IMEDS Network Partners (NP) include a subset of the Sentinel Distributed Data Network and contribute the data and scientific expertise IMEDS leverages to conduct Post Market Required (PMR) studies. The graphs below represent data from seven network partners from 2000 through their most recently available data as of October 2021. The recency of data varied across NPs, with the most recent data available ranging from December 2019 – October 2021. Queries were run using Sentinel distributed query tools.
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This map shows the historic distribution of patients by geographic region from 2000-2021. Region is determined by their zip code on first day of their most recent enrollment span. Regions are based on the Health and Human Services (HHS) Region Descriptions. Data from Puerto Rico, Virgin Islands, American Samoa, Commonwealth of the Northern Mariana Islands, Federated States of Micronesia, Guam, Marshall Islands, and Republic of Palau are excluded from their respective HHS regions due to low cell counts.
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Age of active patients (as of the most recent data from our Network Partners in October 2021) is determined on the first day of their most recent enrollment span with both medical and drug coverage.
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This graph shows the historic distribution of sex in the IMEDS Network among those with medical and drug coverage in data pulled from 2000 to 2021.
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Historic distribution of race and ethnicity for patients that have at least one span of medical and drug coverage in data pulled from 2000 to 2021.
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The number of patients enrolled in the IMEDS Distributed Database over time spans from 2000-2021. Patients are counted if they have at least one day of medical coverage and one day of drug coverage within that year. Data in 2021 and possibly 2020 are likely to be incomplete because of varying end dates.
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The distribution of cumulative enrollment with medical and drug coverage per patient within IMEDS Network covers over 70 million patients that have been enrolled for at least six months. An enrollment span is defined as having both medical and drug coverage. Cumulative enrollment is categorizing the total length of enrollment per patient, summing multiple enrollment spans if they exist. A single patient may contribute multiple enrollment spans to the IMEDS Network.
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The previous graph is describing the number of patients within the IMEDS Network, whereas this graph shows the distribution of individual enrollment spans within the IMEDS Network. A single patient may contribute multiple enrollment spans to the IMEDS Network. Length of patient enrollment is categorizing the frequency of length of enrollment spans by enrollment record for patients with medical and drug coverage. An enrollment span is defined as having both medical and drug coverage. In this figure, gaps in coverage of less than 45 days are bridged into one enrollment span. The data visualization above shows 100M enrollment spans, which are derived from 82.6M patients.
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This graph shows the distribution of linked and unlinked deliveries over time in data pulled from 2001-2021 across three IMEDS Network Partners that contribute to the Sentinel Mother-Infant Linkage table. The data reflects live births only.
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 Network Partners. More information about the MIL table may be found in the Mother-Infant Linkage FAQ (link: https://www.sentinelinitiative.org/sites/default/files/data/distributed-database/MIL_FAQs&Appendice…)
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.
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This graph shows the distribution of linked and unlinked deliveries by mother’s age group. The IMEDS Distributed Database contains around 9,617 linked deliveries among 10-19-year-olds, 1.495 million among 20-44-year-olds, and 146,676 among 45-54-year-olds across three IMEDS Network Partners. It is more common for mothers in the 45-54 years group to have different healthcare plans than their infants, leading to challenges in linkage. The data reflects live births only in data pulled from 2001 to 2021. .