메뉴 건너뛰기




Volumn 350, Issue , 2015, Pages

Trajectories of risk after hospitalization for heart failure, acute myocardial infarction, or pneumonia: Retrospective cohort study

Author keywords

[No Author keywords available]

Indexed keywords

ABSOLUTE RISK; ACUTE HEART INFARCTION; AGED; ARTICLE; COHORT ANALYSIS; CONTROLLED STUDY; FEMALE; HEART FAILURE; HOSPITAL DISCHARGE; HOSPITAL READMISSION; HOSPITALIZATION; HUMAN; MAJOR CLINICAL STUDY; MALE; MEDICARE; MORTALITY; OUTCOME ASSESSMENT; PNEUMONIA; PRIORITY JOURNAL; RETROSPECTIVE STUDY; RISK; RISK ASSESSMENT; RISK FACTOR; RISK REDUCTION; UNITED STATES; CLINICAL TRIAL; INCIDENCE; MEDICAL FEE; MULTICENTER STUDY; MYOCARDIAL INFARCTION; PROCEDURES; STATISTICS AND NUMERICAL DATA; SURVIVAL RATE; TRENDS; VERY ELDERLY;

EID: 84929456255     PISSN: 09598146     EISSN: 17561833     Source Type: Journal    
DOI: 10.1136/bmj.h411     Document Type: Article
Times cited : (165)

References (49)
  • 1
    • 63849134505 scopus 로고    scopus 로고
    • Rehospitalizations among patients in the Medicare fee-for-service program
    • Jencks SF, Williams MV, Coleman EA. Rehospitalizations among patients in the Medicare fee-for-service program. N Engl J Med 2009;360:1418-28.
    • (2009) N Engl J Med , vol.360 , pp. 1418-1428
    • Jencks, S.F.1    Williams, M.V.2    Coleman, E.A.3
  • 2
    • 77953012147 scopus 로고    scopus 로고
    • Trends in length of stay and short-term outcomes among Medicare patients hospitalized for heart failure, 1993-2006
    • Bueno H, Ross JS, Wang Y, Chen J, Vidan MT, Normand SL, et al. Trends in length of stay and short-term outcomes among Medicare patients hospitalized for heart failure, 1993-2006. JAMA 2010;303:2141-7.
    • (2010) JAMA , vol.303 , pp. 2141-2147
    • Bueno, H.1    Ross, J.S.2    Wang, Y.3    Chen, J.4    Vidan, M.T.5    Normand, S.L.6
  • 3
    • 84855280813 scopus 로고    scopus 로고
    • Comparison of hospital risk-standardized mortality rates calculated by using in-hospital and 30-day models: An observational study with implications for hospital profiling
    • Drye EE, Normand SL, Wang Y, Ross JS, Schreiner GC, Han L, et al. Comparison of hospital risk-standardized mortality rates calculated by using in-hospital and 30-day models: an observational study with implications for hospital profiling. Ann Intern Med 2012;156:19-26.
    • (2012) Ann Intern Med , vol.156 , pp. 19-26
    • Drye, E.E.1    Normand, S.L.2    Wang, Y.3    Ross, J.S.4    Schreiner, G.C.5    Han, L.6
  • 4
    • 84872764931 scopus 로고    scopus 로고
    • Diagnoses and timing of 30-day readmissions after hospitalization for heart failure, acute myocardial infarction, or pneumonia
    • Dharmarajan K, Hsieh AF, Lin Z, Bueno H, Ross JS, Horwitz LI, et al. Diagnoses and timing of 30-day readmissions after hospitalization for heart failure, acute myocardial infarction, or pneumonia. JAMA 2013;309:355-63.
    • (2013) JAMA , vol.309 , pp. 355-363
    • Dharmarajan, K.1    Hsieh, A.F.2    Lin, Z.3    Bueno, H.4    Ross, J.S.5    Horwitz, L.I.6
  • 5
    • 84872069531 scopus 로고    scopus 로고
    • Post-hospital syndrome-an acquired, transient condition of generalized risk
    • Krumholz HM. Post-hospital syndrome-an acquired, transient condition of generalized risk. N Engl J Med 2013;368:100-2.
