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Rights & Permissions Free Resources Display this book on your site! Related Titles Medicare:A Strategy for Quality Assurance, Volume I Preventing Medication Errors: Quality Chasm Series Other Related Titles Reliability of Medicare Hospital Discharge Records: Report of a Study (1977) Institute of Medicine (IOM) Citation Manager Export the bibliographic data for this book in your chosen format Web Search Builder Use this book's key terms to search within this book, across our collection, or across the Web. Skim This Chapter Skim this chapter and use this chapter's key terms to search within this book. Reference Finder Paste in your own text to find books that relate to your topic. Citation Manager . "Appendix L Standard Errors and Confidence Intervals for Statistics Based on Data from Private Abstracting Services." Reliability of Medicare Hospital Discharge Records: Report of a Study. Washington, DC: The National Academies Press, 1977. Please select a format: Page 132   E-mail Share on facebook Facebook Share on delicious Delicious Share on stumbleupon Stumble Share on twitter Twitter More Sharing ServicesMore Page 132 Front Matter (R1-R6) Table of Contents (R7-R8) Foreword (R9-R10) Introduction (1-4) Study Methods (5-22) Analysis (23-60) Summary and Recommendations (61-70) Appendix A Bibliography (71-72) Appendix B Sample Letter to Hospital Administrators (73-74) Appendix C Diagnostic Codes Included as Components of the Sample of Medicare Records (75-84) Appendix D IOM Re-abstracting Form, General Instructions for Field Team, and Specific Instructions for IOM Re-abstracting Form (85-104) Appendix E Informal Checklist (105-106) Appendix F Reliability of Field Work (107-114) Appendix G Percent of Abstracts with no Discrepancy for each Diagnosis Included as a Component of the Sample of Medicare Records (115-120) Appendix H Net and Gross Difference Rates in Designation of Principal Diagnosis (Based on Four-Digit Comparisons of Specific Diagnosis) (121-124) Appendix I General Comparison of Assessment of the Reliability of Medicare Records Maintained by the Health Care Financing Administration and Hospital Discharge Abstracts Compiled by Private Abstract Services (125-126) Appendix J Comparison of the Reliability of HCFA Medicare Records and Private Abstract Service Medicare Abstracts for Selected Diagnoses Common to both Studies (127-128) Appendix K Standard Errors and Confidence Intervals for Statistics Based on Medicare Data (129-131) Appendix L Standard Errors and Confidence Intervals for Statistics Based on Data from Private Abstracting Services (132-133) Appendix M Selected Examples of Principal Procedures not Listed in CPT, as Determined by the IOM Field Team Members (134-134)

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OCR for page 132
Appendix L STANDARD ERRORS ANI) CONFIDENCE: INTERVALS FOR STATI STI CS BASIN) ON ~ ~ DATA FROlI PRIVATE- ABSTRACTING - SERVICES ~ - - Polnt Standard Confidence Statistic - - ~ ~ ~ estimate ~ - error ~ ~ interval Percent of abstracts 65 .20 1 . 14 63 . 32-67 .08 with no discrepancy f or princ Opal diag- nos is coded to four- dig its Percent of abstracts 73.20 1.53 70.68-75.72 with no dis crepancy for princ ipal pro- cedu re 132

OCR for page 133
Agnes is ~ ~ 1 _ _ 133 Append ix L STANDARD ERRORS AND CONFIDENCE INTERVALS FOR NET DIFFERENCE RATES ~ TIMES 100) ~ BASED ~ ON ~ DATA- FROM- PRIVATE ABSTRACTING ~ SERVICES ~ ~ _ ~ Point Standard estimate - - error . . . . . Confidence interval ~ Cerebrovascular 1.07 0.27 0.62-1.52 diseases Chronic ischemic -2.24 0.48 -3.03--1.65 heart disease Acute myocardial 0.86 0.08 0.78-0.94 infarction Diabetes mellitus 0.09 0.33 -0.06-0.24 Carcinoma of the breast -0.10 0.04 -0.17-0.03 End stage renal disease 0.04 0.02 0.01-0.07 Cholelithiasis/ 0.31 0.13 0.10-0.52 cholecyst it is Hernia without -0.02 0.04 -0.09-0.05 obstruction Delivery 0.23 0.05 0.15-0.31 Hypertrophy of tonsils and adenoids -0.01 0.02 -0.04-0.02 Fracture of neck of 0.34 0.12 0.14-0.54 femur Displacement of inter- 0.10 0.06 0.00-0.20 vertebral disc Cataract 0.18 0.10 0.01-0.35 Neuroses 0.09 0.13 -0.12-0.30 d

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disease acute