban (large fringe metropolitan) locations than for those residing in other areas … and 2007, inpatient mortality for AMI stays decreased more quickly among those living in suburban areas … ) areas, 34 percent decrease in the most rural areas). … for pneumonia compared to patients living in all other areas. … for congestive heart failure and stroke decreased more quickly among patients residing in suburban areas
  7. hcup-us.ahrq.gov/reports/statbriefs/sb166.pdf
    August 01, 2013 - About 30 percent of patients in 2011 were from low-income areas. … Patients residing in large central metropolitan areas accounted for nearly one-third of hospital stays … Patients from rural areas accounted for the smallest share of stays (18 percent). … The hospitalization rate for patients from rural areas was 28 percent higher than for patients living … in medium and small metropolitan areas (1,377 stays versus 1,074 stays per 10,000 population).
  8. hcup-us.ahrq.gov/reports/statbriefs/sb292-COVID-19-Age18to64Hosptl.pdf
    December 01, 2020 - With the COVID-19 pandemic beginning in early 2020, hospital utilization changed considerably, as areas … ■ About 3 in 10 in-hospital deaths for patients aged 18–64 years from large metropolitan (metro) areas … (5.0 to 4.3 million hospitalizations), medium/small metro areas (2.4 to 2.1 million hospitalizations … ), and rural areas (1.2 to 1.1 million hospitalizations), respectively. … (53,100 to 75,500 deaths), medium/small metro areas (27,900 to 35,600 deaths), and rural areas (15,700
  9. hcup-us.ahrq.gov/db/tools/HCUP_Formats.TXT
    December 28, 2023 - >= 1 million" 2 = "2: Metro - Counties in metro areas, population of 250,000 … with at least 1 million residents" 2 = "2: Small metropolitan areas with less … than 1 million residents" 3 = "3: Micropolitan areas" … with at least 1 million residents" 2 = "2: Small metropolitan areas with less … than 1 million residents" 3 = "3: Micropolitan areas"
  10. hcup-us.ahrq.gov/db/state/sasddbdocumentation.jsp
    April 01, 2025 - research that requires complete enumeration of hospital-based ambulatory surgeries within geographic areas
  11. hcup-us.ahrq.gov/reports/statbriefs/sb101.pdf
    November 09, 2010 - There were 4 times as many dog bite- related ED visits and 3 times as many hospital stays in rural areas … than in urban areas … For patients who lived in rural areas, the rate of dog bite-related ED visits was 119.3 per 100,000 … population, about 4 times higher than in urban areas (large central, large fringe, and medium and small … As shown in table 2, the rate of hospitalization for patients in rural areas was 2.9 stays per 100,000
  12. hcup-us.ahrq.gov/reports/statbriefs/sb208-Teen-Childbirth-Hospital-Stays-Trends.jsp
    August 01, 2016 - The rate of teen hospital stays for childbirth was highest in low-income areas, in small metropolitan … , compared with large metropolitan areas (21.6). … 1) and only 8.1 percent lived in the highest income areas (quartile 4). … (40.7 vs. 8.1 per 1,000 females aged 15-19 years); in rural compared with large metropolitan areas ( … (40.7 vs. 8.1 per 1,000 females aged 15–19 years); in rural compared with large metropolitan areas
  13. hcup-us.ahrq.gov/reports/statbriefs/sb216-Mental-Substance-Use-Disorder-ED-Visit-Trends.pdf
    October 12, 2016 - (73.6 percent), followed by noncore areas (65.8 percent), large metropolitan areas (55.9 percent), … and then small metropolitan areas (46.0 percent). … , and lowest in small metropolitan areas (39.4 percent). … UICs emphasize the relationship of outlying counties to major metropolitan areas. … Micropolitan areas with cities of at least 10,000 residents • Areas that are neither metropolitan nor
  14. hcup-us.ahrq.gov/reports/statbriefs/sb216-Mental-Substance-Use-Disorder-ED-Visit-Trends.jsp
    December 01, 2016 - (73.6 percent), followed by noncore areas (65.8 percent), large metropolitan areas (55.9 percent), and … then small metropolitan areas (46.0 percent). … , and lowest in small metropolitan areas (39.4 percent). … UICs emphasize the relationship of outlying counties to major metropolitan areas. … areas with cities of at least 10,000 residents Areas that are neither metropolitan nor micropolitan
  15. hcup-us.ahrq.gov/db/ccr/ed-ccr/CCR-CD-SEDD-UserGuide2017v2.pdf
    November 13, 2020 - emergency department cost-to-charge ratio GAF Capital cost adjustment index for core-based statistical areas … Adjustment Factor (Data Element GAF) The capital cost adjustment index for core-based statistical areas … All rural areas in each State are combined to compute a single wage index. 5.
  16. hcup-us.ahrq.gov/reports/statbriefs/sb128.pdf
    August 01, 2011 - any type of cardiac stent were spread fairly evenly across income categories and urban/rural metro areas … , although patients living in the highest income areas had fewer stays than the second lowest income … category and patients from rural areas had fewer stays than medium and small metro areas. … with 1 million or more residents – Medium Metropolitan: Counties in metropolitan areas of 250,000 … –999,999 residents – Small Metropolitan: Counties in metropolitan areas of 50,000–249,999 residents
  17. hcup-us.ahrq.gov/reports/statbriefs/sb119.pdf
    August 01, 2011 - ■ ED visits for air and paintball gun injuries were higher in rural areas (92 per 1 million population … ) than in urban areas (61 per 1 million population) … 35 33 2 40 years and older 13 12 1 Patient residence, rate per 1,000,000 population1 Urban areas … (large central, large fringe, and small and medium metropolitan) 61 59 2 Rural areas (micropolitan … rate of ED visits for injuries caused by air and paintball guns was higher in rural than in urban areas
  18. hcup-us.ahrq.gov/reports/statbriefs/sb282-COVID-19-AllHospital.pdf
    December 01, 2020 - With the COVID-19 pandemic beginning in early 2020, hospital utilization changed considerably, as areas … ■ One-third of in-hospital deaths (33 percent) for patients from large metropolitan (metro) areas … were COVID-19 related compared with one in five for patients from other areas in April–September … ■ The number of all-cause in-hospital deaths for patients from large metro areas increased by 39.5 … (21.8 percent) and rural areas (20.4 percent).
  19. hcup-us.ahrq.gov/seddoverview.jsp
    January 01, 2025 - 265 KB; HTML ) Contents: About the SEDD SEDD Data Elements SEDD File Structure SEDD Areas … Return to Contents   SEDD Areas of Research and HCUP Publications The SEDD combined with … are well suited for research that requires complete enumeration of hospital-owned EDs within market areas
  20. hcup-us.ahrq.gov/reports/statbriefs/sb55.pdf
    July 01, 2008 - temperature e uninsured: 16 heat-related a of cold-relate While there w stays per 100 in large metro rural areas … ) compared to metropolitan and micropolitan areas (figure 3). … While there were less than 2 stays per 100,000 population in large metropolitan areas, in rural areas … More patients may be hospitalized in rural areas because of relatively poorer access to outpatient health … compared to metropolitan areas, 2005* *Based on all-listed ICD-9-CM external cause of injury codes

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