Development of an ICD Coding Definition for Inflammatory Bowel ...

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List of Figures and Diagrams Figure 1. Distribution of the procedures that were considered as IBD among indication, findings, and impression fields..............................................................33 Figure 2. . Distribution of the procedures that were considered as —possible IBD“ among indication, findings, and impression fields ..................................................33 Figure 3. Annual increase in the number of admissions among our cohort of patients irrespective of diagnosis.........................................................................................35 Figure 4. Annual increase in the number of admissions with a diagnosis of IBD............35 Diagram 1. Number of admissions and IBD diagnostic codes in IBD and non-IBD patients. .................................................................................................................36 Diagram 2. Frequency of physician claims and IBD diagnostic codes among IBD patients. .................................................................................................................37 Diagram 3. Frequency of physician claims and IBD diagnostic codes among non-IBD patients. .................................................................................................................38 Diagram 4. Frequency of ACCS contacts and IBD diagnostic codes among IBD and non-IBD patients....................................................................................................39 Diagram 5. Number of hospitalizations and IBD diagnostic codes in IBD and non- IBD patients after final classification....................................................................107 Diagram 6. Frequency of physician claims and IBD diagnostic codes among IBD patients after final classification. ..........................................................................108 Diagram 7. Frequency of physician claims and IBD diagnostic codes among non-IBD patients after final classification. ..........................................................................109 Diagram 8. Frequency of ACCS contacts and IBD diagnostic codes among IBD and non-IBD patients after final classification. ...........................................................110 x
List of Abbreviations Symbol Definition ACCS Ambulatory Care classification system database AHCIP Alberta health care insurance plan CD Crohn‘s disease FN False negative FP False positive FY Fiscal year IBD Inflammatory bowel disease IC Indeterminate colitis IP Hospital (inpatient) discharge abstract database NPV Negative predictive value PC Physician claims database PHN Personal health number PPV Positive predictive value Sn Sensitivity Sp Specificity TN True negative TP True positive UC Ulcerative colitis xi
Page 1 and 2: UNIVERSITY OF CALGARY DEVELOPMENT O
Page 3 and 4: Abstract INTRODUCTION: To facilitat
Page 5 and 6: Dedication To my parents and my sis
Page 7 and 8: 4.3.1 Computerized search..........
Page 9: List of Tables Table1. Incidence an
Page 13 and 14: Chapter One: INTRODUCTION Crohn‘s
Page 15 and 16: 2.1 Inflammatory Bowel disease Chap
Page 17 and 18: are usually apparent. Potentially l
Page 19 and 20: Incidence and prevalence rates of I
Page 21 and 22: contact in 1989 or later, to allow
Page 23 and 24: significant condition of the patien
Page 25 and 26: Young et al.[36] found that agreeme
Page 27 and 28: 3.1 Significance Chapter Three: Sig
Page 29 and 30: 4.1 Summarized design Chapter Four:
Page 31 and 32: 4.2.4 Ambulatory Care Classificatio
Page 33 and 34: 4.4 Retrieving the personal health
Page 35 and 36: 4.7 Preliminary development of the
Page 37 and 38: Each time frame 1 (i.e. ”t‘ in
Page 39 and 40: 4.7.1 Sensitivity Sensitivity (true
Page 41 and 42: hospitals were reviewed for each pa
Page 43 and 44: final two definitions was founded o
Page 45 and 46: Figure 1. Distribution of the proce
Page 47 and 48: 5.4.1 IP database (FY 1994 œ FY 20
Page 49 and 50: 5.4.2 PC database (FY 1995 œ FY 20
Page 51 and 52: Diagram 4. Frequency of ACCS contac
Page 53 and 54: Table 3. 2×2 contingency table and
Page 55 and 56: within 5 years“. Of 137 false pos
Page 57 and 58: —IP≥1 or PC≥5 or ACCS≥2 wit
Page 59 and 60: 5.6.2 False negative patients Defin
Page 61 and 62:
definitions were selected as our fi
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• Incomplete documentation of lin
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94.5% of our subjects were regarded
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prevalence of IBD in the Calgary He
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with no flare in the last 10 years
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• At least two independent and se
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FP rate (i.e. 1-specificity or ). T
Page 75 and 76:
CD, IC patients who become CD or UC
Page 77 and 78:
6.5 Limitations When extrapolating
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egions that do not have access to t
Page 81 and 82:
17. Trallori, G., et al., A populat
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APPENDIX 1. INTERNATIONAL CLASSIFIC
Page 85 and 86:
556.8 Other ulcerative colitis 556.
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• ICD-10-CA Enteritis, NOS, diete
Page 89 and 90:
APPENDIX 2. SEARCH TERMS IN ENDOPRO
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INVOLVEMENT Shade the corresponding
Page 93:
APPENDIX 4. ETHICAL APPROVAL 81
Page 96 and 97:
IP = 1 PC =3 ACCS =2 IP = 1 PC = 3
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IP = 1 PC = 5 ACCS = 2 IP = 1 PC =
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IP = 2 PC = 2 ACCS = 2 IP = 2 PC =
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IP = 2 PC = 4 ACCS = 2 IP = 2 PC =
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IP = 2 PC = 6 ACCS = 2 IP = 2 PC =
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IP = 1 PC =4 IP = 1 PC = 5 Criteria
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IP = 2 PC = 3 IP = 2 PC = 4 Criteri
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APPENDIX 7. 2×2 TABLES AND TEST CH
Page 112 and 113:
• Definition —IP≥1 or PC≥4
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
IBD patients had a median number of
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Diagram 8. Frequency of ACCS contac
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IP = 1 PC =3 ACCS =2 IP = 1 PC = 3
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IP = 1 PC = 5 ACCS = 2 IP = 1 PC =
Page 128 and 129:
IP = 2 PC = 2 ACCS = 2 IP = 2 PC =
Page 130 and 131:
IP = 2 PC = 4 ACCS = 2 IP = 2 PC =
Page 132 and 133:
IP = 2 PC = 6 ACCS = 2 IP = 2 PC =
Page 134 and 135:
IP = 1 PC =4 IP = 1 PC = 5 Criteria
Page 136 and 137:
IP = 2 PC = 3 IP = 2 PC = 4 Criteri
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APPENDIX 11. 2×2 TABLES AND TEST C
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