Robert Krafty, PhD

Associate Professor, Biostatistics


7125 Public Health, 130 DeSoto St, Pittsburgh, PA 15261
R-znvy: exensgl@cvgg.rqh
Primary Phone: 967-179-7967

Personal Statement

Our research  (i) develops statistical methods and software for the analysis of time series, longitudinal, signal, and functional data from modern experimental and observational studies and (ii) advances the study of health through transdisciplinary collaborations that elucidate dynamic scientific mechanisms.  Our group explores both time and frequency domain approaches for analyzing data such as heart rate variability (HRV), EEG, fMRI, wearable devices, ecological momentary assessment (EMA), and actigraphy data. 


Examples of recent collaborative and transdisciplinary findings include insights into how cardio-metabolic health is connected to stress reactivity through sleep, how behavioral and sleep interventions can improve physical health, and both neurological and behavioral characteristics that put older adults who serve as the primary caregiver for a spouse at increased risk for depression.


2007 | University of Pennsylvania | PhD in Biostatistics
2002 | University of Pennsylvania | MA in Mathematics
2000 | SUNY at Stony Brook | BS in Mathematics and Dance


BIOST 2063 Bayesian Data Science | Spring Semester

Selected Publications

A full list of publications can be found on my CV.
* Indicates that the first author is a student under my supervision and that the work is part of his/her dissertation.

*Bruce SA, Tang CY, Hall MH and Krafty RT. (2020) "Empirical Frequency Band Analysis of Nonstationary Time Series." Journal of the American Statistical Association. In Press. [R Program]

*Beer JC, Aizenstein HJ, Anderson SJ and Krafty RT.  (2019) "Incorporating Prior Information with Fused Sparse Group Lasso: Application to Prediction of Clinical Measures from Neuroimages.” Biometrics. 75(4): 1299-1209.   [R and Matlab Programs]

*Li Z and Krafty RT.  (2019) “Adaptive Bayesian Time-Frequency Analysis of Multivariate Time Series.” Journal of American Statistical Association. 114(525): 453-465.   [R and Matlab Programs]

Krafty RT, Rosen O, Stoffer DS, Buysse DJ and Hall MH. (2017) “Conditional Spectral Analysis of Replicated Multiple Time Series with Application to Nocturnal Physiology.” Journal of American Statistical Association. 112(520): 1405-1416.   [Matlab Program]



Smagula SF, Stahl ST, Santini T, Banihashemi L, Hall MH, Ibrahim TS, Reynolds CF, Krafty RT, Aizenstein HJ, Zhan L. (2020) “White Matter Integrity Underlying Depressive Symptoms in Dementia Caregivers.”  American Journal of Geriatric Psychiatry. 28(5): 578-582.


Bowman MA, Duggan KA, Brindle RC, Kline CE, Krafty RT, Thayer JF, Hall MH (2019). “Prospective Associations among Objectively and Subjectively Assessed Sleep and the Metabolic Syndrome.” Sleep Medicine. 58: 1-6.


Brindle RC, Duggan KA, Cribbet MR, Kline CE, Krafty RT, Thayer JF, Mulukulata SR, Hall MH. (2018) “Cardiovascular Stress Reactivity and Carotid Intima-Media Thickness: The Buffering Role of Slow-Wave Sleep.” Psychosomatic Medicine. 80(3): 301-306.


Smagula SF, Krafty RT, Thayer JF, Buysse DJ, Hall MH. (2018) “Rest-Activity Rhythm Profiles Associated with Manic-Hypomanic and Depressive Symptoms.” Journal of Psychiatric Research. 102: 238-244.


Robert  Krafty