Harmonization summary
1 label-stable codes
- Label changes detected
- 0
- Multiple dataset contexts
- 0
- Unique codes
- 1
- Enriched codes in this report
- 0
Praxis Data Lab · Variable History
Variable history and harmonization report.
Review variable definitions, cycle chronology, survey design, laboratory methods, method-change boundaries, detection limits, and evidence-backed harmonization actions.
1matching variable codes
3 release records across 3 datasets and 3 cycles.
Search scope
Results for “BPD058”
Scientific safeguard
Qualified assessment is authoritative; chronology remains supporting evidence.
Praxis separates source-stated method or instrument changes from automated differences in CDC/NCHS method text. The qualified harmonization assessment below is the researcher-facing conclusion; method chronology explains the underlying evidence and does not override that adjudication.
Variable-by-variable chronology
Qualified harmonization assessment and indexed evidence
Each variable first shows the current qualified assessment used by Study Builder, followed by cycle-specific source evidence and method chronology.
BPD058Compatible with harmonization
How often {did you check your/did SP check his/her} blood pressure at home during the last 12 months?
- Observed years
- 2009–2014
- Release records
- 3
- Datasets
- 3
- Components
- Questionnaire
Qualified Praxis harmonization assessment
Compatible with harmonization · moderate confidence
No blocking method discontinuity is identified inside the selected cycle span, but one or more longitudinal changes require explicit harmonization conditions before pooling.
Evidence provenance: Praxis automated inference from indexed CDC/NCHS evidence
Relevant boundaries: 2009-2010 → 2011-2012 · 2011-2012 → 2013-2014
Praxis harmonization actions
- Verify merge grain, companion variables, and component-specific analytic guidance for the new file context.
Supporting CDC/NCHS evidence
Variable names / labels over time
- How often {did you check your/did SP check his/her} blood pressure at home during the last 12 months? — 2009-2010 · 2011-2012 · 2013-2014
Cycle-by-cycle release history
- 2009-2010: BPQ_F — How often {did you check your/did SP check his/her} blood pressure at home during the last 12 months? — Blood Pressure & Cholesterol (Questionnaire)
- 2011-2012: BPQ_G — How often {did you check your/did SP check his/her} blood pressure at home during the last 12 months? — Blood Pressure & Cholesterol (Questionnaire)
- 2013-2014: BPQ_H — How often {did you check your/did SP check his/her} blood pressure at home during the last 12 months? — Blood Pressure & Cholesterol (Questionnaire)