An observational study in Diabetes, sponsored by Brigham and Women's Hospital. Completed at 1 site in United States. Open to participants aged 18 Years to 120 Years. Per ClinicalTrials.gov, last updated 2023-07-27.
Sponsored by Brigham and Women's Hospital · Observational
Investigators are building an empirical evidence base for real world data through large-scale replication of randomized controlled trials. The investigators' goal is to understand for what types of clinical questions real world data analyses can be conducted with confidence and how to implement such studies.
This is a non-randomized, non-interventional study that is part of the RCT DUPLICATE initiative (www.rctduplicate.org) of the Brigham and Women's Hospital, Harvard Medical School. It is intended to replicate, as closely as is possible in healthcare insurance claims data, the trial listed below/above. Although many features of the trial cannot be directly replicated in healthcare claims, key design features, including outcomes, exposures, and inclusion/exclusion criteria, were selected to proxy those features from the trial. Randomization is also not replicable in healthcare claims data but was proxied through a statistical balancing of measured covariates according to standard practice. Investigators assume that the RCT provides the reference standard treatment effect estimate and that failure to replicate RCT findings is indicative of the inadequacy of the healthcare claims data for replication for a range of possible reasons and does not provide information on the validity of the original RCT finding.
10,925 studies on the registry are indexed under Diabetes Mellitus; 1,319 are open to participants now.
This study's enrollment of 101,830 is above the median of 233 across 2,220 observational studies indexed under Diabetes Mellitus.
Browse Diabetes Mellitus studies →Brigham and Women's Hospital is the lead sponsor of 1,236 studies on the registry; 224 are open to participants now.
Of its 116 completed or terminated interventional studies of FDA-regulated products, 64 (55%) have results posted.
Counted across the registry records on this site, refreshed daily.
This study will involve a new user, parallel group, cohort study design comparing linagliptin to the 2nd generation sulfonylurea (SU) antidiabetic class as a proxy for placebo. SUs are not known to have an impact on the outcome of interest. In addition, SUs were the most frequent background treatment in CARMELINA (after metformin), and DPP4i and SUs are preferentially prescribed to similarly older patients in real world (Patorno et al., 2019). The patients will be required to have continuous enrollment during the baseline period of 180 days before initiation of linagliptin or a comparator drug (cohort entry date). Follow-up for the outcome (3P-MACE), begins the day after drug initiation. As in the trial, patients are allowed to take other antidiabetic medications during study follow-up.
Please see: https://drive.google.com/drive/folders/1WD618wrywYjEaXzfLTcuK-VCcnb6b-gV for full code and algorithm definitions.
Eligible cohort entry dates Market availability of linagliptin in the U.S. started on May 2, 2011. For Marketscan and Medicare: May 2, 2011-Dec 31, 2016 (end of data availability).
For Optum: May 2, 2011-Sep 30, 2017 (end of data availability).
Inclusion Criteria:
Albuminuria (UACR ≥ 30 mg/g creatinine or ≥ 30 µg/min [microgram albumin per minute] or ≥ 30 mg/24 h [milligram albumin per 24 hours] in two out of three unrelated spot urine or timed samples in the last 24 months prior to randomization)*
AND previous macrovascular disease, defined as either one or more:
Confirmed history of MI (> 2 months prior to Visit 1)
Advanced coronary artery disease, defined by any one of the following:
The combination of prior percutaneous or surgical revascularization of 1 major coronary artery at least 2 months prior to visit 1 (screening), and ≥ 50% narrowing of the luminal diameter by coronary angiography, MRI angiography or CT angiography of at least 1 additional major coronary artery.
AND at least one of the following:
Patient discharged from hospital with a documented diagnosis of unstable angina pectoris between 2 and 12 months prior to visit 1 (screening).
angiographic evidence of peripheral artery stenosis 50% narrowing of the luminal diameter in at least one limb (definition of peripheral artery: common iliac artery, internal iliac artery, external iliac artery, femoral artery, popliteal artery).
Exclusion Criteria:
Pre-menopausal women (last menstruation 1 year prior to informed consent) who:
Reference group
Drug: Sulfonylurea
Exposure group
Drug: Linagliptin
Linagliptin dispensing claim is used as the exposure
2nd generation sulfonylurea dispensing claim is used as the reference
Relative hazard of composite outcome of Stroke, MI, and Mortality
Relative hazard of composite outcome of MI, stroke, and mortality - Please refer to uploaded protocol for full definition due to size limitations.
Time frame: Through study completion (a median of 118-123 days)
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This study is completed, as verified in Jul 2023. You cannot join it, but the record below documents what was studied.
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Brigham and Women's Hospital