Publications

For a complete list of publications and preprints, see my full CV.

Methodology

Spieker, A.J., Delaney, J.A.C., and McClelland, R.L. (2015). “Evaluating the treatment effects model for estimation of cross-sectional associations between risk factors and cardiovascular biomarkers influenced by medication use.” Pharmacoepidemiology and Drug Safety 24(12), 1286-1296. [link]

Spieker, A.J. and Huang, Y. (2017). “A method to address between-subject heterogeneity for identification of principal surrogate markers in repeated low-dose challenge HIV vaccine studies.” Statistics in Medicine, 36(26), 4167-4181. [link]

Stephens-Shields, A.J., Spieker, A.J., Yang, W., Anderson, A., Drawz, P., Fischer, M., Sozio, S.M., Feldman, H., Joffe, M., Green, T., and the CRIC Study Investigators. (2017). “Blood pressure and the risk of chronic kidney disease progression using multistate marginal structural models in the CRIC study.” Statistics in Medicine, 36(25), 4071-4080. [link]

Spieker, A.J., Roy, J.A., and Mitra, N. (2018). “Analyzing medical costs with time-dependent treatment: The nested g-formula.” Health Economics, 27(7), 1063-1073. [link]

Spieker,A.J., Delaney,J.A.C., andMcClelland,R.L. (2018). “A method to account for covariate- specific treatment effects when estimating biomarker associations in the presence of endogenous medication use.”Statistical Methods in Medical Research, 27(8), 2279-2293. [link]

Applications

Wang, L., Spieker, A.J., Li, J., and Rutkove, S.B. (2011). “Electrical impedance myography for monitoring motor neuron loss in the SOD1 G93A amyotrophic lateral sclerosis rat.” Clinical Neurophysiology 122(12), 2505-2511. [PubMed]

Jafarpoor, M., Spieker, A.J., Li, J., Darras, B.T., and Rutkove, S.B. (2011). “Assessing electrical impedance alterations in spinal muscular atrophy via the finite element method.” Conference Proceedings: IEEE Engineering in Medicine and Biology Society 2011, 1871-1874. [PubMed]

Nodera, H., Spieker, A.J., Sung, M., and Rutkove, S.B. (2011). “Neuroprotective effects of Kv7 channel agonist, retigabine, for cisplatin-induced peripheral neuropathy.” Neuroscience Letters 505(3), 223-227. [PubMed]

Narayanaswami, P., Spieker, A.J., Mongiovi, P., Keel, J.C., Muzin, S.C., and Rutkove, S.B. (2012). “Utilizing a handheld electrode array for localized muscle impedance measurements.” Muscle and Nerve 46(2), 257-263. [PubMed]

Li, J., Staats, W., Spieker, A.J., Sung, M., and Rutkove, S.B. (2012). “A technique for performing electrical impedance myography in the mouse hind limb: data in normal and ALS SOD1 G93A animals.” PLoS One 7(9), e45004. [link]

Sung, M., Spieker, A.J., Narayanaswami, P., and Rutkove, S.B. (2013). “The effect of subcutaneous fat on electrical impedance myography when using a handheld electrode array: the case for measuring reactance.” Clinical Neurophysiology 124(2), 400-404. [PubMed]

Li, J., Spieker, A.J., Rosen, G.D., and Rutkove, S.B. (2013). “Electrical impedance alterations in the rat hind limb with unloading.” Journal of Musculoskeletal and Neuronal Interactions 13(1), 37-44. [PubMed]

Spieker, A.J., Narayanaswami, P., Fleming, L., Keel, J.C., Muzin, S.C., and Rutkove, S.B. (2013). “Electrical impedance myography in the diagnosis of radiculopathy.” Muscle and Nerve 48(5), 800-805. [PubMed]

Sung, M., Li, J., Spieker, A.J., Spatz, J., Ellman, R., Ferguson, G., Bateman, T., Rosen, G.D., Bouxsein, M., and Rutkove, S.B. (2013). “Spaceflight and hind limb unloading induce similar changes in electrical impedance characteristics of mouse gastrocnemius muscle.” Journal of Musculoskeletal and Neuronal Interactions 13(4), 405-411. [PubMed]

Hsi, R.S., Spieker, A.J., Stoller, M.L., Jacobs, D.R., Jr., Reiner, A.P., McClelland, R.L., Kahn, A.J., Chi, T., Szklo, M., and Sorensen, M.D. (2015). “Coronary artery calcium score and association with recurrent nephrolithiasis: the Multi-Ethnic Study of Atherosclerosis.” Journal of Urology 195(4), 971-976. [PubMed]

Johnson, M., Pierson, E.R., Spieker, A.J., Nielsen, S., Posso, S., Kita, M., Buckner, J., and Goverman, J. (2016). “Distinct T cell signatures define subsets of multiple sclerosis patients.” Neurology: Neuroimmunology & Neuroinflammation 3(5):e278. [PubMed]

Technical Reports

Spieker, A.J., Oganisian, A., Ko, E., Roy, J.A., and Mitra, N. “A causal approach to analysis of censored medical costs in the presence of time-varying treatment.” Pending submission to Journal of the American Statistical Association, arXiv:1705.08742. [link]

Software

uwIntroStats [CRAN]
endogenous [CRAN]