Exact(1)
Whenever possible, data collection should include small-area markers (such as postal codes) or identifiers (such as personal identification numbers) that permit linkages between data sources.
Similar(59)
Details of children born to these women were obtained from the National Central Population Register CPRR), which was established in 1968 with all citizens having unique personal identification numbers that permit linkage between registers.
Given the large number of private providers in the study cities and a lack of a systematic list of these providers, our approach ensures that we survey the facilities and providers where women in our study sample actually said they went for reproductive health services, thus permitting linkages between the household and facility-level surveys.
Stored with the data is the national registration number (a unique personal identifier assigned to all Swedish residents) that permits linkage between registers.
All Danish residents have a unique personal identification number (the Civil Registration Number, which incorporates date of birth and gender) used for all health contacts, that permits linkage between health administrative registries [ 19].
This spatial information at the cluster level provides the geographic location where the affected child lives at the time of the survey and also permits linkage between DHS determinants of childhood diseases and information from other data sets.
Cross-sections permit linkage of external shapes with internal stratification patterns.
Last, GPRD did not (at the time of analysis) permit linkage with hospital data.
Interview data did not permit linkage with identities of index cases.
Use of this number permits data linkage between registries.
The patient code in each database permitted electronic linkage between all databases.
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