In-Hospital Morbidity and Mortality after Endovascular Treatment of Unruptured Intracranial Aneurysms in the United States, 1996–2000: Effect of Hospital and Physician Volume

References

1. ↵
   Luft HS, Garnick DW, Mark DH, McPhee SJ. Hospital Volume, Physician Volume, and Patient Outcomes. Ann Arbor: Health Administration Press Perspectives;1990
2. ↵
   Hewitt M. Interpreting the Volume-Outcome Relationship in the Context of Health Care Quality: Workshop Summary. Washington: National Academy Press;2000
3. ↵
   Begg CB, Cramer LD, Hoskins WJ, Brennan MF. Impact of hospital volume on operative mortality for major cancer surgery. JAMA 1998;280:1747–1751

   CrossRefPubMedWeb of Science
4. ↵
   Hillner BE, Smith TJ, Desch CE. Hospital and physician volume or specialization and outcomes in cancer treatment: importance in quality of cancer care. J Clin Oncol 2000;18:2327–2340

   Abstract/FREE Full Text
5. ↵
   Birkmeyer JD, Siewers AE, Finlayson EV, et al. Hospital volume and surgical mortality in the United States. N Engl J Med 2002;346:1128–1137

   CrossRefPubMedWeb of Science
6. ↵
   Cronenwett JL, Birkmeyer JD, Cronenwett JL, Birkmeyer JD. The Dartmouth Atlas of Vascular Health Care. Chicago: American Hospital Publishing;2000
7. ↵
   Chyatte D, Porterfield R. Functional outcome after repair of unruptured intracranial aneurysms. J Neurosurg 2001;94:417–421

   CrossRefPubMed
8. ↵
   Solomon RA, Mayer SA, Tarmey JJ. Relationship between the volume of craniotomies for cerebral aneurysm performed at New York state hospitals and in-hospital mortality. Stroke 1996;27:13–17

   Abstract/FREE Full Text
9. ↵
   Barker FG II, Amin-Hanjani S, Butler WE, Ogilvy CS, Carter BS . In-hospital mortality and morbidity after surgical treatment of unruptured intracranial aneurysms in the United States, 1996–2000: the effect of hospital and surgeon volume. Neurosurgery 2003;52:995–1009

   CrossRefPubMedWeb of Science
10. ↵
    Bardach NS, Zhao S, Gress DR, Lawton MT, Johnston SC. Association between subarachnoid hemorrhage outcomes and number of cases treated at California hospitals. Stroke 2002;33:1851–1856

    Abstract/FREE Full Text
11. ↵
    Taylor CL, Yuan Z, Selman WR, Ratcheson RA, Rimm AA. Mortality rates, hospital length of stay, and the cost of treating subarachnoid hemorrhage in older patients: institutional and geographical differences. J Neurosurg 1997;86:583–588

    CrossRefPubMedWeb of Science
12. ↵
    Steiner C, Elixhauser A, Schnaier J. The healthcare cost and utilization project: an overview. Eff Clin Pract 2002;5:143–151

    PubMed
13. ↵
    Johnston SC, Dudley RA, Gress DR, Ono L. Surgical and endovascular treatment of unruptured cerebral aneurysms at university hospitals. Neurology 1999;52:1799–1805

    Abstract/FREE Full Text
14. ↵
    Moses LE, Emerson JD, Hosseini H. Analyzing data from ordered categories. In Bailar JC III, Mosteller F, eds. Medical Uses of Statistics. Boston: New England Journal of Medicine Books;1992 :259–279
15. McCullagh P, Nelder JA. Generalized Linear Models. 2nd ed. London: Chapman & Hall;1989
16. ↵
    Strömberg U. Collapsing ordered outcome categories: a note of concern. Am J Epidemiol 1996;144:421–424

    CrossRefPubMedWeb of Science
17. ↵
    Elixhauser A, Steiner C, Harris DR, Coffey RM. Comorbidity measures for use with administrative data. Med Care 1998;36:8–27

    CrossRefPubMedWeb of Science
18. ↵
    Hosmer DW Jr, Lemeshow S. Applied Logistic Regression. 2nd ed. New York: John Wiley & Sons;2000
19. McCullagh P. Regression models for ordinal data. J R Stat Soc [Ser B] 1980;42:109–142
20. ↵
    Harrell FE Jr. Regression Modeling Strategies: With Applications to Linear Models, Logistic Regression, and Survival Analysis. New York: Springer-Verlag;2001
21. ↵
    Raudenbush S, Bryk A, Cheong YF, Congdon R. HLM 5: Hierarchical Linear and Nonlinear Modeling. Lincolnwood: Scientific Software International;2001
22. ↵
    Altman DG, Lausen B, Sauerbrei W, Schumacher M. Dangers of using “optimal” cutpoints in the evaluation of prognostic factors. J Natl Cancer Inst 1994;86:829–835

