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  • Data Knowledge Base
  • Data Sharing
    • Revision History
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    • Lessons Learned
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      • Play 1: Sharing Metrics
      • Play 2: Identify
      • Play 3: Business Case
      • Play 4: Prioritize
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    • Data Element Definitions
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    • Business Case Creation
      • Determining Goals and Strategy
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  • 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
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    • Open Data: Purpose
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    • Governance
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  • Appendix
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    • Data Tools
    • Data Discovery Sessions
    • Data Sharing Benefits
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  1. Data De-Identification
  2. 4. Statistical De-Identification

4.2 Numerator - Denominator Condition

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Last updated 4 months ago

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The Numerator – Denominator Condition represents a combination of both the Numerator Condition and Denominator Condition and for which both conditions must be met or else a more detailed assessment is required. This may be considered as an initial screening of a data set.

The Numerator Condition sets a lower limit for the cell size of cells displayed in a table. The DDG has set this limit as any value representing aggregated or summarized records which are derived from less than 11 individuals (clients). Of note, values of zero (0) are typically shown since a non-event cannot be identified.

The Denominator Condition sets a minimum value for the denominator. The DDG has identified the lower limit for the denominator to be a minimum value of 20,000.

Since this is a Numerator – Denominator Condition, both the minimum cell size for the numerator and denominator must be met. If these conditions are met, the table can move to Step 5 for consideration for release to the public. If either the numerator of denominator condition is not met, then the review of the data must proceed to Step 3.