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CONTENTS FOREW ORD INTRODUCT ION STUDY METHODS ANALYS IS SUMMARY AND RECOMMENDAT IONS APPENDICES 1X 1 5 23 61 A. Bib 1 iography 71 B. Sample Letter to Hospital Administrators 73 C. Diagnostic Codes Included as Components of the Sample of Medicare Records 75 D. IOM Re-abstracting Form, General Instructions for F ie id Team, and Spec i f ic Ins true t ions f or IOM Re - ab s t r ac t ing Form 85 E. Informal Checklist 105 F. Reliability of Field Work 107 G. Percent of Abstracts with no Discrepancy for each Diagnosis Included as a Component of the Sample of Med ic are Records 115 H. Net and Gross Difference Rates in Designation 0 f Pr inc i pal D iagno s i s ~ Ba s ed on Four-Dig i t Comparisons of Specific Diagnoses) 121 General Comparison of Assessments of the Reliability of Medicare Records Maintained by the Health Care Financing Administration and Hospital Discharge Abstracts Compiled by Private Abstract Serv ices @ . V11 125
J. Comparison of the Reliability of HCFA Medicare Records and Private Abstract Service Medicare Ab s t r ac t s to r Se 1 ec ted Di agno se s Common to ho th Stud ies 127 K. Standard Errors and Confidence Interval s for Statistics Based on Medicare Data 129 Standard Errors and Confidence Interval s for Statistics Based on Data from Private Abstracting Services 132 M. Selected Examples of Principal Procedures not Li sted in CPT, as Determined by the IOM Field Team Members 134 · . . vale
