CalHHS Data Knowledge Base
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  • Data Knowledge Base
  • Data Sharing
    • Revision History
    • Data Sharing Guidebook
    • Lessons Learned
    • Data Sharing Plays
      • Play 1: Sharing Metrics
      • Play 2: Identify
      • Play 3: Business Case
      • Play 4: Prioritize
      • Play 5: Metadata
      • Play 6: Describe
      • Play 7: Promote
      • Play 8: Prepare
    • Data Element Definitions
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    • Additional Training and Reference Materials
    • Business Case Creation
      • Determining Goals and Strategy
      • Implementation Details
      • Evaluating Outcomes & Impacts
      • Communicating Your Results
  • Data De-Identification
    • Revision History
    • 1. Purpose
    • 2. Background
    • 3. Scope
    • 4. Statistical De-Identification
      • 4.1 Personal Characteristics of Individuals
      • 4.2 Numerator - Denominator Condition
      • 4.3 Assess Potential Risk
      • 4.4 Statistical Masking
      • 4.5 Legal Review
      • 4.6 Departmental Release Procedure for De-Identified Data
    • 5. Types of Reporting
      • 5.1 Variables
      • 5.2 Survey Data
      • 5.3 Budgets and Fiscal Estimates
      • 5.4 Facilities, Service Locations and Providers
      • 5.5 Mandated Reporting
    • 6. Justification of Thresholds Identified
      • 6.2 Assessing Potential Risk – Publication Scoring Criteria
      • 6.3 Assessing Potential Risk – Alternate Methods
      • 6.4 Statistical Masking
    • 7. Approval Process
    • 8. DDG Governance
    • 9. Publicly Available Data
    • 10. Development Process
    • 11. Legal Framework
    • 12. Abbreviations and Acronyms
    • 13. Definitions
    • 14. References
    • Appendix A: Expert Determination Template
    • Appendix B: 2015 HIPAA Reassessment Results
    • Appendix C: State and County Population Projections
  • Open Data Handbook
    • Revision History
    • Open Data: Purpose
    • Disclosure
    • Governance
    • Guidelines
    • Use
  • Appendix
    • Glossary and Acronyms
    • Data Tools
    • Data Discovery Sessions
    • Data Sharing Benefits
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  1. Data De-Identification
  2. 6. Justification of Thresholds Identified

6.3 Assessing Potential Risk – Alternate Methods

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As noted in , the Publication Scoring Criteria is based on a framework that has been in use by the Illinois Department of Public Health, Illinois Center for Health Statistics. Various other methods have been used to assess risk and the presence of sensitive or small cells. Public health has a long history of public provision of data and many methods have been used. Some of those methods are highlighted here.

  • This method is framed around the concept that a Disclosure Limitation Standard for tabulations of confidential Ohio Department of Health data shall be suppressed when the table denominator value minus the table numerator value is less than 10.

  • that highlights many topics covered in the CalHHS DDG but also discusses the use of relative standard error (RSE) to assess reliability of data in addition to steps to take protect confidentiality.

  • which also addresses many of the same topics.

The size of numerators and denominators vary in each of the documents above although the principles are consistent.

Section 6.2