    • (2013) N Engl J Med , vol.368 , pp. 100-102
    • Krumholz, H.M.1
  • 6
    • 0031031212 scopus 로고    scopus 로고
    • Readmission after hospitalization for congestive heart failure among Medicare beneficiaries
    • Krumholz HM, Parent EM, Tu N, Vaccarino V, Wang Y, Radford MJ, et al. Readmission after hospitalization for congestive heart failure among Medicare beneficiaries. Arch Intern Med 1997;157:99-104.
    • (1997) Arch Intern Med , vol.157 , pp. 99-104
    • Krumholz, H.M.1    Parent, E.M.2    Tu, N.3    Vaccarino, V.4    Wang, Y.5    Radford, M.J.6
  • 7
    • 76549113397 scopus 로고    scopus 로고
    • Recent national trends in readmission rates after heart failure hospitalization
    • Ross JS, Chen J, Lin Z, Bueno H, Curtis JP, Keenan PS, et al. Recent national trends in readmission rates after heart failure hospitalization. Circ Heart Fail 2010;3:97-103.
    • (2010) Circ Heart Fail , vol.3 , pp. 97-103
    • Ross, J.S.1    Chen, J.2    Lin, Z.3    Bueno, H.4    Curtis, J.P.5    Keenan, P.S.6
  • 8
    • 78349308135 scopus 로고    scopus 로고
    • National patterns of risk-standardized mortality and readmission for acute myocardial infarction and heart failure. Update on publicly reported outcomes measures based on the 2010 release
    • Bernheim SM, Grady JN, Lin Z, Wang Y, Wang Y, Savage SV, et al. National patterns of risk-standardized mortality and readmission for acute myocardial infarction and heart failure. Update on publicly reported outcomes measures based on the 2010 release. Circ Cardiovasc Qual Outcomes 2010;3:459-67.
    • (2010) Circ Cardiovasc Qual Outcomes , vol.3 , pp. 459-467
    • Bernheim, S.M.1    Grady, J.N.2    Lin, Z.3    Wang, Y.4    Wang, Y.5    Savage, S.V.6
  • 9
    • 84864200558 scopus 로고    scopus 로고
    • Lifetime analysis of hospitalizations and survival of patients newly admitted with heart failure
    • Chun S, Tu JV, Wijeysundera HC, Austin PC, Wang X, Levy D, et al. Lifetime analysis of hospitalizations and survival of patients newly admitted with heart failure. Circ Heart Fail 2012;5:414-21.
    • (2012) Circ Heart Fail , vol.5 , pp. 414-421
    • Chun, S.1    Tu, J.V.2    Wijeysundera, H.C.3    Austin, P.C.4    Wang, X.5    Levy, D.6
  • 10
    • 84863626168 scopus 로고    scopus 로고
    • Trends in long-term cardiovascular mortality and morbidity in men and women with heart failure of ischemic versus non-ischemic aetiology in Western Australia between 1990 and 2005
    • Teng TH, Hung J, Knuiman M, Stewart S, Arnolda L, Jacobs I, et al. Trends in long-term cardiovascular mortality and morbidity in men and women with heart failure of ischemic versus non-ischemic aetiology in Western Australia between 1990 and 2005. Int J Cardiol 2012;158:405-10.
    • (2012) Int J Cardiol , vol.158 , pp. 405-410
    • Teng, T.H.1    Hung, J.2    Knuiman, M.3    Stewart, S.4    Arnolda, L.5    Jacobs, I.6
  • 11
    • 0344420330 scopus 로고    scopus 로고
    • Predicting mortality among patients hospitalized for heart failure: Derivation and validation of a clinical model
    • Lee DS, Austin PC, Rouleau JL, Liu PP, Naimark D, Tu JV. Predicting mortality among patients hospitalized for heart failure: derivation and validation of a clinical model. JAMA 2003;290:2581-7.
    • (2003) JAMA , vol.290 , pp. 2581-2587
    • Lee, D.S.1    Austin, P.C.2    Rouleau, J.L.3    Liu, P.P.4    Naimark, D.5    Tu, J.V.6
  • 12
    • 84929458922 scopus 로고    scopus 로고
    • Healthcare Cost and Utilization Project (HCUP), statistical brief 66
    • Agency for Healthcare Research and Quality, 2014
    • Agency for Healthcare Research and Quality. Healthcare Cost and Utilization Project (HCUP), statistical brief 66. AHRQ, 2009. 2014. www.hcup-us.ahrq.gov/reports/statbriefs/sb66.jsp
    • (2009) AHRQ
  • 13
    • 80054881110 scopus 로고    scopus 로고
    • Hospital readmissions and the Affordable Care Act: Paying for coordinated quality care
    • Kocher RP, Adashi EY. Hospital readmissions and the Affordable Care Act: paying for coordinated quality care. JAMA 2011;306:1794-5.
