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Walter Reed National Military Medical Center

2 ARTICLES PUBLISHED IN JoVE

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Medicine

Inverse Probability of Treatment Weighting (Propensity Score) using the Military Health System Data Repository and National Death Index
Joshua D. Mitchell 1, Brian F. Gage 2, Nicole Fergestrom 3, Eric Novak 1, Todd C. Villines 4
1Cardiovascular Division, Washington University School of Medicine, 2General Medical Sciences, Washington University School of Medicine, 3Center for Advancing Population Science, Medical College of Wisconsin, 4Cardiology Service, Department of Medicine, Walter Reed National Military Medical Center

When randomized controlled trials are not feasible, a comprehensive health care data source like the Military Health System Data Repository provides an attractive alternative for retrospective analyses. Incorporating mortality data from the national death index and balancing differences between groups using propensity weighting helps reduce biases inherent in retrospective designs.

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Neuroscience

Cerebrovascular Reactivity Measurement with Functional Near Infrared Spectroscopy
Franck Amyot 1, Cora Davis 1, Mike Sangobowale 4, Carol Moore 2, Erika Silverman 4, Amir Gandjbakhche 3, Ramon Diaz-Arrastia 4, Kimbra Kenney 1,2
1National Intrepid Center of Excellence, Walter Reed National Military Medical Center, 2Uniformed Services University of the Health Sciences, 3The Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 4University of Pennsylvania Perelman School of Medicine

Presented here is a protocol for imaging and measurement of cerebrovascular reactivity in humans with functional Near Infrared Spectroscopy (fNIRS). fNIRS is a novel imaging modality that captures the concentration changes of hemoglobin species in the brain’s outermost cortex under specific stimuli.

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