Multicenter validation of American Association for the Surgery of Trauma grading system for acute colonic diverticulitis and its use for emergency general surgery quality improvement program

American Association for the Surgery of Trauma Patient Assessment Committee

Research output: Contribution to journalArticle

Abstract

BACKGROUND: The American Association for the Surgery of Trauma (AAST) has developed a new grading system for uniform description of anatomic severity of emergency general surgery (EGS) diseases, ranging from Grade I (mild) to Grade V (severe). The purpose of this study was to determine the relationship of AAST grades for acute colonic diverticulitis with patient outcomes. A secondary purpose was to propose an EGS quality improvement program using risk-adjusted center outcomes, similar to National Surgical Quality Improvement Program and Trauma Quality Improvement Program methodologies. METHODS: This was a retrospective study of 1,105 patients (one death) from 13 centers. At each center, two reviewers (blinded to each other's assignments) assigned AAST grades. Interrater reliability was measured using ê coefficient. Relationship between AAST grade and clinical events (complications, intensive care unit use, surgical intervention, and 30-day readmission) aswell as length of stay wasmeasured using regression analyses to control for age, comorbidities, and physiologic status at the time of admission. Final modelwas also used to calculate observed-to-expected (O-E) ratios for adverse outcomes (death, complications, readmissions) for each center. RESULTS: Median age was 54 years, 52%were males, 43%were minorities, and 22%required a surgical intervention. Almost two thirds had Grade I or II disease. There was a high level of agreement for grades between reviewers (ê = 0.81). Adverse events increased from 13% for Grade I, to 18% for Grade II, 28% for Grade III, 44% for Grade IV, and 50% for Grade V. Regression analysis showed that higher disease grades were independently associated with all clinical events and length of stay, after adjusting for age, comorbidities, and physiology. O-E ratios showed statistically insignificant variations in risk of death, complications, or readmissions. CONCLUSION: AAST grades for acute colonic diverticulitis are independently associated with clinical outcomes and resource use. EGS quality improvement program methodology that incorporates AAST grade, age, comorbidities, and physiologic status may be used for measuring quality of EGS care. High-quality EGS registries are essential for developing meaningful quality metrics.

Original languageEnglish (US)
Pages (from-to)405-411
Number of pages7
JournalJournal of Trauma and Acute Care Surgery
Volume80
Issue number3
DOIs
StatePublished - Jan 1 2016
Externally publishedYes

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Colonic Diverticulitis
Quality Improvement
Emergencies
Wounds and Injuries
Comorbidity
Length of Stay
Regression Analysis
Intensive Care Units

Keywords

  • Emergency general surgery
  • EQIP
  • Grading
  • Quality of care
  • Scoring

ASJC Scopus subject areas

  • Surgery
  • Critical Care and Intensive Care Medicine

Cite this

Multicenter validation of American Association for the Surgery of Trauma grading system for acute colonic diverticulitis and its use for emergency general surgery quality improvement program. / American Association for the Surgery of Trauma Patient Assessment Committee.

In: Journal of Trauma and Acute Care Surgery, Vol. 80, No. 3, 01.01.2016, p. 405-411.

Research output: Contribution to journalArticle

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abstract = "BACKGROUND: The American Association for the Surgery of Trauma (AAST) has developed a new grading system for uniform description of anatomic severity of emergency general surgery (EGS) diseases, ranging from Grade I (mild) to Grade V (severe). The purpose of this study was to determine the relationship of AAST grades for acute colonic diverticulitis with patient outcomes. A secondary purpose was to propose an EGS quality improvement program using risk-adjusted center outcomes, similar to National Surgical Quality Improvement Program and Trauma Quality Improvement Program methodologies. METHODS: This was a retrospective study of 1,105 patients (one death) from 13 centers. At each center, two reviewers (blinded to each other's assignments) assigned AAST grades. Interrater reliability was measured using {\^e} coefficient. Relationship between AAST grade and clinical events (complications, intensive care unit use, surgical intervention, and 30-day readmission) aswell as length of stay wasmeasured using regression analyses to control for age, comorbidities, and physiologic status at the time of admission. Final modelwas also used to calculate observed-to-expected (O-E) ratios for adverse outcomes (death, complications, readmissions) for each center. RESULTS: Median age was 54 years, 52{\%}were males, 43{\%}were minorities, and 22{\%}required a surgical intervention. Almost two thirds had Grade I or II disease. There was a high level of agreement for grades between reviewers ({\^e} = 0.81). Adverse events increased from 13{\%} for Grade I, to 18{\%} for Grade II, 28{\%} for Grade III, 44{\%} for Grade IV, and 50{\%} for Grade V. Regression analysis showed that higher disease grades were independently associated with all clinical events and length of stay, after adjusting for age, comorbidities, and physiology. O-E ratios showed statistically insignificant variations in risk of death, complications, or readmissions. CONCLUSION: AAST grades for acute colonic diverticulitis are independently associated with clinical outcomes and resource use. EGS quality improvement program methodology that incorporates AAST grade, age, comorbidities, and physiologic status may be used for measuring quality of EGS care. High-quality EGS registries are essential for developing meaningful quality metrics.",
keywords = "Emergency general surgery, EQIP, Grading, Quality of care, Scoring",
author = "{American Association for the Surgery of Trauma Patient Assessment Committee} and Shahid Shafi and Priest, {Elisa L.} and Crandall, {Marie L.} and Klekar, {Christopher S.} and Ali Nazim and Michel Aboutanos and Suresh Agarwal and Bishwajit Bhattacharya and Nickolas Byrge and Dhillon, {Tejveer S.} and Eboli, {Dominick J.} and Drew Fielder and Oscar Guillamondegui and Oliver Gunter and Kenji Inaba and Mowery, {Nathan T.} and Raminder Nirula and Ross, {Steven E.} and Savage, {Stephanie A.} and Schuster, {Kevin M.} and Schmoker, {Ryan K.} and Stefano Siboni and Nicole Siparsky and Trust, {Marc D.} and Utter, {Garth H.} and James Whelan and Feliciano, {David V.} and Grace Rozycki",
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T1 - Multicenter validation of American Association for the Surgery of Trauma grading system for acute colonic diverticulitis and its use for emergency general surgery quality improvement program

AU - American Association for the Surgery of Trauma Patient Assessment Committee

AU - Shafi, Shahid

AU - Priest, Elisa L.