    • (2011) JAMA , vol.306 , pp. 1794-1795
    • Kocher, R.P.1    Adashi, E.Y.2
  • 14
    • 33645794744 scopus 로고    scopus 로고
    • An administrative claims model suitable for profiling hospital performance based on 30-day mortality rates among patients with heart failure
    • Krumholz HM, Wang Y, Mattera JA, Han LF, Ingber MJ, Roman S, et al. An administrative claims model suitable for profiling hospital performance based on 30-day mortality rates among patients with heart failure. Circulation 2006;113:1693-701.
    • (2006) Circulation , vol.113 , pp. 1693-1701
    • Krumholz, H.M.1    Wang, Y.2    Mattera, J.A.3    Han, L.F.4    Ingber, M.J.5    Roman, S.6
  • 15
    • 54049122494 scopus 로고    scopus 로고
    • An administrative claims measure suitable for profiling hospital performance on the basis of 30-day all-cause readmission rates among patients with heart failure
    • Keenan PS, Normand SL, Lin Z, Drye EE, Bhat KR, Ross JS, et al. An administrative claims measure suitable for profiling hospital performance on the basis of 30-day all-cause readmission rates among patients with heart failure. Circ Cardiovasc Qual Outcomes 2008;1:29-37.
    • (2008) Circ Cardiovasc Qual Outcomes , vol.1 , pp. 29-37
    • Keenan, P.S.1    Normand, S.L.2    Lin, Z.3    Drye, E.E.4    Bhat, K.R.5    Ross, J.S.6
  • 16
    • 79959697118 scopus 로고    scopus 로고
    • An administrative claims measure suitable for profiling hospital performance based on 30-day all-cause readmission rates among patients with acute myocardial infarction
    • Krumholz HM, Lin Z, Drye EE, Desai MM, Han LF, Rapp MT, et al. An administrative claims measure suitable for profiling hospital performance based on 30-day all-cause readmission rates among patients with acute myocardial infarction. Circ Cardiovasc Qual Outcomes 2011;4:243-52.
    • (2011) Circ Cardiovasc Qual Outcomes , vol.4 , pp. 243-252
    • Krumholz, H.M.1    Lin, Z.2    Drye, E.E.3    Desai, M.M.4    Han, L.F.5    Rapp, M.T.6
  • 17
    • 79954521691 scopus 로고    scopus 로고
    • An administrative claims model for profiling hospital 30-day mortality rates for pneumonia patients
    • Bratzler DW, Normand SL, Wang Y, O'Donnell WJ, Metersky M, Han LF, et al. An administrative claims model for profiling hospital 30-day mortality rates for pneumonia patients. PLoS One 2011;6:e17401.
    • (2011) PLoS One , vol.6 , pp. e17401
    • Bratzler, D.W.1    Normand, S.L.2    Wang, Y.3    O'Donnell, W.J.4    Metersky, M.5    Han, L.F.6
  • 18
    • 79952469323 scopus 로고    scopus 로고
    • Development, validation, and results of a measure of 30-day readmission following hospitalization for pneumonia
    • Lindenauer PK, Normand SL, Drye EE, Lin Z, Goodrich K, Desai MM, et al. Development, validation, and results of a measure of 30-day readmission following hospitalization for pneumonia. J Hosp Med 2011;6:142-50.
    • (2011) J Hosp Med , vol.6 , pp. 142-150
    • Lindenauer, P.K.1    Normand, S.L.2    Drye, E.E.3    Lin, Z.4    Goodrich, K.5    Desai, M.M.6
  • 19
    • 84929461812 scopus 로고    scopus 로고
    • Centers for Medicare & Medicaid Services, Centers for Medicare & Medicaid Services, Mar
    • Centers for Medicare & Medicaid Services. Planned readmission algorithm. Version 2.1. Centers for Medicare & Medicaid Services, Mar 2013.