    CrossRefPubMedWeb of Science
23. ↵
    Mazumdar M, Glassman JR. Categorizing a prognostic variable: review of methods, code for easy implementation and applications to decision-making about cancer treatments. Stat Med 2000;19:113–132

    CrossRefPubMedWeb of Science
24. ↵
    Efron B, Tibshirani RJ. An Introduction to the Bootstrap. London: Chapman & Hall;1993
25. ↵
    Harrell FE Jr. Hmisc and Design libraries for S-Plus for Windows. 2000; Software and electronic documentation available from http://hesweb1.med.virginia.edu/biostat/s/splus.html
26. ↵
    Johnston SC, Zhao S, Dudley RA, Berman MF, Gress DR. Treatment of unruptured cerebral aneurysms in California. Stroke 2001;32:597–605

    Abstract/FREE Full Text
27. ↵
    Johnston SC. Effect of endovascular services and hospital volume on cerebral aneurysm treatment outcomes. Stroke 2000;31:111–117

    Abstract/FREE Full Text
28. ↵
    International Study of Unruptured Intracranial Aneurysms Investigators. Unruptured intracranial aneurysms: risk of rupture and risks of surgical intervention. N Engl J Med 1998;339:1725–1733

    CrossRefPubMedWeb of Science
29. ↵
    King JT Jr, Berlin JA, Flamm ES. Morbidity and mortality from elective surgery for asymptomatic, unruptured, intracranial aneurysms: a meta-analysis. J Neurosurg 1994;81:837–842

    CrossRefPubMedWeb of Science
30. Raaymakers TW, Rinkel GJ, Limburg M, Algra A. Mortality and morbidity of surgery for unruptured intracranial aneurysms: a meta-analysis. Stroke 1998;29:1531–1538

    Abstract/FREE Full Text
31. ↵
    Brilstra EH, Rinkel GJ, van der Graaf Y, van Rooij WJ, Algra A. Treatment of intracranial aneurysms by embolization with coils: a systematic review. Stroke 1999;30:470–476

    Abstract/FREE Full Text
32. ↵
    Shaheen NJ, Crosby MA, Bozymski EM, Sandler RS. Is there publication bias in the reporting of cancer risk in Barrett’s esophagus? Gastroenterology 2000;119:333–338

    CrossRefPubMedWeb of Science
33. Song F, Eastwood AJ, Gilbody S, Duley L, Sutton AJ. Publication and related biases. Health Technol Assess 2000;4:1–115

    PubMed
34. ↵
    Sutton AJ, Duval SJ, Tweedie RL, Abrams KR, Jones DR. Empirical assessment of effect of publication bias on meta-analyses. BMJ 2000;320:1574–1577

    Abstract/FREE Full Text
35. ↵
    Johnston SC. Identifying confounding by indication through blinded prospective review. Am J Epidemiol 2001;154:276–284

    CrossRefPubMedWeb of Science
36. ↵
    Johnston SC, Wilson CB, Halbach VV, et al. Endovascular and surgical treatment of unruptured cerebral aneurysms: comparison of risks. Ann Neurol 2000;48:11–19

    CrossRefPubMedWeb of Science
37. ↵
    Lawthers AG, McCarthy EP, Davis RB, Peterson LE, Palmer RH, Iezzoni LI. Identification of in-hospital complications from claims data: is it valid? Med Care 2000;38:785–795

    CrossRefPubMedWeb of Science
38. ↵
    Solomon RA, Fink ME, Pile-Spellman J. Surgical management of unruptured intracranial aneurysms. J Neurosurg 1994;80:440–446

    CrossRefPubMedWeb of Science
39. ↵
    Friedman JA, Piepgras DG, Pichelmann MA, Hansen KK, Brown RD Jr, Wiebers DO. Small cerebral aneurysms presenting with symptoms other than rupture. Neurology 2001;57:1212–1216

    Abstract/FREE Full Text
40. ↵
    Best WR, Khuri SF, Phelan M, et al. Identifying patient preoperative risk factors and postoperative adverse events in administrative databases: results from the Department of Veterans Affairs National Surgical Quality Improvement Program. J Am Coll Surg 2002;194:257–266

    CrossRefPubMedWeb of Science
41. ↵
    Romano PS, Roos LL, Luft HS, Jollis JG, Doliszny K. A comparison of administrative versus clinical data: coronary artery bypass surgery as an example: Ischemic Heart Disease Patient Outcomes Research Team. J Clin Epidemiol 1994;47:249–260