AU - Crandall, Marie L.

AU - Klekar, Christopher S.

AU - Nazim, Ali

AU - Aboutanos, Michel

AU - Agarwal, Suresh

AU - Bhattacharya, Bishwajit

AU - Byrge, Nickolas

AU - Dhillon, Tejveer S.

AU - Eboli, Dominick J.

AU - Fielder, Drew

AU - Guillamondegui, Oscar

AU - Gunter, Oliver

AU - Inaba, Kenji

AU - Mowery, Nathan T.

AU - Nirula, Raminder

AU - Ross, Steven E.

AU - Savage, Stephanie A.

AU - Schuster, Kevin M.

AU - Schmoker, Ryan K.

AU - Siboni, Stefano

AU - Siparsky, Nicole

AU - Trust, Marc D.

AU - Utter, Garth H.

AU - Whelan, James

AU - Feliciano, David V.

AU - Rozycki, Grace

PY - 2016/1/1

Y1 - 2016/1/1

N2 - BACKGROUND: The American Association for the Surgery of Trauma (AAST) has developed a new grading system for uniform description of anatomic severity of emergency general surgery (EGS) diseases, ranging from Grade I (mild) to Grade V (severe). The purpose of this study was to determine the relationship of AAST grades for acute colonic diverticulitis with patient outcomes. A secondary purpose was to propose an EGS quality improvement program using risk-adjusted center outcomes, similar to National Surgical Quality Improvement Program and Trauma Quality Improvement Program methodologies. METHODS: This was a retrospective study of 1,105 patients (one death) from 13 centers. At each center, two reviewers (blinded to each other's assignments) assigned AAST grades. Interrater reliability was measured using ê coefficient. Relationship between AAST grade and clinical events (complications, intensive care unit use, surgical intervention, and 30-day readmission) aswell as length of stay wasmeasured using regression analyses to control for age, comorbidities, and physiologic status at the time of admission. Final modelwas also used to calculate observed-to-expected (O-E) ratios for adverse outcomes (death, complications, readmissions) for each center. RESULTS: Median age was 54 years, 52%were males, 43%were minorities, and 22%required a surgical intervention. Almost two thirds had Grade I or II disease. There was a high level of agreement for grades between reviewers (ê = 0.81). Adverse events increased from 13% for Grade I, to 18% for Grade II, 28% for Grade III, 44% for Grade IV, and 50% for Grade V. Regression analysis showed that higher disease grades were independently associated with all clinical events and length of stay, after adjusting for age, comorbidities, and physiology. O-E ratios showed statistically insignificant variations in risk of death, complications, or readmissions. CONCLUSION: AAST grades for acute colonic diverticulitis are independently associated with clinical outcomes and resource use. EGS quality improvement program methodology that incorporates AAST grade, age, comorbidities, and physiologic status may be used for measuring quality of EGS care. High-quality EGS registries are essential for developing meaningful quality metrics.

AB - BACKGROUND: The American Association for the Surgery of Trauma (AAST) has developed a new grading system for uniform description of anatomic severity of emergency general surgery (EGS) diseases, ranging from Grade I (mild) to Grade V (severe). The purpose of this study was to determine the relationship of AAST grades for acute colonic diverticulitis with patient outcomes. A secondary purpose was to propose an EGS quality improvement program using risk-adjusted center outcomes, similar to National Surgical Quality Improvement Program and Trauma Quality Improvement Program methodologies. METHODS: This was a retrospective study of 1,105 patients (one death) from 13 centers. At each center, two reviewers (blinded to each other's assignments) assigned AAST grades. Interrater reliability was measured using ê coefficient. Relationship between AAST grade and clinical events (complications, intensive care unit use, surgical intervention, and 30-day readmission) aswell as length of stay wasmeasured using regression analyses to control for age, comorbidities, and physiologic status at the time of admission. Final modelwas also used to calculate observed-to-expected (O-E) ratios for adverse outcomes (death, complications, readmissions) for each center. RESULTS: Median age was 54 years, 52%were males, 43%were minorities, and 22%required a surgical intervention. Almost two thirds had Grade I or II disease. There was a high level of agreement for grades between reviewers (ê = 0.81). Adverse events increased from 13% for Grade I, to 18% for Grade II, 28% for Grade III, 44% for Grade IV, and 50% for Grade V. Regression analysis showed that higher disease grades were independently associated with all clinical events and length of stay, after adjusting for age, comorbidities, and physiology. O-E ratios showed statistically insignificant variations in risk of death, complications, or readmissions. CONCLUSION: AAST grades for acute colonic diverticulitis are independently associated with clinical outcomes and resource use. EGS quality improvement program methodology that incorporates AAST grade, age, comorbidities, and physiologic status may be used for measuring quality of EGS care. High-quality EGS registries are essential for developing meaningful quality metrics.

KW - Emergency general surgery

KW - EQIP

KW - Grading

KW - Quality of care

KW - Scoring

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