    • (2013) Planned Readmission Algorithm. Version 2.1
  • 20
    • 1542532754 scopus 로고    scopus 로고
    • A proportional hazards model for the subdistribution of a competing risk
    • Fine JP, Gray RJ. A proportional hazards model for the subdistribution of a competing risk. J Am Statist Assoc 1999;94:496-509.
    • (1999) J Am Statist Assoc , vol.94 , pp. 496-509
    • Fine, J.P.1    Gray, R.J.2
  • 21
    • 0000120995 scopus 로고
    • A class of K-sample tests for comparing the cumulative incidence of a competing risk
    • Gray RJ. A class of K-sample tests for comparing the cumulative incidence of a competing risk. Ann Stat 1988;16:1141-54.
    • (1988) Ann Stat , vol.16 , pp. 1141-1154
    • Gray, R.J.1
  • 22
    • 0002684932 scopus 로고
    • Kernel estimation of regression functions. Smoothing techniques for curve estimation
    • Gasser T, Müller HG. Kernel estimation of regression functions. Smoothing techniques for curve estimation. Lect Notes Math 1979;757:23-68.
    • (1979) Lect Notes Math , vol.757 , pp. 23-68
    • Gasser, T.1    Müller, H.G.2
  • 23
    • 84858630820 scopus 로고    scopus 로고
    • The potential for cost savings through bundled episode payments
    • Cutler DM, Ghosh K. The potential for cost savings through bundled episode payments. N Engl J Med 2012;366:1075-7.
    • (2012) N Engl J Med , vol.366 , pp. 1075-1077
    • Cutler, D.M.1    Ghosh, K.2
  • 24
    • 0035854054 scopus 로고    scopus 로고
    • Validation of clinical classification schemes for predicting stroke: Results from the National Registry of Atrial Fibrillation
    • Gage BF, Waterman AD, Shannon W, Boechler M, Rich MW, Radford MJ. Validation of clinical classification schemes for predicting stroke: results from the National Registry of Atrial Fibrillation. JAMA 2001;285:2864-70.
    • (2001) JAMA , vol.285 , pp. 2864-2870
    • Gage, B.F.1    Waterman, A.D.2    Shannon, W.3    Boechler, M.4    Rich, M.W.5    Radford, M.J.6
  • 25
    • 77951894040 scopus 로고    scopus 로고
    • Relationship between early physician follow-up and 30-day readmission among Medicare beneficiaries hospitalized for heart failure
    • Hernandez AF, Greiner MA, Fonarow GC, Hammill BG, Heidenreich PA, Yancy CW, et al. Relationship between early physician follow-up and 30-day readmission among Medicare beneficiaries hospitalized for heart failure. JAMA 2010;303:1716-22.
    • (2010) JAMA , vol.303 , pp. 1716-1722
    • Hernandez, A.F.1    Greiner, M.A.2    Fonarow, G.C.3    Hammill, B.G.4    Heidenreich, P.A.5    Yancy, C.W.6
  • 26
    • 33749031312 scopus 로고    scopus 로고
    • The care transitions intervention: Results of a randomized controlled trial
    • Coleman EA, Parry C, Chalmers S, Min SJ. The care transitions intervention: results of a randomized controlled trial. Arch Intern Med 2006;166:1822-8.
    • (2006) Arch Intern Med , vol.166 , pp. 1822-1828
    • Coleman, E.A.1    Parry, C.2    Chalmers, S.3    Min, S.J.4
  • 27
    • 0028866659 scopus 로고
    • A multidisciplinary intervention to prevent the readmission of elderly patients with congestive heart failure
    • Rich MW, Beckham V, Wittenberg C, Leven CL, Freedland KE, Carney RM. A multidisciplinary intervention to prevent the readmission of elderly patients with congestive heart failure. N Engl J Med 1995;333:1190-5.
    • (1995) N Engl J Med , vol.333 , pp. 1190-1195
    • Rich, M.W.1    Beckham, V.2    Wittenberg, C.3    Leven, C.L.4    Freedland, K.E.5    Carney, R.M.6
  • 30
    • 0030888239 scopus 로고    scopus 로고
    • Advance directives for seriously ill hospitalized patients: Effectiveness with the patient self-determination act and the SUPPORT intervention. SUPPORT Investigators. Study to Understand Prognoses and Preferences for Outcomes and Risks of Treatment
    • Teno J, Lynn J, Wenger N, Phillips RS, Murphy DP, Connors AF, et al. Advance directives for seriously ill hospitalized patients: effectiveness with the patient self-determination act and the SUPPORT intervention. SUPPORT Investigators. Study to Understand Prognoses and Preferences for Outcomes and Risks of Treatment. J Am Geriatr Soc 1997;45:500-7.