    CrossRefPubMedWeb of Science
42. McCarthy EP, Iezzoni LI, Davis RB, et al. Does clinical evidence support ICD-9-CM diagnosis coding of complications? Med Care 2000;38:868–876

    CrossRefPubMedWeb of Science
43. Iezzoni LI. Assessing quality using administrative data. Ann Intern Med 1997;127:666–674

    PubMedWeb of Science
44. ↵
    Iezzoni LI, Daley J, Heeren T, et al. Identifying complications of care using administrative data. Med Care 1994;32:700–715

    CrossRefPubMedWeb of Science
45. ↵
    Higashida RT, Justason BJ, Clark M, et al. Endovascular treatment of unruptured cerebral aneurysms may lead to improved outcomes and lower hospital resource use [abst]. Presented at the 41st Annual Meeting of the American Society of Neuroradiology, Vancouver, B.C., Canada,2002
46. ↵
    Couture DE, Ellegala DB, Dumont AS, Mintz PD, Kassell NF. Blood use in cerebrovascular neurosurgery. Stroke 2002;33:994–997

    Abstract/FREE Full Text
47. ↵
    Le Roux PD, Elliott JP, Winn HR. Blood transfusion during aneurysm surgery. Neurosurgery 2001;49:1068–1075

    CrossRefPubMed
48. ↵
    Goddard AJ, Annesley-Williams D, Gholkar A. Endovascular management of unruptured intracranial aneurysms: does outcome justify treatment? J Neurol Neurosurg Psychiatry 2002;72:485–490

    Abstract/FREE Full Text
49. Regli L, Uske A, de Tribolet N. Endovascular coil placement compared with surgical clipping for the treatment of unruptured middle cerebral artery aneurysms: a consecutive series. J Neurosurg 1999;90:1025–1030

    CrossRefPubMedWeb of Science
50. ↵
    Roy D, Milot G, Raymond J. Endovascular treatment of unruptured aneurysms. Stroke 2001;32:1998–2004

    Abstract/FREE Full Text
51. ↵
    Singh V, Gress DR, Higashida RT, Dowd CF, Halbach VV, Johnston SC. The learning curve for coil embolization of unruptured intracranial aneurysms. AJNR Am J Neuroradiol 2002;23:768–771

    Abstract/FREE Full Text
52. ↵
    Wanke I, Doerfler A, Dietrich U, et al. Endovascular treatment of unruptured intracranial aneurysms. AJNR Am J Neuroradiol 2002;23:756–761

    Abstract/FREE Full Text
53. ↵
    Ng P, Khangure MS, Phatouros CC, Bynevelt M, ApSimon H, McAuliffe W. Endovascular treatment of intracranial aneurysms with Guglielmi detachable coils: analysis of midterm angiographic and clinical outcomes. Stroke 2002;33:210–217

    Abstract/FREE Full Text
54. ↵
    Johnston SC. Combining ecological and individual variables to reduce confounding by indication: case study: subarachnoid hemorrhage treatment. J Clin Epidemiol 2000;53:1236–1241

    CrossRefPubMedWeb of Science
55. ↵
    Doerfler A, Wanke I, Egelhof T, et al. Aneurysmal rupture during embolization with Guglielmi detachable coils: causes, management, and outcome. AJNR Am J Neuroradiol 2001;22:1825–1832

    Abstract/FREE Full Text
56. Levy E, Koebbe CJ, Horowitz MB, et al. Rupture of intracranial aneurysms during endovascular coiling: management and outcomes. Neurosurgery 2001;49:807–813

    CrossRefPubMedWeb of Science
57. ↵
    McDougall CG, Halbach VV, Dowd CF, Higashida RT, Larsen DW, Hieshima GB. Causes and management of aneurysmal hemorrhage occurring during embolization with Guglielmi detachable coils. J Neurosurg 1998;89:87–92

    CrossRefPubMedWeb of Science
58. ↵
    Hughes RG, Hunt SS, Luft HS. Effects of surgeon volume and hospital volume on quality of care in hospitals. Med Care 1987;25:489–503

    CrossRefPubMedWeb of Science
59. Luft HS, Bunker JP, Enthoven AC. Should operations be regionalized? the empirical relation between surgical volume and mortality. N Engl J Med 1979;301:1364–1369

    CrossRefPubMedWeb of Science
60. ↵
    Luft HS, Hunt SS, Maerki SC. The volume-outcome relationship: practice-makes-perfect or selective-referral patterns? Health Serv Res 1987;22:157–182

    PubMedWeb of Science
61. ↵
    Finlayson EV, Birkmeyer JD. Outcomes in vascular surgery: volume versus certification. Surgery 2001;130:897–898

