Clinical care and large observational studies are characterized by periods of intense health monitoring during hospital visits followed by long periods of low-intensity or no-monitoring between visits. Data obtained during in-hospital visits come from a host of new technologies, such as very densely sampled biosignal recordings (EEG, ECG, health scores) and high resolution multi-modality imaging (MRI, CT, PET). A major characteristic of this type of data is that it is collected for a period of time that is subject-spcific. Indeed, the in-hospital length and amount of monitoring varies between subjects, and is highly informative both for studying health outcomes in the hospital and after discharge. One among many examples is a recent study of subjects admitted to the Intensive Care Unit (ICU) with Acute Respiratory Distress Syndrome (ARDS). For each subject the Sequential Organ Failure Assessment (SOFA) score, a commonly- used scoring system to measure organ dysfunction in the ICU, was collected daily for each subject for the duration of their ICU stay. The ICU length of stay is different by subject and likely to be highly informative of current and future health outcomes. In this application, a set of relevant problems are conceptualized and distilled to statistical aims to address specific complexities associated with this type of data sampling. Specifically, the proposal addresses the following fundamental unsolved problems in studies that collect high density biosignals: 1) introducing statistical models for the association between high density biosignals with uneven support and health outcomes; 2) developing functional registration-by-prediction models that transform the support of biosignals to provide best prediction of health outcomes; and 3) developing models for describing the cross-sectional and longitudinal variability of biosignals obtained in studies with rare -but intense- health monitorin. While focus lies on research studies that collect quasi- continuous ultra-high resolution biosignals for subject-specific lengths of time, methods will be generalizable to many other studies with similar data sampling structures. 2
This project provides analytic methods for biological and health signals that are measured often for unequal periods of time (e.g. disease severity scores during hospital stays, EEG data during sleep, reaching hand movement after stroke). Special emphasis is given to the study of the association between these biosignals and health outcomes. 4
| Leroux, Andrew; Xiao, Luo; Crainiceanu, Ciprian et al. (2018) Dynamic prediction in functional concurrent regression with an application to child growth. Stat Med 37:1376-1388 |
| Xiao, Luo; Li, Cai; Checkley, William et al. (2018) Fast covariance estimation for sparse functional data. Stat Comput 28:511-522 |
| Backenroth, Daniel; Goldsmith, Jeff; Harran, Michelle D et al. (2018) Modeling motor learning using heteroskedastic functional principal components analysis. J Am Stat Assoc 113:1003-1015 |
| Smirnova, Ekaterina; Ivanescu, Andrada; Bai, Jiawei et al. (2018) A practical guide to big data. Stat Probab Lett 136:25-29 |
| Chén, Oliver Y; Crainiceanu, Ciprian; Ogburn, Elizabeth L et al. (2018) High-dimensional multivariate mediation with application to neuroimaging data. Biostatistics 19:121-136 |
| Urbanek, Jacek K; Zipunnikov, Vadim; Harris, Tamara et al. (2018) Prediction of sustained harmonic walking in the free-living environment using raw accelerometry data. Physiol Meas 39:02NT02 |
| Bai, Jiawei; Sun, Yifei; Schrack, Jennifer A et al. (2018) A two-stage model for wearable device data. Biometrics 74:744-752 |
| Urbanek, Jacek K; Spira, Adam P; Di, Junrui et al. (2018) Epidemiology of objectively measured bedtime and chronotype in US adolescents and adults: NHANES 2003-2006. Chronobiol Int 35:416-434 |
| Wong, Aaron L; Goldsmith, Jeff; Forrence, Alexander D et al. (2017) Reaction times can reflect habits rather than computations. Elife 6: |
| Gertheiss, Jan; Goldsmith, Jeff; Staicu, Ana-Maria (2017) A note on modeling sparse exponential-family functional response curves. Comput Stat Data Anal 105:46-52 |
Showing the most recent 10 out of 44 publications