    • (1997) J Am Geriatr Soc , vol.45 , pp. 500-507
    • Teno, J.1    Lynn, J.2    Wenger, N.3    Phillips, R.S.4    Murphy, D.P.5    Connors, A.F.6
  • 31
    • 0141615813 scopus 로고    scopus 로고
    • Noncardiac comorbidity increases preventable hospitalizations and mortality among Medicare beneficiaries with chronic heart failure
    • Braunstein JB, Anderson GF, Gerstenblith G, Weller W, Niefeld M, Herbert R, et al. Noncardiac comorbidity increases preventable hospitalizations and mortality among Medicare beneficiaries with chronic heart failure. J Am Coll Cardiol 2003;42:1226-33.
    • (2003) J Am Coll Cardiol , vol.42 , pp. 1226-1233
    • Braunstein, J.B.1    Anderson, G.F.2    Gerstenblith, G.3    Weller, W.4    Niefeld, M.5    Herbert, R.6
  • 32
    • 84860874557 scopus 로고    scopus 로고
    • Multiple cardiovascular comorbidities and acute myocardial infarction: Temporal trends (1990-2007) and impact on death rates at 30 days and 1 year
    • McManus DD, Nguyen HL, Saczynski JS, Tisminetzky M, Bourell P, Goldberg RJ. Multiple cardiovascular comorbidities and acute myocardial infarction: temporal trends (1990-2007) and impact on death rates at 30 days and 1 year. Clin Epidemiol 2012;4:115-23.
    • (2012) Clin Epidemiol , vol.4 , pp. 115-123
    • McManus, D.D.1    Nguyen, H.L.2    Saczynski, J.S.3    Tisminetzky, M.4    Bourell, P.5    Goldberg, R.J.6
  • 33
    • 34247534568 scopus 로고    scopus 로고
    • Effect of 10 days of bed rest on skeletal muscle in healthy older adults
    • Kortebein P, Ferrando A, Lombeida J, Wolfe R, Evans WJ. Effect of 10 days of bed rest on skeletal muscle in healthy older adults. JAMA 2007;297:1772-4.
    • (2007) JAMA , vol.297 , pp. 1772-1774
    • Kortebein, P.1    Ferrando, A.2    Lombeida, J.3    Wolfe, R.4    Evans, W.J.5
  • 34
    • 7244224813 scopus 로고    scopus 로고
    • Hospitalization, restricted activity, and the development of disability among older persons
    • Gill TM, Allore HG, Holford TR, Guo Z. Hospitalization, restricted activity, and the development of disability among older persons. JAMA 2004;292:2115-24.
    • (2004) JAMA , vol.292 , pp. 2115-2124
    • Gill, T.M.1    Allore, H.G.2    Holford, T.R.3    Guo, Z.4
  • 36
    • 0033016453 scopus 로고    scopus 로고
    • Protein-energy undernutrition among elderly hospitalized patients: A prospective study
    • Sullivan DH, Sun S, Walls RC. Protein-energy undernutrition among elderly hospitalized patients: a prospective study. JAMA 1999;281:2013-9.
    • (1999) JAMA , vol.281 , pp. 2013-2019
    • Sullivan, D.H.1    Sun, S.2    Walls, R.C.3
  • 37
    • 0023257836 scopus 로고
    • Incidence and characteristics of pain in a sample of medical-surgical inpatients
    • Donovan M, Dillon P, McGuire L. Incidence and characteristics of pain in a sample of medical-surgical inpatients. Pain 1987;30:69-78.
    • (1987) Pain , vol.30 , pp. 69-78
    • Donovan, M.1    Dillon, P.2    McGuire, L.3
  • 39
    • 0025924692 scopus 로고
    • Incidence of adverse events and negligence in hospitalized patients. Results of the Harvard Medical Practice Study i
    • Brennan TA, Leape LL, Laird NM, Hebert L, Localio AR, Lawthers AG, et al. Incidence of adverse events and negligence in hospitalized patients. Results of the Harvard Medical Practice Study I. N Engl J Med 1991;324:370-6.