    PubMed
62. Hannan EL, Popp AJ, Feustel P, et al. Association of surgical specialty and processes of care with patient outcomes for carotid endarterectomy. Stroke 2001;32:2890–2897

    Abstract/FREE Full Text
63. O’Neill L, Lanska DJ, Hartz A. Surgeon characteristics associated with mortality and morbidity following carotid endarterectomy. Neurology 2000;55:773–781

    Abstract/FREE Full Text
64. Dudley RA, Johansen KL, Brand R, Rennie DJ, Milstein A. Selective referral to high-volume hospitals: estimating potentially avoidable deaths. JAMA 2000;283:1159–1166

    CrossRefPubMedWeb of Science
65. ↵
    Wennberg DE, Lucas FL, Birkmeyer JD, Bredenberg CE, Fisher ES. Variation in carotid endarterectomy mortality in the Medicare population: trial hospitals, volume, and patient characteristics. JAMA 1998;279:1278–1281

    CrossRefPubMedWeb of Science
66. ↵
    Albright AL, Sposto R, Holmes E, et al. Correlation of neurosurgical subspecialization with outcomes in children with malignant brain tumors. Neurosurgery 2000;47:879–877

    PubMedWeb of Science
67. ↵
    Sanford RA. Craniopharyngioma: results of survey of the American Society of Pediatric Neurosurgery. Pediatr Neurosurg 1994;21:39–43

    CrossRefPubMedWeb of Science
68. ↵
    Kagan RJ, Baker RJ. The impact of the volume of neurotrauma experience on mortality after head injury. Am Surg 1994;60:394–400

    PubMedWeb of Science
69. ↵
    Vakili BA, Kaplan R, Brown DL. Volume-outcome relation for physicians and hospitals performing angioplasty for acute myocardial infarction in New York state. Circulation 2001;104:2171–2176

    Abstract/FREE Full Text
70. Birkmeyer JD, Finlayson EV, Birkmeyer CM. Volume standards for high-risk surgical procedures: potential benefits of the Leapfrog initiative. Surgery 2001;130:415–422

    CrossRefPubMedWeb of Science
71. ↵
    McGrath PD, Wennberg DE, Dickens JD Jr, et al. Relation between operator and hospital volume and outcomes following percutaneous coronary interventions in the era of the coronary stent. JAMA 2000;284:3139–3144

    CrossRefPubMedWeb of Science
72. Kimmel SE, Sauer WH, Brensinger C, Hirshfeld J, Haber HL, Localio AR. Relationship between coronary angioplasty laboratory volume and outcomes after hospital discharge. Am Heart J 2002;143:833–840

    CrossRefPubMedWeb of Science
73. ↵
    Hannan EL, Racz M, Ryan TJ, et al. Coronary angioplasty volume-outcome relationships for hospitals and cardiologists. JAMA 1997;277:892–898

    CrossRefPubMedWeb of Science
74. Phillips KA, Luft HS, Ritchie JL. The association of hospital volumes of percutaneous transluminal coronary angioplasty with adverse outcomes, length of stay, and charges in California. Med Care 1995;33:502–514

    CrossRefPubMedWeb of Science
75. Kimmel SE, Berlin JA, Laskey WK. The relationship between coronary angioplasty procedure volume and major complications. JAMA 1995;274:1137–1142

    CrossRefPubMedWeb of Science
76. ↵
    Ritchie JL, Phillips KA, Luft HS. Coronary angioplasty: statewide experience in California. Circulation 1993;88:2735–2743

    Abstract/FREE Full Text
77. ↵
    Kassell NF, Torner JC, Haley EC Jr, Jane JA, Adams HP, Kongable GL. The International Cooperative Study on the Timing of Aneurysm Surgery: part 1. overall management results. J Neurosurg 1990;73:18–36

    CrossRefPubMedWeb of Science
78. ↵
    Taylor B, Harries P, Bullock R. Factors affecting outcome after surgery for intracranial aneurysm in Glasgow. Br J Neurosurg 1991;5:591–600

    CrossRefPubMed
79. ↵
    Murayama Y, Viñuela F, Duckwiler GR, Gobin YP, Guglielmi G. Embolization of incidental cerebral aneurysms by using the Guglielmi detachable coil system. J Neurosurg 1999;90:207–214

    CrossRefPubMedWeb of Science
80. ↵
    Malisch TW, Guglielmi G, Viñuela F, et al. Intracranial aneurysms treated with the Guglielmi detachable coil: midterm clinical results in a consecutive series of 100 patients. J Neurosurg 1997;87:176–183

    CrossRefPubMedWeb of Science