Sentinel Distributed Database (SDD) Statistics Summary: 2000-2021
The Sentinel Distributed Database has a total of 365.1 million unique patient identifiers spanning the 2000 to 2022 time period. If patients move between health plans, they may have more than one patient identifier. 239.2 million patients have at least one day of drug and medical coverage.
Of those with both medical and drug coverage, there are:
- 63.3 million members currently accruing new data
- 844 million person-years of data
- 16.7 billion pharmacy dispensings
- 15.7 billion unique medical encounters
- 45.3 million members with at least one laboratory test result
Additionally, the Sentinel Distributed Database contains 5.8 million deliveries with a mother-infant linkage.
How Mother-Infant Linkage was Created
The Sentinel Common Data Model (SCDM) includes a Mother-Infant Linkage (MIL) table that enables the routine evaluation of medical product exposures during pregnancy on outcomes observed during infancy. Mothers and infants are matched mainly on family subscriber numbers and, when available, birth certificate data. Most matches were deterministic, though probabilistic matching methods were also used by some Data Partners. More information about the MIL table may be found in the Mother-Infant Linkage FAQ.
Sentinel's algorithm for determining linkage with an infant requires an assignment of an infant patient identifier within the first year of life. Potential Linkages are discarded if an infant patient identifier is not assigned within one year of the linkage date. Therefore, data in 2021 is incomplete because a full year of eligibility for linkage has not elapsed at all Data Partners.
The Sentinel Distributed Database has:
- 4 Data Partners populating the MIL table
- 5,771,390 linked deliveries
- 79.0% linkage rate
Last updated: 07/05/22