    • (1991) N Engl J Med , vol.324 , pp. 370-376
    • Brennan, T.A.1    Leape, L.L.2    Laird, N.M.3    Hebert, L.4    Localio, A.R.5    Lawthers, A.G.6
  • 40
    • 0031012761 scopus 로고    scopus 로고
    • A prediction rule to identify low-risk patients with communityacquired pneumonia
    • Fine MJ, Auble TE, Yealy DM, Hanusa BH, Weissfeld LA, Singer DE, et al. A prediction rule to identify low-risk patients with communityacquired pneumonia. N Engl J Med 1997;336:243-50.
    • (1997) N Engl J Med , vol.336 , pp. 243-250
    • Fine, M.J.1    Auble, T.E.2    Yealy, D.M.3    Hanusa, B.H.4    Weissfeld, L.A.5    De, S.6
  • 42
    • 78049334037 scopus 로고    scopus 로고
    • An automated model to identify heart failure patients at risk for 30-day readmission or death using electronic medical record data
    • Amarasingham R, Moore BJ, Tabak YP, Drazner MH, Clark CA, Zhang S, et al. An automated model to identify heart failure patients at risk for 30-day readmission or death using electronic medical record data. Med Care 2010;48:981-8.
    • (2010) Med Care , vol.48 , pp. 981-988
    • Amarasingham, R.1    Moore, B.J.2    Tabak, Y.P.3    Drazner, M.H.4    Clark, C.A.5    Zhang, S.6
  • 43
    • 70350098230 scopus 로고    scopus 로고
    • Predictors of short-term rehospitalization following discharge of patients hospitalized with community-acquired pneumonia
    • Capelastegui A, Espana Yandiola PP, Quintana JM, Bilbao A, Diez R, Pascual S, et al. Predictors of short-term rehospitalization following discharge of patients hospitalized with community-acquired pneumonia. Chest 2009;136:1079-85.
    • (2009) Chest , vol.136 , pp. 1079-1085
    • Capelastegui, A.1    Espana Yandiola, P.P.2    Quintana, J.M.3    Bilbao, A.4    Diez, R.5    Pascual, S.6
  • 44
    • 84872503951 scopus 로고    scopus 로고
    • Cognitive impairment in older adults with heart failure: Prevalence, documentation, and impact on outcomes
    • Dodson JA, Truong TT, Towle VR, Kerins G, Chaudhry SI. Cognitive impairment in older adults with heart failure: prevalence, documentation, and impact on outcomes. Am J Med 2013;126:120-6.
    • (2013) Am J Med , vol.126 , pp. 120-126
    • Dodson, J.A.1    Truong, T.T.2    Towle, V.R.3    Kerins, G.4    Chaudhry, S.I.5
  • 46
    • 84873468898 scopus 로고    scopus 로고
    • Impact of social factors on risk of readmission or mortality in pneumonia and heart failure: Systematic review
    • Calvillo-King L, Arnold D, Eubank KJ, Lo M, Yunyongying P, Stieglitz H, et al. Impact of social factors on risk of readmission or mortality in pneumonia and heart failure: systematic review. J Gen Intern Med 2013;28:269-82.
    • (2013) J Gen Intern Med , vol.28 , pp. 269-282
    • Calvillo-King, L.1    Arnold, D.2    Eubank, K.J.3    Lo, M.4    Yunyongying, P.5    Stieglitz, H.6
  • 49
    • 38049143764 scopus 로고    scopus 로고
    • ICD-10 codes are a valid tool for identification of pneumonia in hospitalized patients aged > or = 65 years
    • Skull SA, Andrews RM, Byrnes GB, Campbell DA, Nolan TM, Brown GV, et al. ICD-10 codes are a valid tool for identification of pneumonia in hospitalized patients aged > or = 65 years. Epidemiol Infect 2008;136:232-40.
    • (2008) Epidemiol Infect , vol.136 , pp. 232-240
    • Skull, S.A.1    Andrews, R.M.2    Byrnes, G.B.3    Campbell, D.A.4    Nolan, T.M.5    Brown, G.V.6


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.